3 years ago

3. Solve by completing the square. x^2+8x-9=0 The solutions are x =

2 answers:

6 0

Step 1: Factor left side of equation.
(x - 1)(x + 9) = 0

Step 2: Set factors equal to 0.
x-1=0 or x+9=0
x = 1 or x = -9

The solutions are x = 1 or x = -9

Lelu [443]3 years ago

3 0

Answer:

is it like exponets

Step-by-step explanation:

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How to work out 2(x+2)=-6+2x

nasty-shy [4]

Answer:

no solution

Step-by-step explanation:

2(x+2)=-6+2x

distribute the 2 in the parentheses: 2x+4=-6+2x

add the -6 to the other side to get rid of it on the side that it is on: 2x+10=2x

then subtract the 2x: 10=0x or 10=0

the equation is not solvable

4 0

3 years ago

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19. What is the probability of tossing a penny and landing on heads two times in a row?

Vika [28.1K]

19).
The probability of landing on heads the first time is 1/2.
The probability of landing on heads the second time is 1/2.
The probability of landing on heads both times is

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20).
The volume of the solid deck is

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7 0

3 years ago

Given the functions f(x) = 7x + 13 and g(x) = x + 2, which of the following functions represents f[g(x)] correctly?

LenKa [72]

Answer:

B. f(g(x)) = 7x + 27

Step-by-step explanation:

We have, f(x) = 7x+13 and g(x) = x+2.

So, the function f(g(x)) is obtained by substituting the function g(x) = x+2 in f(x) = 7x+13,

i.e. f(g(x)) = f(x+2)

i.e. f(g(x)) = 7 × (x+2) + 13

i.e. f(g(x)) = 7x + 14 + 13