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Helen [10]
1 year ago
15

Solve the equation f(x)=x3+2x2+4x+8 given that one of its roots is x=−2.

Mathematics
1 answer:
Dafna11 [192]1 year ago
4 0

Okay, first you need to understand that function of x, (or f(x)) is y.

We now plug in x.

f(-2) or y=
-2(3)+(2•2)+4(-2)+8
f(-2)=-6+4+-8+8

f(-2)=-2

When x=-2, y=-2. Lets plug it back in to see if its true.

-2=-2(3) + (2x2) + (4(-2)) + 8

-2 = -6 + 4 + -8 + 8

-2 = -2.

Heart if it helps, comment if you need help.

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If f(x) = 6(9)^x then f(1/2) =?
Oksi-84 [34.3K]
F(x) = 6(9)^x

f(1/2) = 6(9)^(1/2)

f(1/2) = 6(9)^(0.5)

f(1/2) = 6*(9^0.5)               9^0.5 = √9 = +3 or -3.

f(1/2) = 6*3 = 18          or       6*-3 = -18

f(1/2) = 18   or   -18     

Hope this helps.
4 0
3 years ago
GEOMETRY URGENT HELP NEEDED
son4ous [18]

First we find the measurement of dark dot .

ANd for that we have to use the formula of the angle formed by the intersection of chord .

Let the dark dot be t.

So we have

t =\frac{1}{2} (96+66)=81

t and z are linear pair and sum of angles of linear pair =180 degree.

So we get

t+z=180 \\ 81+z =180 \\ z = 180-81 =99 degree

4 0
3 years ago
I need help with this, I’ll give brainliest!
Ivanshal [37]

Answer:

A

Step-by-step explanation:

Only graph A satisfies the domains provided

8 0
3 years ago
1. Each month, the city of Accra generates an average of 28 pounds of waste. Assume the variable is approximately normally distr
Molodets [167]

1. Answer: given: an average of 28 pounds

a.

Find z values corresponding to 27 and 31:

z=%2827-28%29%2F2=-1%2F2=-0.5

z=%2831-28%29%2F2=3%2F2=1.5

Find the area between z+=+-0.5 and z=+1.5

Table E gives us an area of 0.9332-0.30=0.6247=> The probability is 62.47%

b.

Find z values corresponding to 30.2

z=%2830.2-28%29%2F2=2.2%2F2=1.1 Find the area to the right of z+=1.1

it gives you an area of 0.1357=> The probability is 13.57%

7 0
2 years ago
Evaluate the expression 81-8^2
Tpy6a [65]

Answer:

17

Step-by-step explanation:

Do the exponent first, then subratct it to 81

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3 years ago
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