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
Anna71 [15]
3 years ago
10

David keeps records of his monthly earnings. Last month he worked 120 hours and earned $2700. This month he worked 100 hours and

earned $2300. Which equation could you use to find f(x), the amount he would earn at this rate if he worked x hours?
f(x)=120x+400

f(x)=400x

f(x)=100x+300

f(x)=20x+300

and tell me why it's the answer.... please. ^-^"
Mathematics
2 answers:
lianna [129]3 years ago
8 0
F(x) = 20x+300
you sub in the x values (120 hours and 100 hours) for each equation
the only one they both work for is the last one
f(x) = 20x + 300
f(100) = (20 * 100) + 300 = 2000 + 300 = 2300

f(120) = (20 * 120) + 300 = 2400 + 300 = 2700
Anastaziya [24]3 years ago
7 0
Substitute x in the equations for numbers of hours worked, and you should look for the one that gets the right amount of money.

If you use 120 hours, you should look for the equation that gives you the answer of 2700:

f(x)=120x+400
120(120) + 400 =14800

f(x)=400x
400(120) = 48000

f(x)=100x+300
100(120) + 300 =12300

<span>f(x)=20x+300
</span>20(120) + 300 = 2700

Just to check, use the other number of hours: 100 hours.. You should expect to see an answer of 2300:
f(x)=20x+300
20(100) + 300 = 2300

the equation you want is f(x)=20x+300
You might be interested in
1. Write an equation in slope-intercept form of the line that passes through the given points.
MrRissso [65]

I wrote the answers in the pictures...

5 0
3 years ago
Simplify each expression:
likoan [24]
<span>I'm a little rusty, but I'll do what I can!

-21x -19 =

</span><span>x +2 =

</span><span>11.8 + 2.6y =

</span><span>-54m + 87wm + 35w =

3y + 115 =

Please let me know if you need a little explanation. But I would prefer if you didn't. lol</span>
8 0
3 years ago
28/49 in simplest form
Gennadij [26K]
4/7 is 28/49 in simplest form.<span />
5 0
3 years ago
Read 2 more answers
A submersible vessel at an elevation of -75 feet to 5 times that elevation what is the vessel’s new elevation
liubo4ka [24]

Answer:

375 ft

Step-by-step explanation:

you just multiply it times 5

6 0
4 years ago
Read 2 more answers
With the radius of 2 Find the volume of the sphere. Round your answer to the nearest tenth. Use 3.14 for it. The volume of the s
Jet001 [13]

Answer:

Solution given:

radius[r]=2in

π=3.14

we have

volume of sphere=\frac{4}{3} \pi {r}^{3}=\frac{4}{3} ×3.14× {2}^{3}=33.5in³is your answer.

6 0
3 years ago
Other questions:
  • COME ON NOBDY IS HELPING ME I DONT WANT TO GO TO STUDY HALL CAN U PLZZ HELP WITH 1 2 3 and 4 PLZZZZ THATS ALL IBWANT FOR MY BIRT
    9·1 answer
  • There are 350 calories in 1 1/2 cups of spaghetti. Two cups of spaghetti have
    6·1 answer
  • What number must you add to complete the square?<br> x^2+12x=5
    14·1 answer
  • The distance to a thunderstorm is the number of seconds between seeing the lightning and hearing
    15·1 answer
  • Hi can someone please explain ​
    10·1 answer
  • Ugentttt <br> Identify each ratio as proportional or not to ratio 3:7
    12·1 answer
  • Consider the expression<br> 10x2 + 5x – 25. <br> What is the GCF (greatest common factor)?
    8·2 answers
  • 13. Which equation has real, rational, and unequal roots?
    14·1 answer
  • A • 3 = -30 find the value of the variable
    11·1 answer
  • (4 + 18 ➗3) x 4 - 3 evaluate each expression
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!