A train travels at an average speed of 80 km/h. How long will it take the train to travel 320 km?
Answer:
4 hours
Step-by-step explanation:
If the train travels at ~80 kilometers per hour, you just divide the total distance (in this case, 320 kilometers) by the speed traveled (80 kilometers). 320/80 = 4 hours.
The area of the shaded region is . What is the area of the unshaded region?
A.7ft2
B.21ft2
C.42ft2
D.84ft2
can someone PLEASEEEE help me on this
Answer:
Step-by-step explanation: <
Answer:
(b) 1/3
Step-by-step explanation:
A function "zero" is a value of x that makes the value of the function be zero. It may also be called a "root" of the function. On a graph, it is an x-intercept.
The zeros are the solutions to the equation f(x) = 0. For a quadratic like the one given, there are two of them. For this function, they are distinct, so one will be larger than the other.
GraphThere are a number of ways the solutions to this equation can be found. Technology, in the form of a graphing calculator, can show you the x-intercepts easily (see attached). They are x=-2/5 and x=1/3.
FactoringWe can also factor the equation. Doing this requires that we find factors of the product (15)(-2) = -30 that have a sum equal to the coefficient of x, +1. Here are some factor pairs:
-30 = (-1)(30) = (-2)(15) = (-3)(10) = (-5)(6)
The corresponding sums are 29, 13, 7, 1. Hence the last factor pair, {-5, 6}, is the one we need.
Rewriting the 3-term polynomial to a 4-term polynomial by splitting the middle term using these factors, we have ...
15x² -5x +6x -2 = 0
Factoring pairs of terms gives ...
5x(3x -1) +2(3x -1) = 0
(5x +2)(3x -1) = 0 . . . . . . . factor out the common factor
The product of these factors can only be zero of one of them is zero. (This is the "zero product rule.") Setting the factors to zero, we find the values of x that make f(x) = 0: the zeros of the function.
5x +2 = 0 ⇒ x = -2/5
3x -1 = 0 ⇒ x = 1/3
The zeros of the function are -2/5 and 1/3.
The larger zero is 1/3.
Draw as many different triangles as possible that have two sides of length 4 cm and a 45° angle. Clearly mark the side lengths and angles given.
(points per unique attached triangle illustration that is fitting this criteria).
Please help!
Answer:
this is a 45 angle in the picture i hope this helps
Step-by-step explanation:
29. MULTIPLE CHOICE What is the median of the data set? (Skills Review Handbook)
12, 25, 16, 9, 5, 22, 27, 20
(A) 7 (B) 16 (C) 17 (D) 18
Answer:
15.75
Step-by-step explanation:
first add
12+25+16+9+5+22+27+20=126
then divide by how ever many numbers there are in this case there's 8:
126÷8=15.75
there is a bag containing 26 tiles,each marked with a diffrent letter. what us the ratio of vowel tiles to consonant tiles?
A. 1:21
B. 5:21
C. 25:26
Answer:
B. 5 : 21
Step-by-step explanation:
Vowels: a, e, i, o, u= 5 vowels
Constants: b, c, d, f, g, h, j, k, l, m, n, p, q, r, s, t, v, w, x, y, z: 21 constants
v : c
5 : 21
Answer:
5:21
Step-by-step explanation:
There is 5 vowels in the alphabet.
There is 21 consonant in the alphabet.
So it is 5:21
pls help it says 1c.) On the number line, show all the values of t that make your inequality true. Select the appropriate inequality from the icons shown below and draw the location on the number line where you would like to place it. (screenshot below)
Answer: Please give all parts of the question. 1a and 1b
Step-by-step explanation:
Triangle ABC is transformed to form triangle A′B′C′.
A is at (3, 1), B is at (1, 8), and C is at (7, 2).
Which transformation happened to △ABC to form △A′B′C′?
Drag and drop the the correct answers into each box to complete the sentence.
△ABC____, _____ is Response area Response area to form △A′B′C′ .
Options:
1. Rotated Clockwise
2. Translated
3. Dilated
4. Reflected
5. 90° about the origin
6. 180° about the origin
7. 270° about the origin
8. across the x-axis
9. across the y-axis
10. across the line y = x
11. 1 unit right 2 units down
12. 2 units right 1 unit down
13. 4 units left 3 units up
14. by a factor of 2
15. by a factor of 3
16. by a factor of 5
Please help, I'll give brainliest!
Step-by-step explanation:The given graph is a line graph, represents increasing and decreasing rainfall in six different years.The given graph misleads ,in terms of length, when amount of rainfall 4.6-3.9 is plotted with six different years 2006-2011. When rainfall decreases from 4.5 to 4.4, the decrease , in length of rectangle is less,should be equal, in comparison to when year increases from 2006 to 2007. It must be in the shape of Square.
Part B if instead of line graph, we will draw bar graph ,representing Amount of rainfall(4.5-3.0) on y axis in the month of July, to 6 different years from (2006-2011) on x axis,i think it will be least misleading.
10 points and brainly
Answer: X, Y, X
Step-by-step explanation: If the x term becomes negative it was over the y axis, if the y term becomes negative it was over the x axis
You are using a hose to fill up your backyard swimming pool on a hot day. Water flows out of the hose at a rate of 6 gallons per minute. In the equation below, m is the number of minutes the hose has been running, and g is the number of gallons of water in the pool.
The relationship between these two variables can be expressed by the following equation: g = 6m
Identify the dependent and independent variables.
Answer:
dependent variable = g = gallons of water in pool
independent variable = m
g is dependent on the value of m
Step-by-step explanation:
Given the following table, determine the matching representations.
x | y
-3 I -5
-1 I -3
0 I -2
4 I 2
7 I 5
Answer:
its y=x-2
Step-by-step explanation:
If you do -3-2=-5 and if you keep applying that rule you will find that it equals y.
The option that represents the matching representation of the function table is; B: y = x - 2
How to interpret Function Tables?
From the function table given, we see that;
At x = -3, y = -5
At x = -1, y = -3
At x = 0, y = -2
At x = 4, y = 2
At x = 7, y = 5
Looking at the options, the correct one is Option B which is;
y = x - 2
This is because it is the only one that produces all the correct output values of y for corresponding input values of x.
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HELP PLEASE GIVING AWAY 30 POINTS
Answer:
48 inches.
Step-by-step explanation:
The triangle is an isoscele triangle.
An isosceles triangle is a triangle with two sides of the same length.
h is opposite of the other side of 48 inches and judging by the picture, it looks exactly the same, therefore the answer is 48 inches.
Answer:
48 inches
Step-by-step explanation:
the guy a bouve me is right
H) A bar graph shows the favorite food of 20 people.
Does it make sense to describe the distribution of
these data?
Explain.
Answer:
No
Step-by-step explanation:
The data is discrete and so there would be nothing to compare in terms of distribution as there are no similarities between the different categories.
How would 3 1/4 be written as a percent?
A: 0.0325%
B: 3.25%
C: 32.5%
D: 325%
Fractions are parts of a number. Decimals are fractions whose denominators are powers of 10. Percents are numbers out of 100. Therefore, you convert a fraction to a decimal, follow these steps:
Convert the mixed fraction into a whole fraction:[tex]3\frac{1}{4} = \frac{13}{4} = \frac{325}{100}[/tex]
Convert the fraction into a decimal:[tex]\frac{325}{100}[/tex] = 3.25
Convert the decimal into a percent by multiplying by 100:3.25 × 100 = 325%
Your answer is D
You fly a hot air balloon 1.5 miles above the ground. What is the measure of BD⌢, the portion of Earth that you can see? Round your answer to the nearest tenth. (Earth's radius is approximately 4000 miles.)
Answer:
If the radius of the earth is R and the distance of the observer from the earth's surface is d, then the percent of the sphere's surface A that is visible to the observer is given by:
Given that the hot balloon is 1.5 miles above the ground and that the radius of the earth is approximately 4000 miles, then the percent of the earth's surface that you can see is given by:Therefore, the measure of arc BD, the portion of Earth that you can see is 0.0187% of 360 degrees = 0.1 degrees.
Step-by-step explanation:
George is working on a math assignment. He needs to identify which point on the coordinate plane below is located at (7,5). Help George locate the correct point by sharing what you know about the coordinate plane.
Answer:
A is correct.
Explanation:
Given: (7,5) where (x, y)
Identify:
x = 7
y = 5
Go 7 units through x-axis, then move up 5 units along the y-axis.
Answer:
An address on a coordinate plane is made up of an x value and a y value that correspond to the x- and y-axes. This "address" is called a coordinate point, and is written in the form: (x,y). So, you would need to move 7 spaces right and 5 spaces up.
Hope this helps
25. If a single die is tossed, find the probability of obtaining an odd number or a prime number.
Answer:
Its simple,
Its 1/2
Step-by-step explanation:
Because both odd and equal numbers are on a fair die,
The numbers on the die are 1 to 6
So 3 numbers are odd and they are 1,3,and 5
And the rest are even so....
Even = 3/6
Odd =3/6
So the answer is either 0.5 or
1/2
PLEASE HELP I WILL GIVE BRAINLYEST
The area of 5 circles and 10 semicircles and 100 quarter circles stones which has the 10 inches radius is 10995.6 in².
What is the area of the circle?The area of the circle is the space occupied by it. It can be given as,
A=πr²
Here, (r) is the radius of the circle.
The radius of one stone is 10 inches. Thus, the area of one circular stone is,
A=πr²
A=π(10)²
A=314.16 in².
There are total 5 circles and 10 semicircles and 100 quarter circles. The area of 5 circle is,
A=5 x 314.16 in²
A=1570.8 in².
The area of circle is twice the area of semicircle and 4 times the area of quarter circle. Thus the area of 10 semicircle and 100 quarter circles is,
A(semicircle)=(10 x 314.16 in² )/2=1570.8 in².
A(quarter circle)= (100x 314.16 in² )/4=7854 in².
The total area is,
A=1570.8 +1570.8 +7854
A=10995.6 in².
Thus, the area of 5 circles and 10 semicircles and 100 quarter circles stones which has the 10 inches radius is 10995.6 in².
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Please help me with this I would give you 50 points.
Answer:
60 [tex]ft^{2}[/tex]
Step-by-step explanation:
To find the surface area, you need to find the area of all the shapes that make up the pyramid and add them all together.
The area of the square is simply 36 [tex]ft^{2}[/tex], as it is the length times itself (6x6)
To find the area of a triangle, it is bh/2, where b = base, and h = height. The height is 4 ft, and the base is 6 ft as the length of the square is the same as the base of the triangle. (4x6)/2 = 12.
The area of one of the triangles is 12, and they are all identical and there is 4 of them, so 12 x 4 = 48.
Add that to the area of the square:
48 + 12 = 60
Mary is installing carpet in a closet for a customer. A floor plan of the closet is shown. Mary charges $5.60 per square foot of carpet, plus a $150 installation fee.
Please help me with this I would give you 50 points.
Answer: 4 packs of blue, 3 packs of red.
Step-by-step explanation:
All you need to do is find the LCM which is 24, then divide. 24/8=3, and 24/6=4.
I need help -x + 5y = 14, x + 3y = 18 solve by substitution
Answer:
x=6,y=4 equation form
or
(6,4) point form
Step-by-step explanation:
There were 160 containers containing 4/5 liters of oil each. 1/3 liter of oil was poured out of every container. 5/8 of the containers with lesser oil were then stored in a warehouse. The rest of them were bought by Roy. How much oil did Roy buy?
Answer:
Step-by-step explanation:
199.6 liter of oil
Kylie is 5 years older than Ellie and triple Jon's age. If the sum of their ages is 65 , how old is Jon?
PLS HELP! 20 POINT FOR THE RIGHT ANSWER!
Answer:
Jon is 10 years old
Step-by-step explanation:
This is solved using linear equations. We use the information given to make equations.
Let's use K for Kylie, E for Ellie, and J for Jon:
K = E + 5
K = J x 3
Now, we rearrange these equations so that K is on the right side:
E = K - 5
J = K/3
Now, with only one variable, we make a new equation:
K + (K - 5) + (K/3) = 65
Simplify:
2K - 5 + K/3 = 65
Isolate k:
[tex]\frac{7k}{3}-15=65(3) = 195\\7k=196+15=210\\k = \frac{210}{7}=30[/tex]
Now we can plug K in to find Jon's age:
J = K/3
J = 30/3
J = 10
If Kylie is 5 years older than Ellie and triple Jon's age. If the sum of their ages is 65 then Jon is 12 years old.
Let's assume Jon's age is "J" years.
According to the given information:
1. Kylie is 5 years older than Ellie, so Ellie's age is "J + 5" years.
2. Kylie's age is triple Jon's age, so Kylie's age is "3J" years.
The sum of their ages is 65, so we can set up the equation:
J + (J + 5) + 3J = 65
Now, combine like terms:
5J + 5 = 65
Next, isolate "5J" by subtracting 5 from both sides of the equation:
5J = 65 - 5
5J = 60
Now, divide both sides by 5 to find the value of "J":
J = 60 / 5
J = 12
So, Jon is 12 years old.
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pls help me no links
Step-by-step explanation:
The semi-perimeter is:
s = (a + b + c) / 2
= (10 + 24 + 26) / 2
= 47
We will find the area of the triangle using the Heron's formula.
A = √[s (s - a) (s - b) (s - c)]
= √[47 (47 - 10) (47- 24) (47 - 26)]
= √10 × 37 × 23 × 21
= √ 56513
237A letter tile is selected at random from the tiles shown below. What is the sample space?
Answer:
the answer is d cause sample space means all the possible outcomes
Answer:
C) A, B, F, K, S
Step-by-step explanation:
The sample space is the range of values a random variable may have. In this process, the random variable will have the value of one of the letters shown. That is, it will be one of {A, B, F, K, S}.
The sample space is A, B, F, K, S.
_____
Additional comment
If the letters are selected at random with uniform probability, the probability of any given outcome is the ratio of the number of times that letter appears in the population to the total number of letters.
For example, p(A) = 3/9 = 1/3.
Pls help me giving brainiest no links pls
Answer:
(-5,7)- Quadrant 2
(8 1/2,-4)- Quadrant 4
(0,5)-y axis
Step-by-step explanation:
Step 1: Determine where the point lies
(-5, 7) has a negative x value which means that it's either in the second or third quadrant. Now looking at the y value and it being positive we know that we are in the second quadrant.
(8.5, -4) has a positive x value which means that it's either in the first or fourth quadrant. Now looking at the y value and it being negative we know that we are in the fourth quadrant.
(0, 5) has a x value of 0 which means that our point lies on the y-axis.
Problem 14.1
How many numbers are in the list
1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16 ?
Answer:
136
Step-by-step explanation:
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16= 136
Fill in the blanks in questions 8 through 10.
10. A wheel makes 8 revolutions per minute.
At this rate, the wheel will make 360 revolutions in _____________ minutes.
Answer:
45
Step-by-step explanation:
1 minute = 8 revolutions
x minutes= 360 revolutions
Divide 360 by 8
45
The wheel will make 360 revolutions in 45 minutes
Check your work:
If 45 minutes = 360 revolutions, and the wheel revolves 8 times per 1 minute, 8 revolutions x 45 minutes should equal 360 revolutions.
(it does)