The Sum of the first 21 terms of the progression, -18, -15,-12........ is _____
Answer:
3
Step-by-step explanation:
18,15,12,..........
S
n
=45=
2
n
[2a+(n−1)d]
=>
2
n
[2×18+(n−1)(−3)]=45
=>
2
n
[36−3n+3]=45
=>n(39−3n)−90=0
=>39n−3n
2
−90=0
=>3n
2
−39n+90=0
=>n
2
−13n+30=0
=>n
2
−10n−3n+30=0
=>n(n−10)−3(n−10)=0
=>(n−10)(n−3)=0
=>n=10 or n=3
Find the square root of the product of 288 and two thirds and one third
The value of the numerical expression [tex]\sqrt{ 288 \times \left (\frac{2}{3}\right) \times \left (\frac{1}{3}\right)}[/tex] will be 8.
What is the value of the expression?When the relevant components and basic processes of a numerical method are given values, the expression's result is the result of the computation it depicts.
Algebra is the study of algebraic expressions, while logic is the manipulation of those concepts.
The statement is given as "the square root of the product of 288 and two-thirds and one-third".
Then the expression is written as,
[tex]\rightarrow \sqrt{ 288 \times \left (\dfrac{2}{3}\right) \times \left (\dfrac{1}{3}\right)}[/tex]
Simplify the expression, then we have
⇒ √(576 / 9)
⇒ 24 / 3
⇒ 8
The value of the numerical expression [tex]\sqrt{ 288 \times \left (\frac{2}{3}\right) \times \left (\frac{1}{3}\right)}[/tex] will be 8.
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If x is an integer, what is the minimum value of x that satisfies the inequality below?
6x−3(2x−1)>7−4(x+2)
FIRST STEP TO A ANSWER THIS QUESTION IS TO SIMPLIFY THE INEQUALITY.
[tex]6x - 6x + 3 > 7 - 4x - 8 \\ 3 > 7 - 4x - 8 \\ 4x > 7 - 8 - 3 \\ 4x > - 4 \\ \frac{4x}{4} > \frac{ - 4}{4} \\ x > - 1[/tex]
IF THEY SAY X IS AN INTEGER THEREFORE THE MINIMUM VALUE OF X TO SATISFY THE INEQUALITY IS 0
x=0 is the answer
PLEASE HELP! Marta is buying soft drinks for the class party. The table below shows the prices of 4 different packages of cola, the number of bottles in each package, and the ounces of cola per bottle.
The price of a 10-ounce bottle is $0.79
The price of a 12-ounce bottle is $0.99
The price of a 20-ounce bottle is $1.64
The price of the 64-ounce bottle is $4.98
Package price of 10-ounce bottles = $3.19
Number of bottles in the package = 4
Price per bottle = Package price/Number of bottles = 3.19/4
= $0.79
Package price of 12-ounce bottles = $5.99
Number of bottles in the package = 6
Price per bottle = Package price/Number of bottles = 5.99/6
= $0.99
Package price of 20-ounce bottles = $6.56
Number of bottles in the package = 4
Price per bottle = Package price/Number of bottles = 6.56/4
= $1.64
Package price of 64-ounce bottles = $4.98
Number of bottles in the package = 1
Price per bottle = Package price/Number of bottles = 4.98/1
= $4.98
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Which of the following is an obtuse triangle? A. Triangle BB. Triangle CC. Triangle A D. Triangle D
Triangle b is a obtuse triangle.
What is a triangle ?A closed triangle has three vertices, three sides, and three angles. The symbol for a triangle with the three vertices P, Q, and R is PQR. Sandwiches and signboards in the shape of triangles are the most prevalent triangle-shaped objects.
A triangle has an obtuse angle if one of the inner angles is greater than 90 degrees. In an obtuse triangle, if one angle is greater than 90°, the total of the other two angles is also less than 90°.
As the triangle B have one interior angle as 126 degree which is greater than 90
so it follows the property of obtuse triangle
Hence, triangle b is a obtuse triangle.
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The question is One equivalent expressions in the distributive property
Expression given:
[tex]7\cdot(3a+11b)[/tex]The distributive property states that:
[tex]a\cdot(b+c)=ab+ac[/tex]Then, using this property, we can rewrite the given expression as follows:
[tex]=7\cdot(3a)+7\cdot(11b)[/tex]Simplifying we get:
[tex]=21a+77b[/tex]nswer:
[tex]=21a+77b[/tex]Simplify (1 +152 + 5)² + 12 ÷ 2
Answer:
24342.
Step-by-step explanation:
(1 +152 + 5)² + 12 ÷ 2
= 156^2 + 12 / 2
= 24336 + 6
= 24342.
Solve for h: ill give branliest
Answer:
[tex]h = kj + 4g[/tex]
Step-by-step explanation:
[tex] \frac{h - 4g}{j} = k[/tex]
[tex]h - 4g = kj[/tex]
[tex]h = kj + 4g[/tex]
Help! Please Tysm! I Feel Braindead Lol
Answer:
9 lbs. (first answer in the drop-down box)
Step-by-step explanation:
the 3 lightest puppies are weighted 3 lbs. each (the 3 'X's on the very left)
3lbs. x 3 = 9 lbs.
so, the answer is 9 lbs.
. What values of x will make the absolute value equation, 2x - 4= 15, true?
After factorization, the absolute value of the variable 'x' is 9.
What is factorization method?
The factorization method is used for the quadratic based equation whose highest degree is either two or more than two. Depending upon the degree of the variable, the number of factors are calculated. And by substituting the calculated value to check whether the answer is correct or not.
According to the question, the given linear equation is: |2x - 4| = 15
Now, to calculate the value of the variable 'x' by using factorization method. And to remove the bars which represent absolute value that means positive values
Required expression: |2x - 4| = 15
⇒ 2x = 15 + 4 = 19
⇒ x = 19/2 = 9.5
After factorization, the absolute value of the variable 'x' is 9.
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Patients in a study about a new medication were asked to rate their symptoms on a scale from 1 to 10 each hour, over a period of 8 hours after taking the medication. On the given scale, 1 represents symptoms being the least bothersome, and 10 represents them being the most bothersome. It is found that over this time period, the function y=0.5x2−3.6x+8.9 best models the patient's rating y, x hours after taking the medication.
What is the predicted rating 2.5 hours after taking a dose? Round your answer to two decimal places.
It is to be noted that the predicted rating after taking a dose in two decimal places is 5.53. See the explanation below.
What is the explanation for the above answer?Recall that we are given the expression:
y= 0.5x²−3.6x+8.9 .......................function 1
After 2.5 hours,
Predicted Rating (y) =
0.5 (2.5)² - 2.6 (2.5) + 8.9 [Substitute x into the function]
y= 0.5 (6.25) - 2.6 (2.5) + 8.9 [Expand the brackets]
y= 3.125 - 6.5 + 8.9
y= 5.525
Hence the predicted rating in two decimal places is 5.53. This means that the symptoms have been reduced by at least 50%.
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What are the formulas for area of an arc length and area of a sector
Person with the correct answer gets brainliest
Answer:
Step-by-step explanation:
Arc Length = θ × r
area of a sector = (θ/360)*πr 2
Write an expression that represents
the perimeter of the triangle.
3m - 2
5m - 3
2m + 7
The expression that represents the perimeter of the triangle is 10m + 2.
The three sides of the triangle are given as :-
3m - 2 , 5m - 3 and 2m + 7
We have to find the expression that represents the perimeter of the triangle.
We know that,
Perimeter of a triangle = Sum of all three sides of the triangle
Hence, according to the data given in the question, we can write,
Perimeter of the triangle = (3m - 2) + (5m - 3) + (2m + 7) = (3m + 5m + 2m) + (-2 - 3 + 7) = 10m + (-5 + 7) = 10m + 2.
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Jeff earns simple interest in a savings account. he deposited 8700 into the account 2 years ago and earns interest at a rate of 9.8%. what it the total in his account today?
Jeff's savings account, which earns simple interest, has a total amount of 10,405.2 today after 2 years.
Simple interest is given by the formula:
SI = PTR/100
Where SI = simple interest
P = principal
R = interest rate (in percentage)
T = time duration (in years)
If he deposited 8700 into the account 2 years ago and earns interest at a rate of 9.8%, then using the formula, the amount of interest earned can be determined.
SI = PTR/100
SI = 8700(2)(9.8)/100
SI = 1705.2
To get the total amount on his account, add the interest earned to the principal amount he deposited.
total amount = 8700 + 1705.2
total amount = 10,405.2
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Hama is three times as old as David and the sun of their ages is 52. Determine their ages.
Using Algebra, Age of David is 13 years old, and Hama is 39.
Explain what algebra is.The area of mathematics known as algebra deals with symbols and the formulas used to manipulate them. These symbols, which are currently expressed as Latin and Greek letters, are used in elementary algebra to represent variables, or quantities without set values.
If David were n years old and Hamas was 3 years old, then:
n + 3n = 52
4n = 52
n = 13
3n = 3 * 13 = 39
13 plus 39 equals 52
David is 13 years old, and Hama is 39.
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Mr Smith halves a certain number and then adds 8 to the result. He finds that he obtains the same answer if he doubles his original number and then subtracts 8 from the result. What is Mr Smith’s original number?
The original number is 32/3.
What is algebra?A branch of mathematics known as algebra deals with symbols and the mathematical operations performed on them. Variables are the name given to these symbols because they lack set values. We frequently observe constant change in specific variables in our day-to-day situations. But the need to depict these shifting values is ongoing. These values are frequently represented in algebra by symbols such as x, y, z, p, or q, and these symbols are known as variables.
let the number be x
So, halves a certain number and then adds 8 to the result
=1/2 x + 8
and, same answer if he doubles his original number
= 2x
2x - 8 = 1/2x + 8
2x - 1/2 x =8 + 8
3/2 x = 16
x = 32/3
Hence, the original number is 32/3.
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Find the value of X please help, last question for my homework
The value of x for the given similar triangle is found as 8 units.
What is defined as the similar triangles?Similar triangles do seem to be two or more triangles which have all of their corresponding angles equal and all of their corresponding sides proportionate. It makes no difference which way the triangles have been facing. It makes no difference how big they are as long because each side seems to be proportionate.In the particular instance of similar triangles, corresponding makes reference to the angles and sides on both triangles that are in the exact same position. There is a side or angle just on second triangle for each and every angle or side on the first.For the given question;
In similar triangle EDB and ABC,
BC = 1/2 BD
Taking the ratios of the sides;
AC/ ED = BC/ BD
Put the values;
x / (10 - 64) = 1/2
Simplifying;
2x = 10x - 64
x = 64/8
x = 8
Thus, the value of x for the given similar triangle is found as 8 units.
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Given the piecewise function shown below, select all of the statements that are true. (includes pic)
thanks
Answer:
A and C
Step-by-step explanation:
Piecewise functions have multiple pieces of curves/lines where each piece corresponds to its definition over an interval.
Given piecewise function:
[tex]f(x)=\begin{cases}2x \quad &\text{if }x < 1\\5 \quad &\text{if }x=1\\x^2 \quad &\text{if }x > 1\end{cases}[/tex]
Therefore, the function has three definitions:
[tex]\textsf{If $x$ is less than $1$ then $f(x) = 2x$}.[/tex][tex]\textsf{If $x$ equals $1$ then $f(x) = 5$}.[/tex][tex]\textsf{If $x$ is greater than $1$ then $f(x) = x^2$}.[/tex][tex]\textsf{A.} \quad f(1) =5[/tex]
This statement is true as when x = 1, f(x) = 5.
[tex]\textsf{B.} \quad f(5)=1[/tex]
This statement is false as when x is greater than 1, f(x) = x²:
[tex]\implies f(5)=(5)^2=25[/tex]
[tex]\textsf{C.} \quad f(2)=4[/tex]
This statement is true as when x is greater than 1, f(x) = x²:
[tex]\implies f(2)=(2)^2=4[/tex]
[tex]\textsf{D.} \quad f(-2)=4[/tex]
This statement is false as when x is less than 1, f(x) = 2x:
[tex]\implies f(-2)=2(-2)=-4[/tex]
Henry and his friend were buying trick decks from the magic shop for
eight dollars each. How much did they spend if Henry bought five decks
and his friend bought five decks?
Answer:
Henry bought five decks
so that is 8*5 dollars
which is 40dollars
and his friend to bought the same amount so 40 +40 is 80dollars
what must be added to the positive difference between 4³/10 and 7⅔ to obtain 25
The number that must be added to the positive difference of 4³/10 and 7⅔ to obtain 25 is 21 [tex]\frac{19}{30}[/tex]
What number should be added?A mixed number is a non-integer that is made up of a whole number, a numerator and a denominator. An example of a mixed number is 21 [tex]\frac{19}{30}[/tex].
The first step is to determine the positive difference between the mixed numbers. If the difference is positive, it means that the smaller fraction was subtracted from the larger fraction.[tex]7\frac{2}{3} - 4\frac{3}{10}[/tex]
[tex]3\frac{20 - 9}{30}[/tex] = [tex]3\frac{11}{30}[/tex]
The next step is to subtract 3 11/30 from 25
25 - [tex]3\frac{11}{30}[/tex] = 21 [tex]\frac{19}{30}[/tex]
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AB is parallel to DE
.
.
CO
Alicia noticed that:
ZwLx
Ly La
.
B
.
A
w
I
F
E
D
Note: Alicia used the following theorems:
When a transversal crosses parallel lines, alternate interior angles are congruent.
Vertical angles are congruent
Choose 1 answer
A.Angles that form a linear pair are complementary
B. when a transversal crosses parallel lines same side interior angles are congruent
C. when a transversal crosses parallel lines alternate exterior angles are supplementary
D. when a transversal crosses parallel lines corresponding angles are congruent to.
Answer:
D. When a transversal crosses parallel lines, the corresponding angles are congruent.
Step-by-step explanation:
This is quite self-explanatory. It is pretty well-explained in the textbook if you're looking for guidance, practice, or more help.
You need to remember these four theorems:
- Corresponding Angles Theorem
- If two parallel lines are cut by a transversal, then the pairs of corresponding angles are congruent.
- Alternate Interior Angles Theorem
- If two parallel lines are cut by a transversal, then the pairs of alternate interior angles are congruent.
- Alternate Exterior Angles Theorem
- If two parallel lines are cut by a transversal, then the pairs of alternate exterior angles are congruent.
- Consecutive Interior Angles Theorem
- If two parallel lines are cut by a transversal, then the pairs of consecutive interior angles are supplementary.
You have found the following ages (in years) of all 4 bears at your local zoo:
5, 4, 6, 39
What is the average age of the bears at your zoo? What is the variance?
Round your answers to the nearest tenth.
Average age:
Answer: 13.50
Step-by-step explanation: Add all the ages and divide it by the number of bears
The diagram shows a semi-circle inside a rectangle of length 150 m.
The semi-circle touches the rectangle at A, B and C.
Calculate the PERIMETER of the shaded region. Give your answer correct to 3 significant figures. Ive worked out everything so far but im missing a mark
The diagram shows a semi-circle inside a rectangle of length 150 m.
The semi-circle touches the rectangle at A, B and C, the perimeter of shaded region is 267.8m
Perimeter of a circle = 2 πr
Thus, as per the diagram given:
Length of rectangle = 150 m
The radius of semi circle = half of 150 m = 75 m
So, the width of the circle is same as radius = 75 m
The shaded region is bounded by the circumference of a quarter circle (AB) and the two sides measuring it are 75 m each.
Perimeter of Quarter circle = 2πr
On substituting r
Perimeter of Quarter circle = 2π x 75
Perimeter of the shaded region = 117 + 75 + 75 = 267.8 m
The diagram shows a semi-circle inside a rectangle of length 150 m. The semi-circle touches the rectangle at A, B and C, the perimeter of the shaded region is 267.8m
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There is a close relationship between the air pressure inside a hurricane and its maximum
sustained wind speed: y = -0.932x + 973 where x is the air pressure in millibars (kPa) and y is the
wind speed in knots (nautical miles per hour).
The wind speed when the air pressure is 20kpa will be 954.36 miles per hour.
How to illustrate the information?From the information, there is a close relationship between the air pressure inside a hurricane and its maximum sustained wind speed: y = -0.932x + 973.
where x = the air pressure in millibars (kPa) l
y = wind speed in knots (nautical miles per hour).
Therefore, the wind speed when the air pressure is 20kpa will be calculated thus:
y = -0.932x + 973.
y = -0.932(20) + 973.
y = -18.64 + 973
y = 954.36
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There is a close relationship between the air pressure inside a hurricane and its maximum
sustained wind speed: y = -0.932x + 973 where x is the air pressure in millibars (kPa) and y is the
wind speed in knots (nautical miles per hour). Find the wind speed when the air pressure is 20kpa.
Car A travels 60 miles in 2 hours. The distance car
B travels is given by the equation where d is the
distance, in miles, that car B travels in t hours.
Based on this information, which statement is true?
The speed of Car A when it travels 60 miles in 2 hours is 30 miles per hour. This is the rate. Therefore, that is true.
How to illustrate the rate?From the information, it should be noted that Car A travels 60 miles in 2 hours. It should be noted speed is calculated as:
Speed = Distance / Time
It should be noted that speed simply means the distance that's travelled with respect to time.
Speed = 60 / 2
Speed = 30 miles per hour
Note that an overview was given as enough information wasn't given about Car B.
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f+15+7g
terms:
coefficients:
The terms are f, 15 and 7g and the coefficient of 7g is 7.
What is the coefficient of a polynomial?
A coefficient in mathematics is a multiplicative factor in some term of a polynomial, series, or expression; it is generally a number, although it can be any expression (including variables such as a, b and c). When the coefficients are variables in and of themselves, they are referred to as parameters.
The terms in the expression f+15+7g are f, 15 and 7g and the coefficient of 7g is 7.
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The graph of f(x) = |x| has been stretched by a factor of 2.5. If no other transformations of the function have
occurred, which point lies on the new graph?
(-4,-4)
(-3,7.5)
(-2,5.5)
(-1,-2.5)
Answer:
B
Step-by-step explanation:
Due to the absolute value sign....there will be no negatives in the answer for y.... so either b or c
2.5 * |-3| = 7.5 so answer B
A rectangle is 8m longer than it is wide. If the length is increased by 2m and the width is increased 2m, the area is
increase by 68m 2. Find the original dimensions.
Answer:
width=x
length=x+8
area= x(x+8)
new width =x+2
new length=x+10
New Area = (x+2)(x+10)
(x+2)(x+10)-x(x+8)= 68
after solving:
4x=68-20
4x=48
x=12
width=12m
length=12+8=20m
Answer: what
Step-by-step explanation:
Find the measures of the interior angles of the triangle.
Answer:
see explanation
Step-by-step explanation:
the 3 interior angles of Δ ABC sum to 180°
sum the 3 angles and equate to 180
x - 44 + x + 48 = 180
2x + 4 = 180 ( subtract 4 from both sides )
2x = 176 ( divide both sides by 2 )
x = 88
Then
∠ A = 48°
∠ B = x = 88°
∠ C = x - 44 = 88 - 44 = 44°
Scarlett went shopping for a new pair of sneakers. The listed price of the pair of sneakers was $20, but the price with tax came to $21.20. Find the percent sales tax
Answer: 0.06 which is 6% sales tax
Step-by-step explanation: