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2 years ago

What is the value of -4x + 12 if x = -4

Mathematics

2 answers:

Nezavi [6.7K]2 years ago

5 0

Answer:

Step-by-step explanation:

substitute x for negative four -4(-4)+12=

solve -4 * -4= 16

add 16 and 12 equals 28

Julli [10]2 years ago

5 0

Answer:

Step-by-step explanation:

-4x + 12

Let x = -4

-4 (-4) +12

16+12

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Type the correct answer in the box. Use numerals instead of words. If necessary, use / for the fraction bar.

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Step-by-step explanation:

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2 years ago

Graph the line that is parallel to y = 3x - 7 that passes through the point (2, 1)

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Answer:

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3 years ago

The function f(x) = –x2 + 20x – 75 models the profit from one customer, in dollars, a shop makes for printing photos, where x is

trasher [3.6K]

The function is graphed as shown below

Part A:

We use the formula $- \frac{b}{2a}$ to find the vertex of the function. A quadratic function of the form of $a x^{2} +bx+c$ and equating this form to the given function $- x^{2} +20x-75$ , we have
$b=20$ and $a=-1$ .

Substituting $a$ and $b$ into the vertex formula, we have
$x=- \frac{20}{2(-1)}=10$ , as shown in the graph

This calculation means that the highest profit is achieved when the number of photo printed equals to ten photos

Part B:

We can find solution to this equation by factorising

$- x^{2} +20x-75=0$
$-( x^{2} -20x+75)=0$
$x^{2} -20x+75=0$
$(x-5)(x-15)=0$
$x=5$ and $x=15$ , as shown in the graph

The two values means that the company makes no profit when they either produce 5 or 15 photos

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3 years ago

The length of a rectangle is 3 inches longer than half of its width. The area of the rectangle is 416 square inches. How many in

Pie

Answer:

C. 26 Inches

Step-by-step explanation:

Using process of elimination you can tell the answer. 26*(13+3)=416

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2 years ago

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Answer: a = 4k + 4q ÷ 3

Step-by-step explanation:

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3 years ago