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3 years ago

What is an expression that is equivalent to 15-5x

Mathematics

2 answers:

ahrayia [7]3 years ago

5 0

Step-by-step explanation:

This could be random. There are endless possibilities. For example

15 * 2 - 5x * 2

= 30 - 10x

etc.

So as long as you know the pattern, you can make many more of them

GrogVix [38]3 years ago

3 0

Answer:

5(3-x)

Step-by-step explanation:

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3 years ago

Find each function value. f(9) if f(x)=5x-16

andriy [413]

If f(x) = 5x - 16, then value of f(9) is 29

Solution:

Given function is f(x) = 5x - 16

We are asked to find the value of f(9)

To find the value of f(9), we have to substitute x = 9 in given function and solve the function

Therefore, substitute x = 9

f(x) = 5x - 16

f(9) = 5(9) - 16

Multiply 5 with 9 which gives 45

f(9) = 45 - 16

Subtract 16 from 45

f(9) = 29

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3 years ago

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4 years ago

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A border of uniform width is placed around a rectangular photograph that measures 8 inches by 10 inches. If the area of the bord

amid [387]

Answer:

width of the border is 3 inches

Step-by-step explanation:

Given data

size = 8 inches by 10 inches

area = 144 square inches

to find out

width of the border

solution

first we consider width of border is x

area of new full rectangle = (8 + 2x ) × ( 10 + 2x )

so we know area of photo = 8 × 10 = 80 square inches

and area of border = 144 square inches that is given

so new area of photo with the border is 80 + 144 = 224 square inches

and we can say that

area of full rectangle - area of the photograph = Area of Border

(8 + 2x) × (10 + 2x) – (80) = 144 square inches

80 + 16x + 20x + $4x^{2}$ – 80 = 144

$4x^{2}$ + 36x – 144 = 0

solve thios equation we get

$2x^{2}$ + 9x – 36 = 0

solve thios equation we get

(x + 12) (x – 3) = 0

so here x have two value one is negative and other is positive

so we consider only positive value

x = -12 or x = 3

width of the border is 3 inches

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3 years ago