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3 years ago

A function is expressed by the formula y = 2x + 7. Find the value of y if x is equal to 1; -20; 43.

Mathematics

1 answer:

rosijanka [135]3 years ago

3 0

Answer:

when x = 1 then y = 9

when x = -20 then y = -33

when x = 43 then y = 93

Step-by-step explanation:

Just replace the given values of x ( which are 1 , -20 , 43 ) in the function

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What is 2/9 multiplied by 2 as a mixed number

olga_2 [115]

Answer:

4/9

Step-by-step explanation:

2/9 multiplied by 2 is 4/9 this can not be turned into a mixed number but can stay a fraction

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3 years ago

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Use Heron's formula to find the area of the triangle. Round to the nearest square foot.

Sphinxa [80]

Answer:

A ≈ 2 ft²

Step-by-step explanation:

The area (A) of a triangle using Heron's formula is

A = $\sqrt{s(s-a)(s-b)(s-c)}$

where s is the semiperimeter and a, b , c the sides of the triangle.

s = $\frac{a+b+c}{2}$ = $\frac{4+4+1}{2}$ = $\frac{9}{2}$ = 4.5

Then

A = $\sqrt{4.5(4.5-4)(4.5-4)(4.5-1)}$

= $\sqrt{4.5(0.5)(0.5)(3.5)}$

= $\sqrt{3.9375}$

≈ 1.9843...

= 2 ft² ( to the nearest square foot )

8 0

2 years ago

-5x-(8-x)=12 how do I solve this problem.<br> show a step by step please in a balance problem

Alex

Answer:

x = -5

Step-by-step explanation:

to evaluate for x in this this question -5x-(8-x)=12

the firsst step, you would open the bracket with - then evaluate for the value of x

solution

-5x-(8-x)=12

-5x -8 + x = 12

combine the like terms

-5x + x = 12 + 8

-4x = 20

divide both sides by the coefficient of x

-4x/-4 = 20/-4

x = -5

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3 years ago

How to identify the slope of the line that passes through the given points 4,4 and -2,-3?

Eva8 [605]

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3 years ago

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klio [65]

Answer:

$= { \rm{ \frac{3}{4} \times 20}} \\ \\ = { \rm{ \frac{60}{4} }} \\ \\ = { \boxed{ \tt{ \: \: 15 \: \: }}}$

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