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2 years ago

Identify the interval(s) on which the function y = x^2-3x-40 is positive

Mathematics

1 answer:

MakcuM [25]2 years ago

3 0

Answer:

See below

Step-by-step explanation:

x^2-3x-40 Factor

(x - 8) (x + 5)

The x intercepts are -5 and 8

(negative infinity, -5)

(8, positive infinity)

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What is the opposite of V3?

stich3 [128]

It should be -v3
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2 years ago

At a raffle, 1000 tickets are sold for $5 each. There are 20 prizes of $25, 5 prizes of $100, and 1 grand prize of $2000. Suppos

telo118 [61]

One ticket is worth 200 dollars

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3 years ago

What is the mean of 4,6,7,7,11,12,15,18,20

ExtremeBDS [4]

Answer:

Step-by-step explanation:

4+6+7+7+11+12+15+18+20= 100

divide by the number of values we have. we have 9 values

100/9=11.1111111111

I hope this helped

4 0

3 years ago

Read 2 more answers

A salsa recipe uses 14 ounces of peppers and 7 ounces of onions

mixer [17]

Answer:

$s = salsa$

$p = peppers$

$o = onions$

$s = 14p + 7o$

Step-by-step explanation:

Hope this helps!

14 + 7 = 21 ounces.

8 0

3 years ago

See attached picture, is there a way to enter equations or algebraic symbols?

coldgirl [10]

SOLUTIONS

Solve a given equations or algebraic symbols?

$\begin{gathered} f(x)=x^2+2x \\ g(x)=1-x^2 \end{gathered}$

(A)

$\begin{gathered} (f+g)(x)=(x^2+2x)+(1-x^2) \\ collect\text{ like terms} \\ x^2-x^2+2x+1 \\ (f+g)(x^)=2x+1 \end{gathered}$

(B)

$\begin{gathered} (f-g)(x)=(x^2+2x)-(1-x^2) \\ =x^2+2x-1+x^2 \\ =x^2+x^2+2x-1 \\ (f-g)(x)=2x^2+2x-1 \end{gathered}$

(C)

$\begin{gathered} fg(x)=(x^2+2x)(1-x^2) \\ =x^2-x^4+2x-2x^3 \\ fg(x)=-x^4-2x^3+x^2+2x \end{gathered}$

(D)

$\begin{gathered} \frac{f}{g}(x)=(x^2+2x)\div(1-x^2) \\ =\frac{x^2+2x}{1-x^2} \end{gathered}$

5 0

1 year ago