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Scorpion4ik [409]
3 years ago
11

Which expression has a value of 12? A. 3+32 B. 32 +23 C. (4+2)2 D. 42-32

Mathematics
1 answer:
alekssr [168]3 years ago
4 0
The answer is C because if you multiply 4 and 2 by 2 it would become 8 and 4, 8+4=12
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Solve the system of equations below using the substitution method. x = y + 7 / 2 4x − 2y = 8
Verdich [7]

Answer:

y = -3

x = \frac{1}{2}

Step-by-step explanation:

4(y + \frac{7}{2}) - 2y = 8  Distribute the 4.  Multiply everything in the parentheses by 4

4y + 14 - 2y = 8           4(\frac{7}{2}) = \frac{28}{2} = 14  Combine the like terms 4y and -2y

2y + 14 = 8         Subtract 14 from both sides

2y =  -6               Divide both sides by 2

y = -3  

Plug -3 in for y in either original equation.

4x - 2y = 8

4x -2(-3) = 8

4x + 6 = 8    Subtract 6 from both sides

4x = 2  Divide both sides by 4

x = \frac{2}{4} = \frac{1}{2}

Check:

x = y + \frac{7}{2}

\frac{1}{2} = -3+ \frac{7}{2}

\frac{1}{2} = \frac{-6}{2} + \frac{7}{2}

\frac{1}{2} = \frac{1}{2}

4x - 2y = 8

4(\frac{1}{2}) - 2(-3) = 8

2 + 6 = 8

8 = 8

3 0
1 year ago
He difference of two numbers is 50. twice one number equals three times the other. find the numbers.
Juli2301 [7.4K]
X-y=50 and 2x=3y 
x=y+50 so 2(y+50) = 3y 

2y+100=3y
y=100

x-100=50
x=150

so our numbers are 150 and 100 

150-100=50 and 150 is 3*50 and 100 is 2*50 so fits all requirements!

hope this helps you! thank you!
6 0
3 years ago
Use a model to divide 8 by 2/3 and find the quotient
marissa [1.9K]
\frac{8}{2/3}= 12
4 0
3 years ago
Find the probability of exactly four successes in five trials of a binomial experiment in which the probability of success is 40
hodyreva [135]

Answer:

p(4 successes) ≈ 7.7%

Step-by-step explanation:

p(k successes in n trials) = C(n,k)·p^k·(1-p)^(n-k)

You have n=5, k=4, p=0.4, so the probability is ...

p(4 successes) = C(5,4)·(0.4)^4·(1 -0.4)^1 = 5·0.4^4·0.6 = 0.0768

p(4 successes) ≈ 7.7%

8 0
3 years ago
Read 2 more answers
What is the image point of (0,-6) after the transformation D 1/2 or y-axis?
rewona [7]
I think you multiply 1/2 by the x and y point

1/2(0)= 0
1/2(-6)= -3

(0,-3)
6 0
2 years ago
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