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3 years ago

Can someone help me? thanks!

Mathematics

1 answer:

masha68 [24]3 years ago

6 0

So you know that 1 cubic foot is equal to 80 pounds. So, the first point would be (1,80).
You can find the other points by multiply 80 by a number, and when I did that, I got (2,160) and (3,240) too.

I hope this helps :)

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consider the function f(x) = x2 2x – 15. what are the x-intercepts of the function? left-most x-intercept: ( , 0) right-most x-i

eimsori [14]

we have

$f(x)=x^{2} +2x-15$

we know that

The x-intercept is the value of x when the value of the function is equal to zero

in this problem

Find the roots of the function

equate the function to zero

$x^{2} +2x-15=0$

Group terms that contain the same variable, and move the constant to the opposite side of the equation

$x^{2} +2x=15$

Complete the square. Remember to balance the equation by adding the same constants to each side

$x^{2} +2x+1=15+1$

$x^{2} +2x+1=16$

Rewrite as perfect squares

$(x+1)^{2}=16$

Square root both sides

$(x+1)=(+/-)\sqrt{16}$

$(x+1)=(+/-)4$

$x=-1(+/-)4$

$x1=-1+4=3$

$x2=-1-4=-5$

$x^{2} +2x-15=(x-3)(x+5)$

therefore

the answer is

the x-intercepts are the points $(3,0)$ and $(-5,0)$

3 0

3 years ago

Read 2 more answers

How to find horizontal and vertical asymptotes from equations?

julsineya [31]

This is how u would find horizontal and vertical asymptotes

6 0

3 years ago

What is the part and whole of 40% of 20?

pashok25 [27]

The answer is 8

I hope this helps!

5 0

2 years ago

3x+8 if x=2 15 13 16 14

grandymaker [24]

Answer:

Step-by-step explanation:

3*2+8

=14

6 0

3 years ago

Please help me..stuck on problem.

Dvinal [7]

7a
TSA = 2lw + 2lh + 2wh
TSA = 140 + 70 + 100 = 310 ft^2

7b

310 x $4 =$1240
cost = $1240

7c

V= wlh = 7×10×5 = 350 ft^3

4 0

3 years ago