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3 years ago

Evaluate the function f(x)=4x^2-10+2 find f(-7)

Mathematics

1 answer:

likoan [24]3 years ago

3 0

Answer:

188

Step-by-step explanation:

f(x)=4x² - 10+2

f(-7) = 4x² - 10 + 2

= 4(-7)² - 10 + 2

= 4 (49) - 10 + 2

= 196 - 10 + 2

= 188

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What is the solution to the equation 1/24 x = 1/6? x = 144, x = 30, x = 18, x = 4

alukav5142 [94]

Answer:

x = 4

Step-by-step explanation:

I'd suggest you write (1/24)x = 1/6 to avoid any ambiguity about the coefficient of x.

Multiplying both sides by 24 (the LCD) will eliminate the fractions:

24(1/24)x = 24/6, or x = 4.

5 0

4 years ago

When a number is increased by 9 it is five times its opposite. Find the number.

Alla [95]

Let the unknown number be $x$ .

Then the opposite of this unknown number will be $-x$ .

It is given to us in the question that when this unknown number, $x$ is increased by 9, or in other words when 9 is added to this unknown number, $x$ , then this becomes 5 times it's opposite, which is $-x$ .

Thus, from the given condition in the question, the equation we get is as:

$x+9=-5x$

We will solve this by isolating $x$ as:

$x+5x=-9$

$6x=-9$

$x=-\frac{3}{2} =-1.5$

Thus the required number is -1.5

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3 years ago

Find the volume of the solid: a cone with a base<br> radius of 5 feet and a height of 11.5 feet.

77julia77 [94]

Answer: V≈301.07ft³

Step-by-step explanation:

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2 years ago

For y=4×+2x^2-x^3, show how to find the value of y when x=2

Talja [164]

Just put two instead of x like y = 4.2+2.4(2 squared)-8(cubic 2) that gives y= 8+8-8= 8 then y equals 8

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4 years ago

Solving special systems<br> {y=1/2x+4<br> {-1/2x+y=-5

ryzh [129]

Answer:

no solution

Step-by-step explanation:

Given the 2 equations

y = $\frac{1}{2}$ x + 4 → (1)

- $\frac{1}{2}$ x + y = - 5 → (2)

Substitute y = $\frac{1}{2}$ x + 4 into (2)

- $\frac{1}{2}$ x + $\frac{1}{2}$ x + 4 = - 5 , that is

4 = - 5 ← not possible

This indicates the system has no solution

7 0

3 years ago