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
Nuetrik [128]
3 years ago
8

PLEASE HELP FAST!! FIRST ANSWER IS BRAINLIEST IF CORRECT!

Mathematics
2 answers:
kupik [55]3 years ago
7 0
262.6/300% for the first 3 test if you were to add another test it would be 400% total and you need 360% of test grades to have an average of 90% and so 360 - 262.6 = 97.4%
scoundrel [369]3 years ago
5 0

Answer:

You need to score a 97.4%

Step-by-step explanation:

You might be interested in
Use the formula to evaluate the series 1/4 + 1/9 + 1/27 + 1/81.
Dmitriy789 [7]
Is the first term supposed to be 1/4, or did you actually mean 1/3?

I'll assume the latter. Write

S=\dfrac13+\dfrac19+\dfrac1{27}+\dfrac1{81}
S=\dfrac13+\dfrac1{3^2}+\dfrac1{3^3}+\dfrac1{3^4}
\dfrac13S=\dfrac1{3^2}+\dfrac1{3^3}+\dfrac1{3^4}+\dfrac1{3^5}
\implies S-\dfrac13S=\dfrac13-\dfrac1{3^5}
\dfrac23S=\dfrac13\left(1-\dfrac1{3^4}\right)
S=\dfrac12\left(1-\dfrac1{81}\right)
S=\dfrac{40}{81}
8 0
3 years ago
Help me in algebra please
Anit [1.1K]
First, u do -9+8x-4+8
Then, U simplify. The answer is 8x-5
3 0
3 years ago
The expression sin 50 cos 40 + cos 50 sin 40 is equivalent to
enyata [817]
Sin (a+b) = sin a. cos b + cos a. sin b

a= 50° and b=40°, then

sin(50+40) = sin 50° . cos 40° + cos 50° . sin 40°

sin(50+40) = sin 90° = 1 and

sin 50° . cos 40° + cos 50° . sin 40° = 1
8 0
3 years ago
What is the difference of 5 and 2/5? Show your work.
tatuchka [14]

Answer:

This is the answer, let me know if something isn't clear

3 0
3 years ago
Use the Pythagorean theorem to find the missing length in the following right triangle.
lesantik [10]
Hello there!


The Pythagorean Theorem is:

a² + b² = c²

We have b = 48 and c = 50

Remember: The hypotenuse is always longer.

a² + 48² = 50²

a² + 2304 = 2500

a² = 2500 - 2304

a² = 196

a = √196

a = 14

The missing length is 14.

Let me know if you have any questions. As always, it is my pleasure to help students like you!
6 0
4 years ago
Read 2 more answers
Other questions:
  • What is the equation of the line that has a slope of 4 and a y-intercept of -7?
    10·1 answer
  • a soccer player has made 3 of his last 24 shots on goal, or 12.5%. How many consecutive goals does he need to raise his shots-on
    5·2 answers
  • I am greater than 15 I am less than 21 I have 8 ones
    9·2 answers
  • Isaac planted 12 pepper plants. he planted twice as many green pepper plants as red pepper plants. how many green pepper plants
    12·1 answer
  • If f(x)=x^1/2-x and g(x)=2x^3-x^1/2-x, find f(x)-g(x)
    15·2 answers
  • Graph g(x) = -3(x + 2)2 + 2. Compare the graph to the graph of f(x) = x2. Give me five points that you use to graph g(x). Then d
    8·1 answer
  • 3.what is the answer to this problem?
    5·1 answer
  • Look at this cube:
    13·1 answer
  • Two cars start at the same point. One travels north at 65 km/h and the other travels east at 50 km/h. How far are they apart aft
    11·1 answer
  • Finding the inverse function for f(x)=1/x^2
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!