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
yawa3891 [41]
2 years ago
15

What is f(2) if f(x) = 2x-5 and f(4) if f(x) = -3x + 15 step by step please!

Mathematics
1 answer:
mash [69]2 years ago
8 0

Answer:

f(2) = - 1 and f(4) = 3

Step-by-step explanation:

To evaluate f(2), substitute x = 2 into f(x), that is

f(2) = 2(2) - 5 = 4 - 5 = - 1

To evaluate f(4), substitute x = 4 into f(x)

f(4) = - 3(4) + 15 = - 12 + 15 = 3

You might be interested in
PLEASE HELP I GIVE THANKS
Sever21 [200]
D
because first you times z and x to get the area and then you multiply that by two added to
h times y divided by two (area of a triangle) times again by two cuz theres two sides
finally add z times y cuz thats the area of the base
and you get 896
8 0
2 years ago
Read 2 more answers
Staples sell for $.60 a box. How many boxes can be bought for $3.45?
True [87]

Answer:

You can buy 5 boxes of staples

Step-by-step explanation:

3.45 divided by $.60 is 5.75 and u cannot get .75 boxes of staples so it rounds to 5.

6 0
3 years ago
Read 2 more answers
Simplify the trigonometric expression sin(4x)+2 sin(2x) using Double-Angle
drek231 [11]

Answer:

{ \bf{ =  \sin(4x)  + 2 \sin(2x) }} \\  = { \bf{2 \sin(2x) \cos(2x)   + 4 \sin(x)  \cos(x) }} \\  { \bf{ = 4 \sin(x) \cos(x) . ({ \cos }^{2}  x -  { \sin}^{2} }x) + 4 \sin(x) \cos(x)  }  \\  = { \bf{4 \sin(x) \cos(x)  ( { \cos }^{2}x -  { \sin }^{2}x + 1)  }} \\  = { \bf{4 \sin(x) \cos(x)  }(2 { \cos }^{2} x)} \\  = { \bf{8 \sin(x)  { \cos}^{3}x }}

8 0
2 years ago
Solve for x.<br> Please helppp
tankabanditka [31]

Answer:

x = 23

Step-by-step explanation:

2x + 19 + 5x = 180

I say this because it is an angle that is equivalent to the one adjacent to 2x+19, which is on a straight line. That means it is equal to 180.

7x + 19 = 180

180 - 19 = 7x

161/7 = x

x = 23

4 0
2 years ago
Read 2 more answers
PLEASE HELP!!! ITS TWO PARTS
tresset_1 [31]

Answer:

$78, $79.20

Step-by-step explanation:

PART A: $60 times 1.3 = $78

you add 30% to 100% to get 130% since it is a mark up, and then you convert to a decimal by going to the left twice then multiplying by original price.

PART B

Since it is a discount you subtract 15 percent from 100, but then add back 5 percent since there is tax applied to get 90%, convert to decimal and multiply by original price to get $88 x .9 = $79.20

6 0
3 years ago
Other questions:
  • Is 7/20 equal to 0.07
    7·2 answers
  • What does x represent for these 4 problems?
    8·1 answer
  • Use the product of powers property to simplify the numeric expression.
    13·1 answer
  • Please help me! There are two pictures, please keep that in mind, long explanations not needed..
    5·1 answer
  • For which values of c does the following polynomial have two complex roots? X^2+4x+C
    14·1 answer
  • Distribute -3(9x^2+10x)
    13·1 answer
  • Salvador sold hats during a weekend sporting event. On Saturday, Salvador sold 47 of the total number of hats. On Sunday, he sol
    13·1 answer
  • Faith makes beaded necklaces that she sells for $3 each. She manages to sell two necklaces every day for seven days if she wants
    13·1 answer
  • What is the answer to this?​
    5·1 answer
  • I need help to solve this
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!