1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Keith_Richards [23]
3 years ago
13

If the output of the equation f(x)=3x+7 is -2 what is the input and how do you solve it?

Mathematics
1 answer:
Kisachek [45]3 years ago
5 0

-2 = 3x + 7

subtract 7 from both sides

-9 = 3x

divide by 3

-3 = x

check

-2 = 3 (-3) + 7

-2 = -9 + 7

-2 = -2

You might be interested in
Rectangle A measures 8 inches by 4 inches. Rectangle B is a scaled copy of Rectangle A. Select all of the measurement pairs that
Anna007 [38]

Answer:

Step-by-step explanation:

Rectangle A measures 8 inches by 4 inches. Rectangle B is a scaled copy of Rectangle A. Select all of the measurement pairs that could be the dimensions of Rectangle B.

15 inches by 11 inches

6 inches by 3 inches

18

6 inches by 2 inches

12

16 inches by 8 inches

10 inches by 5 inches

15 inches by 7.5 inches

10 inches by 6 inches

8 0
3 years ago
A triangular courtyard has a perimeter of 120 meters. The lengths of two sides are 30 meters and 50 meters. How long is the thir
Masja [62]

Answer:

the third side is 40 m long

Step-by-step explanation:

The perimeter of the triangle is the sum of its three sides, and they give you what that value in meters is (120 m)

Your are given the length of two of them: 30 m and 50 m, and need to find the third one (let's call it "x" for this unknown side)

Now set the following equation:

Perimeter = side 1 + side 2 + side 3   --> replace these with the info you know

120 m = 30 m + 50 m + x   --> add 30 m and 50 m obtaining 80 m

120 m = 80 m + x  --> now solve for x (isolate the x on one side) by subtracting 80 m from both sides

120 m - 80 m = x  --> perform the subtraction 120 m - 80 m = 40 m

40 m = x

Which tells us that the third unknown side has a length of 40 m

7 0
4 years ago
Read 2 more answers
Which expression represents, 8 times the difference of two numbers?
tiny-mole [99]

Answer:

C, the difference is subtraction so 8 times the difference of two numbers is C

4 0
3 years ago
Read 2 more answers
Can someone please help, I'll give brainliest!!! WORTH 40 PTS!
Studentka2010 [4]

Answer:

X = 14.48528137

Step-by-step explanation:

  1. ADD 72 TO BOTH SIDES
  2. SQUARE ROOT 72
  3. ADD 6
  4. X = 14.48528137
5 0
3 years ago
I don’t get this you have to do PEMDAS for this
Taya2010 [7]

Answer:

The answer would be 7. By using PEMDAS 6 to the power of 2 equals 36. Then you divide 36 by 3 to get 12. The final step would be to subtract 5 from 12 to get 7. <u>So 7 is your answer</u><u>.</u>

5 0
3 years ago
Other questions:
  • Eleanor had a gross income of $2,478.15 during each pay period in 2010 if she got paid monthly how much of her pay was deducted
    13·1 answer
  • Fatima has 1/2 gallon of milk. She wants to pour all the milk into 6 glasses. What fraction of a gallon should she pour into eac
    10·1 answer
  • What is 3.14 x 11 x2
    6·2 answers
  • What is the length of segment AC?
    8·2 answers
  • An empty erlenmeyer flask that weighs 245.8 g is filled with 125 mL of carbon tetrachloride . The weight of the flask and carbon
    9·1 answer
  • Plz guys help me to find the area of this rectangle.<br>​
    11·2 answers
  • Aliya buys p pounds of apples for $2 per pounds. Write an algebraic expression to find the total cost?
    10·1 answer
  • Find the value of this expression if x = 7 and<br> y = 1<br> xy^2/-8
    12·1 answer
  • Last question. Will give brainliest.<br>What is 1917291+1816191-18263​
    15·1 answer
  • Explain and demonstrate the multiplication of complex conjugates using 2+3i and its complex conjugate. Be sure to discuss all st
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!