4 years ago

Solve this for me plzzz

Mathematics

2 answers:

sammy [17]4 years ago

8 0

Answer: a- steve

Step-by-step explanation:

Airida [17]4 years ago

3 0

Answer:

B Emma is correct

Step-by-step explanation:

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Please help me answer this

xenn [34]

9514 1404 393

Answer:

B, C, D

Step-by-step explanation:

You can solve for x, or you can try x=3.5 to see if that makes the equation true. Here, we decided to solve for x.

A. x =(8×3 -3)/7 = 3

B. x = 15 -11.5 = 3.5

C. x = (34 -6)/8 = 3.5

D. x = 15.5 -12 = 3.5

E. x = 20 -15.5 = 4.5

3 0

3 years ago

1. The sum of two numbers is 140 and their difference is 20. What are the two numbers?

zysi [14]

Answer:

Step-by-step explanation:

5 0

3 years ago

Consider a set of 7500 scores on a national test whose score is known to be distributed normally with a mean of 510 and a standa

german

$\mathbb P(X>600)=\mathbb P\left(\dfrac{X-510}{85}>\dfrac{600-510}{85}\right)=\mathbb P(Z>1.059)\approx0.145$

So approximately 14.5% of the scores are higher than 600. This means in a sample of 7500, one could expect to see $0.145\times7500\approx10.86$ scores above 600.