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3 years ago

Given f(x) = 2x+5 and g(x) = -2x-2, evaluate: f(-2)

Mathematics

1 answer:

UkoKoshka [18]3 years ago

7 0

Ansswer:

Step-by-step explanation:

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Find the solutions to the following linear-quadratic systems algebraically. Select the ordered pair that is one of the correct s

Ghella [55]

Answer:

(-2, 6)

Step-by-step explanation:

we have

$y=x^{2} +3x+8$ ----> equation A

$y=2x+10$ ----> equation B

equate equation A and equation B

$x^{2} +3x+8=2x+10$

$x^{2} +3x+8-2x-10=0$

$x^{2} +x-2=0$

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$x^{2} +x-2=0$

$a=1\\b=1\\c=-2$

substitute in the formula

$x=\frac{-1\pm\sqrt{1^{2}-4(1)(-2)}} {2(1)}$

$x=\frac{-1\pm\sqrt{9}} {2}$

$x=\frac{-1\pm3} {2}$

$x=\frac{-1+3} {2}=1$

$x=\frac{-1-3} {2}=-2$

Find the values of y

For x=1

$y=2(1)+10=12$

For x=-2

$y=2(-2)+10=6$

therefore

The solutions are (1,12) and (-2,6)

3 0

3 years ago

Part 2

densk [106]

Answer:

672 students

Step-by-step explanation:

To find the answer you would first need to find how many people out of the 75 middle school students didn't prefer apples. Since 67 out of 75 students liked apples we can only assume the other 8 students didn't prefer apples. We will then divide 8 by 75 to get the percentage. This will give us the percentage .106. Next multiply 6,300 by .106 and we get 672.

3 0

4 years ago

Read 2 more answers

Kayla ordered a 5 lbs bag of starburst. 0.50 lbs of the bag is yellow. What percentage of the bag is NOT yellow?

Sergeu [11.5K]

Answer:

90% of the bag isn't yellow.

if you just multiple the 5 by 20 you realize your left with a 100. then if you multiply the .5 by 20 which equals 10. subtract that and you get 90%

3 0

3 years ago

Let a = 6.

Damm [24]

If a=6 and the equation is 4+2a. This is how you wold solve it: 4+2(6)= 4+12= 16. So your answer is B. 16
Hope this helps

8 0

4 years ago

HELP PLS !!!! help help help

aalyn [17]

Answer:

x = 6

Step-by-step explanation:

(17*6)+6 = 108

3 0

2 years ago