Answer:
1,336 year (Approx)
Step-by-step explanation:
Half life of carbon 14 = 5,700 year
Equation used for carbon dating:
t = [5,700/In2]ln[N]
t = [5,700/In2]ln[85%]
t = [5,700/In2]ln[0.85]
t = 1,336 year (Approx)
PLEASE HELP FAST 2 EASY QUESTIONS FOR DOUBLE THE POINTS AND BRAINLIST MAKE SURE YOU READ IT CORRECTLY!
Answer:
2057
2 2
Step-by-step explanation:
Write an equivalent expression for 7 + 5 k minus 2 minus 3 k + n. Which statements are true about the steps for writing the equivalent expression? Check all that apply.
1. Combine the constant terms by adding 7 and –2.
2.The equivalent expression is 9 + 3 k.
3. n, 5 k, and negative 3 k are like variable terms.
4. Combine the like variable terms by adding the coefficients.
5. 5 k and negative 3 k are like variable terms.
6.The constants 7 and –2 are like terms.
7. The equivalent expression is 5 + 2 k + n.
8. Combine the constant terms by adding 7 and 2.
Answer:
1. Combine the constant terms by adding 7 and –2.
4. Combine the like variable terms by adding the coefficients
5. 5 k and negative 3 k are like variable terms
6.The constants 7 and –2 are like terms.
7. The equivalent expression is 5 + 2 k + n.
Estimate a 15% tip on a dinner bill of $41.35 by first rounding the bill amount to the nearest ten dollars.
Answer:
Total you have to pay: $47.55
Tax amt: $6.20
Step-by-step explanation:
Multiply $41.35 by 1.15
How this works, when your increasing an amount you first change the percentage to a decimal number. Afterwards you add the decimal number
Ex: 1 + .15= 1.15
Or the opposite: 1 - .15= .85
Then multiply your original number by the number you got from the previous step.
Ex: $41.35 x 1.15=47.55
And to find how much you increase just do (Final amount-Initial Amount)
which is the answer to this question?
2⋅((4^2)^−1)
1/2
1/4
1/8
1/16
Help with question 4 please
Answer: y=5 x=11
abc=def
ab=de <b=<e
17y-8=12+13y 11x-4=117
-13y -13y +4 +4
4y-8=12 11/11x=121/11
+8 +8 x=11
4/4y=20/4
y=5
Tyler said he has finished reading 27% of his book. If the book has 200 pages, which number is closest to the number of pages Tyler has finished reading?
Answer:
C
Step-by-step explanation:
If you do the math and get the right answer, your answer should be 54.
After that, it should be pretty easy to pick out the right answer.
So that's why the answer is C.
Hope this helped! :)
(V+3)^2 - 44 = 0, where v is a real number
Answer:
v = 2 √ 11 − 3 , − 2 √ 11 − 3Step-by-step explanation:
Take the root of both sides and solve.
Exact Form: v = 2 √ 11 − 3 , − 2 √ 11 − 3
Hope this helps!! Please consider marking brainliest! Have a good one!!
What is the Solution of the System Of equations Shown on the Graph Below
(0,-1)
(0,1)
(1,0)
(-1,0)
850 projects were entered in the science fair. If 86% of the projects did not receive a ribbon, then how many student projects did receive a ribbon?
Answer:
731 of the projects received a ribbon.
Step-by-step explanation:
850 x 0.86 = 731
Hope this helps!
Is xy = yx? Explain how you know
Answer:
Yes
Step-by-step explanation:
xy=yx because either way, you would end with the same product. For example, if x was 3 and y was 2, you would have (3)(2)=(2)(3), giving you 6=6 which is, in fact, a true statement.
The value of a new car decreases by about 15% in the first year. How much will a car be worth after one year if its initial value was $1,500? If you get stuck, consider using diagrams or a table to organize your work.
Answer:
After one year, the car will be worth $1,275.
Step-by-step explanation:
We know that a new car value decreases by 15% every year. So, we first need to find 15% of $1,500.
1,500 x 0.15 = $225.
Now, me must subtract $225 from the initial value, or $1,500.
1,500 - 225 = $1,275
Therefore, after one year, the car will be worth $1,275.
Hope this helps! :D
if 14 of the 22 students in mrs herberts 2nd period class choose math as the favorite subject, what is the P(math)
Answer:
A(math)
Step-by-step explanation:
Determine the output if the function rule is
2x+5 : input = 5
Answer:
2x
Step-by-step explanation:
Answer:
15
Step-by-step explanation:
The input is 5 , the output is the value of 2x + 5 for x = 5 ( input ), that is
output = 2(5) + 5 = 10 + 5 = 15
State the slope and the y-intercept for the graph of the equation. -x+y=4
Answer:
Slope: 1
Y-intercept: (0,4)
Step-by-step explanation: I hope that helps!
Write the equation in Standard Form.
y=3/2x - 6
Answer:
3x - 2y = 12
Step-by-step explanation:
3x-2y=12 is the standard form of equation y=3/2x - 6
What is slope intercept form of line?The slope intercept form of a line is y=mx+b, where m is slope and b is the y intercept.
The equation is y=3/2x - 6
y equal to three by two times of x minus six
y=3/2x - 6
LCM of 1 and 2 is 2
y=(3x-12)/2
Now apply cross multiplication
2y=3x-12
Two times of y equal to three times of x minus twelve
Now take 2y to RHS side
3x-2y-12=0
3x-2y=12
Hence 3x-2y=12 is the standard Form of equation y=3/2x - 6.
To learn more on slope intercept form click:
https://brainly.com/question/9682526
#SPJ2
Brayden drew 9 hearts, 3 stars, and 8 circles. What is the ratio of circles to hearts?
Answer: 8:9
Step-by-step explanation:
Answer:
8 : 9
Step-by-step explanation:
Hearts = 8
Circles = 9
So your final ratio is 8 : 9!
ANSWER ASAP
Which two expressions are equivalent?
A: x(7+4) and 7(x) + 4(x)
B: 7 - (5•x) and (7-5) • x
C: 4(x-9) and 4(x) - 9 (x)
Answer:
Its A
Step-by-step explanation:
10 POINTS Solve the following inequality. 4x-1> -9
Answer:
x > −2
Step-by-step explanation:
~Solve~
Let's solve your inequality step-by-step.
4x−1>−9
Step 1: Add 1 to both sides.
4x−1+1>−9+1
4x>−8
Step 2: Divide both sides by 4.
4x
4
>
−8
4
x>−2
Answer:
x>−2
Find the product of 51 and -2.5. Use the distributive property to rewrite and solve. The first step is done for you. 51(-2.0) + 51(-0.5) What is the next step in using the distributive property to solve this equation?
Answer:
-12.75
Step-by-step explanation:
Find the product of 51 and -2.5. Use the distributive property to rewrite and solve.
The next step using Distributive property is to expand the brackets
5.1 × 2.5
Step 1: Distributive property
51(-2.0) + 51(-0.5)
Step 2: Expand the brackets
-10.2 + -2.55
Step 3
- 12.75
Answer:
-12.75
The next step using Distributive property is to expand the brackets
5.1 × 2.5
Distributive property
51(-2.0) + 51(-0.5)
Expand the brackets
-10.2 + -2.55
- 12.75
A circle with its center at O (6,5) has a radius of 5 units. Point P (2,y) lies on the circle. Also y<4. Find y
Write the word sentence as an equation.
The sum of a number x and 4 equals 12.
An equation that represents this sentence is
.
Answer:
x+4=12
x in this equation would be 8
Answer:
X + 4 = 12
Step-by-step explanation:
you write it in a equation for like if you were writing whats two plus two equals 4 write it equation form ? The answer would be 2+2=4
Solve (y-4)^2+63=0 where y is a real number.
Answer:
[tex] y = 4 + 3 \sqrt{7} i[/tex]
Step-by-step explanation:
[tex](y-4)^2+63=0 \\ \\ (y-4)^2 = - 63 \\ \\ (y-4)= \sqrt{ - 63} \\ \\ y - 4 = 3 \sqrt{7} i \\ \\ y = 4 + 3 \sqrt{7} i[/tex]
Jack wants to buy a pair of trousers for $60 when he went to the store he found that the prices marked down by 20% how much do they cost no
Which of the following is a monomial?
A. 11x-9
B. 20x11 - 3x
C. 20x11
D. 9/x
Answer:
c is the answer of that questoion
A mason is a person who builds structures with bricks, stone, cement block, or tile. A mason usually uses
mortar to hold the bricks together. A general rule of thumb in masonry is that 2 1/2bags of mortar are
needed for every 100 cement blocks.
a. Complete a double number line to determine the amount of mortar needed for each quantity of
blocks.
b. How many bags of mortar will a mason need for 350 blocks?
c. How many bags of mortar will a mason need for 50 blocks?
d. With 12 bags of mortar, how many blocks can the mason lay?
Answer: I think it can be D
hopfully this helps :)
The lines represented by the equations y = 1x – 5 and 3y + x = -15 are
O
parallel
Submit Answer
the same line
neither parallel nor perpendicular
perpendicular
Answer:
Neither parallel nor perpendicular
Step-by-step explanation:
The lines represented by the equations y = 1x – 5 and 3y + x = -15 are .....
Solve for y in 3y + x = -15.
[tex]3y + x = -15 \\ \frac{ - x = - x}{3y = - x - 15} \\ \\ \frac{3y = - x - 15}{3 \: \: = \: \: \: \: \: \: \: \: \: 3} \\ y = - \frac{1}{3}x - 5[/tex]
[tex]y = - \frac{1}{3}x - 5 \: and \: y = 1x - 5[/tex]
will mark brainliest pls answer
Answer:
= 18 square units
Step-by-step explanation:
area = full square units + 1/2 x half-full square units
2
remember that if a square is not full it is NOT full: hence it will be considered as half full.
full square units =12
1/2 full square units =12
12 + 12/2
12 + 6
= 18 square units
Please help me I dont know how this works.
Answer:
Step-by-step explanation:
Average =
Sum
Count
=
17.3
3
= 5.7666666666667
Solve the quadratic equation: x^2+ 2x + 7 = 21
Answer:
x1 = -4.872983346
x2 = 2.872983346
Step-by-step explanation:
Given:
x^2+2x+7=21
Subtract 21 on both sides to get the right side equal to 0:
x^2+2x-14=0
Use the quadratic formula:
x1 = -4.872983346
x2 = 2.872983346
Write the word sentence as an equation. Then solve.
The quotient of a number x and −1.5 is 21.
Equation:
Question 2
Solution: x=
Answer:
-1.5-21x
Step-by-step explanation: