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
Nat2105 [25]
2 years ago
12

If f(x)=−7x+9, find f(3)

Mathematics
1 answer:
Svet_ta [14]2 years ago
3 0

f(3) = 7(3)+9

f(3) = 21+9

f(3) = 30

本题已由中国数学会官方解答(现有会员:3人)  

You might be interested in
Which expression represents the length of the spring after Gerard removes some weight? Gerard adds weight to the end of the hang
Andreyy89

Answer: p+(-q)

Step-by-step explanation:

4 0
2 years ago
Which system of equations is consistent and dependent?
MAXImum [283]

Answer:

Step-by-step explanation:

4x − y = −11

2x + 3y = 5

lets multiply the second equation by -2 and add it to the first:

4x − y = −11

-4x - 6y = -10

------------------

0  - 7y = -21

y = -21/-7

y = 3

now we substitute this result in the first equation to find x:

4x − y = −11

4x - 3 = -11

4x = -8

x = -8/4

x = 2

so the solution is y = 3 and x =2

4x − 9y = −21

−10y = −30

we solve for y

−10y = −30

y = -30/-10

y = 3

and substitute in the first equation:

4x − 9y = −21

4x − 9(3) = −21

4x - 27 = -21

4x = 6

x = 6/4 = 3/2

so the solution is x = 3/2 and y = 3

4x + 3y = 5

2y = −6

we solve for y:

2y = −6

y = -6/2

y = -3

we do substitute in the first equation:

4x + 3y = 5

4x + 3(-3) = 5

4x - 9 = 5

4x = 14

x = 14/4

x = 7/2

so the solution is x = 7/2 and y = -3

7x − 3y = −11

9x = −6

we solve for x:

9x = −6

x = -6/9

x = -2/3

then we substitute in the first equation the result found:

7x − 3y = −11

7(-2/3) − 3y = −11

-14/3 - 3y = -11

we multiply by 3 to eliminate fractions:

-14 - 9y = -33

9y = 19

y = 19/9

so the solution is x = -2/3 and y = 19/9

12x − 3y = −33

14x = −28

we solve for x:

14x = −28

x = -28/14

x = -2

then we substitute in the first equation:

12x − 3y = −33

12(-2) − 3y = −33

-24 - 3y = -33

3y = 9

y = 3

then the solution is x = -2 and y = 3

3 0
3 years ago
Read 2 more answers
Please im begging you guys please please do it for me please
Tasya [4]

When Jamie has $200 to purchase skateboard equipment, he will have spent more than 50 percent.

<h3>How to calculate the percentage?</h3>

From the information given, the total amount spent will be:

= $100 + $60 + $30 + $20 + $20 + $50 + $115

= $395

Since Jamie has $200 to purchase skateboard equipment, the percentage will be:

= 200/395

= 0.51

= 51%

Learn more about percentages on:

brainly.com/question/24304697

#SPJ1

6 0
2 years ago
What is 5 divided by 25
disa [49]

Answer:

0.2

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
The price of a gallon of milk is 3.75. circle the price of milk rounded to the nearest dollar
Dmitry_Shevchenko [17]
If the price of milk is $3.75 then the price of milk rounded to the nearest dollar would be $4.00. Hope this helps!!
8 0
3 years ago
Read 2 more answers
Other questions:
  • Ms. Li Spent $840 on a vacation. she spent 2/3 of the amount on a train ticket and a 1/2 of the remaining amount on food.how muc
    14·1 answer
  • Random samples of size 64 are taken from an infinite population whose mean and standard deviation are 24 and 6.4, respectively.
    12·1 answer
  • Find the slope between two points ( -2,4) 3,-6)
    11·2 answers
  • There are 10 Pokémon cards on a table. Three are identical Pikachu cards, two are identical Charmander
    12·1 answer
  • Please answer below :-)
    12·2 answers
  • Given a/b=x+5, solve for B
    5·1 answer
  • The below image shows the intersection of two lines. What is themeasurement of angle b?
    12·1 answer
  • Math question<br> area of figure​
    11·1 answer
  • a rectangle has a length of 15 inches less than 5 times it’s width. If the area of the rectangle is 2750 square inches. what is
    9·1 answer
  • How many 3/5 are in 1 4/5
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!