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Gemiola [76]
3 years ago
6

Ettiene solved a quadratic equation. His work is shown below.

Mathematics
1 answer:
kumpel [21]3 years ago
5 0

Answer:

Ettienes error was in step 2 .

Step-by-step explanation:

Khan academy

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If f(x) = -4x^2 - 6x - 1 and g(x) = -x^2 - 5x + 3, find (f + g)(x).
Flauer [41]

Answer:

-5x^{2}-11x+2

Step-by-step explanation:

-4x^{2} \\-6x-1-x^{2}-5x+3=-5x^{2}-11x+2

7 0
3 years ago
Compare and Contrast: Two equations are listed below. Solve each equation and compare the solutions. Choose the statement that i
Oksana_A [137]

Answer:

equation 2

Step-by-step explanation:

6 0
2 years ago
Agustin solved an equation as shown. What error did Agustin make? What is the correct answer?
Hitman42 [59]

Subtract 3/4x from both sides

1/3x-4-3/4x= 3/4x+1-3/4x

-5/12x-4=1

Add 4 to both sides

-5/12x-4+4=1+4

-5/12x=5

Multiply both sides by 12/(-5)

(12/-5)*(-5/12x)=  (12/-5)*(5)

x= 12


I hope that's help.

3 0
3 years ago
Use completing the square to solve the equation x^2 0 10x = 08.
wariber [46]
Ok so assuming the 0 means minus from typing problems

x^2-10x=-8

to completet  the square
make sure the term in front of x^2 is 1
that is correct
then take 1/2 of the term in front of the x term and square it
-10/2=-5, (-5)^2=25
add that to both sides
x^2-10x+25=17


answer is the first equation
4 0
3 years ago
Apopulation grows from its initial levelof 22,000 at a continuous growth rcte of 7.1% per year.a) Write a function to model the
solong [7]

Answer:

a) P(t) = 22000(1.071)^{t}

b) The population increases 7.1% each year.

Step-by-step explanation:

The continuous population growth model is given by:

P(t) = P_{0}(1+r)^{t}

In which P(t) is the population after t years, P_{0} is the initial population and r is the growth rate.

In this problem, we have that:

A population grows from its initial levelof 22,000 at a continuous growth rcte of 7.1% per year.

This means that P_{0} = 22000, r = 0.071

a) Write a function to model the population increase.

P(t) = 22000(1 + 0.071)~{t}

P(t) = 22000(1.071)^{t}

b) By what percent does the populaiion increase each year?

r = 0.071

So the population increases 7.1% each year.

6 0
3 years ago
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