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2 years ago

Given f(x) = 3x^2+x+1 g(x)+-2x-1 find (f+g)(-2)

Mathematics

1 answer:

yawa3891 [41]2 years ago

4 0

Answer:

Step-by-step:

f(-2)=3(-2)^2+(-2)+1 g(-2)=-2(-2)-1

f(-2)=-6^2+(-2)+1 g(-2)=4-1

f(-2)=36+(-2)+1 g(-2)=3

f(-2)=34+1

f(-2)=35

f+g ------- 35+3 ------- 38

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Using SET NOTATION, what is the solution set for the following equation? a² - 3 = 22

UNO [17]

The solution set is $\{-5,5\}$

Explanation:

The given equation is $a^{2}-3=22$

To determine the solution set of the equation, let us solve the equation.

Adding both sides of the equation by 3, we have,

$a^2=25$

Taking square root on both sides of the equation, we get,

$a=\sqrt{25}, a=-\sqrt{25}$

$a=5, a=-5$

Thus, the solution of the equation is $a=5, a=-5$

The solution set of the equation is the set which contains all the solutions of the equations.

Thus, writing the solutions of the equation using set notation, we have,

$\{-5,5\}$

Thus, the solution set is $\{-5,5\}$

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3 years ago

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Maslowich

Answer:

(-8 , 2)

Step-by-step explanation:

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1 year ago

3. If the typical balance on Lucy's credit card is $650 and the interest rate (APR) on her credit card is 18%, how much in inter

Hitman42 [59]

First we convert the percentage to a decimal number. 18% means 18 out of 100, so 18/100 = 0.18. Since this is a yearly percentage and we want a monthly, we then divide this by 12. 0.18/12 = 0.015. Next we multiply her typical balance, $650, by this decimal. 650(0.015)=$9.75 in interest for that month.

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2 years ago

Question is the attachment

astraxan [27]

If both pipes are opened. Then the number of hours to fill up the tank fully is 100 hours.

The complete question is attached below.

<h3>What are ratio and proportion?</h3>

A ratio is a collection of ordered integers a and b represented as a/b, with b never equaling zero. A proportionate expression is one in which two items are equal.

Let t be the filling time.

Then we have

Time is inversely proportional to rate of filling tank.

1/20 – 1/25 = 1/t

0.05 - 0.04 = 1/t

0.01 = 1/t

t = 1/0.01

t = 100 hours

More about the ratio and the proportion link is given below.

brainly.com/question/14335762

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