2 years ago

Find y-intercept for y= (x+2)(x-5)

Mathematics

1 answer:

Genrish500 [490]2 years ago

6 0

Answer:

y = -10

Step-by-step explanation:

To find the y-intercept, substitute x=0.

y= (0+2)(0-5)

Then, solve the equation for y.

y = -10

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Answer:

x²+5x-49

Step-by-step explanation:

-7² -x+6x+x²

combine like terms

-x+6x is 5x

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now rewrite the equation

x²+5x-49

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2 years ago

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Solve three and two fifths plus three and four sixths

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Answer:

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Step-by-step explanation:

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A company estimates that it will sell ????(x) units of a product after spending x thousand dollars on advertising, as given by ?

zepelin [54]

Answer:

$(11\frac{1}{3},20)$

Step-by-step explanation:

If the Number of Sales of x units, N(x) is defined by the function:

$N(x)=-5x^3+235x^2-3400x+20000,10\leq x\leq 40$

$N'(x)=-15x^2+470x-3400\\When -15x^2+470x-3400=0\\x=20, x=11\frac{1}{3}$

Next, we text the critical points and the end points of the interval to see where the derivative is increasing.

$N'(10)=-200\\N'(11\frac{1}{3})=0\\N'(19)=115\\N'(20)=0\\N'(40)=-8600$

Thus, the rate of change of sales $N'(x)$ is increasing in the interval $(11\frac{1}{3},20)$ on 10≤x≤40.

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2 years ago

Number 3 please! pic is above^

zmey [24]

Answer:

Step-by-step explanation:

Slope = (y2 -y1)/(x2-x1)

y2 = 800, y1 = 400, x2= 4, x1= 2

Slope = (800-400)/(4-2)

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3 years ago

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elena-14-01-66 [18.8K]

Answer:1 1/20

Step-by-step explanation:

2 5/8 x 2/5

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21/8 x 2/5

(21 x 2) ➗ (8 x 5)

42 ➗ 40

42/40=21/20=1 1/20

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2 years ago