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3 years ago

How many solutions are there to 3x-10(x+2) =13-7x

Mathematics

1 answer:

Vaselesa [24]3 years ago

8 0

This is the following way to solve this problem:

3x-10(x+2)=13-7x

3x-10x-20=13-7x (multiply 10 times what's in the parentheses)

-7x-20=13-7x ( subtract 3x from -10x)

-7x-20-13=-7x ( since the 13 is positive, when we move it to the other

side, we change it's sign, so now we subtract 13 from 20

-7x-7=-7x

-7=-7x+7x ( we do the same thing we did above, now with the -7x)

-7=x

x=-7

Answer: x = -7

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Answer:

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Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 14.5

Standard Deviation, σ = 1.2

We are given that the distribution of hip breadths is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

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3 years ago

(1.)What is the value of 35−3m , when m = 4?

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(1.) 35-3m
m= 4

35-3m
= 35-3(4)
= 35-12 (do the multiple/division first before doing the addition/subtraction)
= 23

C. 23

(2.) 1 + x ÷ 5
x = 80

1 + x ÷ 5
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(3.) mx-y
m=5, x=3, and y=8

mx-y
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(4.) 3a+15+bc−6
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3a+15+bc-6
= 3(7)+15+3(15)-6
= 21+15+45-6
= 75

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3 years ago

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