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
NISA [10]
3 years ago
15

Math please help 10 points!

Mathematics
1 answer:
gizmo_the_mogwai [7]3 years ago
8 0

Answer:


Step-by-step explanation:

average= \frac{sum of scores}{number of tests}

80= \frac{79+81+77+x}{4}

80 x 4 = 79+81+77+x

320=237  + x

320-237 = x

83=x

so Marianne must score 83 points or higher on her last test

You might be interested in
Mr. Fat needs 20 minutes to eat a pound of cereal, while Mr. Thin needs 30 minutes. If they eat together, how long does it take
marishachu [46]
36 minutes.

(1/20)x+(1/30)x=1solve for x (x=0.8333333333......)
Considering they take the same times for all 3 pounds,
That would mean that since 1 pound takes 12 minutes, then 3 pounds take 36 minutes
4 0
3 years ago
Solve for x I got x=28.394. is that correct?
quester [9]
Cosine 65 = 12 / x
0.4226183 = 12 / x
x = 12 / 0.4226183
<span> <span> <span> x = 28.39441</span></span></span>

So, I'd say you are correct.

6 0
3 years ago
Find the area of this parallelogram. HELP ASAP!
Tom [10]

Answer:

260cm^2

Step-by-step explanation:

Given,

Base = 20cm

Height = 13cm

Area of a parallelogram = Base * Height

                                        = 20 * 13

                                        = 260cm^2

6 0
3 years ago
Read 2 more answers
Enc is working as an insurance salesperson. He earns a base salary and a commission on each new policy
mihalych1998 [28]

Answer:

Oh well Is that it explain more

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
A rectangular field is 30 yards in length and 81 feet in width.
PtichkaEL [24]

Answer:

7290in ^2

Step-by-step explanation:

covert 30yd to feet which equals too 90ft.

Then multiple 90 x 81 = 7290

8 0
2 years ago
Other questions:
  • Whats the value of y <br> 2y + 15 = 4y - 45
    7·2 answers
  • Surface area of this rectangluar solid WITHOUT a top
    13·1 answer
  • HELP ME PLSS and thannks
    8·1 answer
  • What is the perimeter of the triangle?
    15·2 answers
  • 12. Use the Distributive Property to write
    5·1 answer
  • What is 10% of 10000
    12·1 answer
  • N + 3.5 = 6.7<br> I need help badly plz
    8·2 answers
  • PLEASE HELP ME THANKS IF U DO (gets reported if link)
    8·1 answer
  • HELPPP plzzzzzz im so lost i hate math -.-
    12·2 answers
  • Maya rides her bike in 3/4 of a mile in 1/2 hour. How<br> far does she rides in 1 hour?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!