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
Vladimir79 [104]
3 years ago
15

Antonette gets $70\%$ on a 10-problem test, $80\%$ on a 20-problem test and $90\%$ on a 30-problem test. If the three tests are

combined into one 60-problem test, which percent is her overall score, rounded to the nearest percent?
Mathematics
1 answer:
notka56 [123]3 years ago
8 0

Answer:

Percentage score will be 83.33 %

Step-by-step explanation:

We have given Antonette gets 70 % on 10 problem test

Let consider here here total problem = total marks

So marks get 10 10 problem test = 10×0.7 = 7

Marks get in 20 problem test = 20×0.8 = 16

And marks get in 30 problem test = 30×0.9 = 27

Now total marks get get by Antonette = 7 +16 + 27 = 50

And total marks = 60

So percentage score of Antonette =\frac{50}{60}\times 100=83.33 %

You might be interested in
Pleasee help ill mark brainliest
borishaifa [10]
A and C are the correct answers.
6 0
3 years ago
Read 2 more answers
According to the graph the system of linear equations has how many solutions
Maurinko [17]

Answer:

infinitely many

6 0
3 years ago
Show that y=cos(t)y=cos(t) is a solution to (dydt)2=1−y2(dydt)2=1−y2. Enter your answers below in terms of the independent varia
GrogVix [38]

Answer:

(\frac{dy}{dt})^2=sin^2t

Step-by-step explanation:

y=cost

DE :(\frac{dy}{dt})^2=1-y^2

If y is a solution of given DE then it satisfied the DE.

Differentiate w.r.t t

\frac{dy}{dt}=-sint

Using the formula

\frac{d(cosx)}{dx}=-sinx

LHS:(\frac{dy}{dt})^2=(-sint)^2=sin^2t

RHS

1-y^2=1-cos^2t=sin^2t

By using the formula

sin^2t=1-cos^2t

LHS=RHs

Hence, y is a solution of given DE

(\frac{dy}{dt})^2=sin^2t

7 0
3 years ago
Kira walks 8 and a half blocks in 17 minutes. If Kira continues to walk at a steady pace, how many blocks will she walk each min
nlexa [21]

Answer:

Half a block ( 0.5 or 1/2 )

Step-by-step explanation:

8 1/2  blocks can also be written as 8.5 blocks.

If Kira walks 8.5 blocks in 17 minutes [and continues to walk at this steady pace], divide 8.5 by 17.

8.5/17 = 0.5

So, Kira walked 0.5 or 1/2 blocks in a minute.

I hope this helps! :)

5 0
2 years ago
Answer Please! I hate khan academy lol​
Zanzabum

Answer:

C; None of the above.

Step-by-step explanation:

Pretend x=1, y=0, and z=2.

You have to match an answer to 1+0-2 (equals to -1).

The first equation would be 2+0+1. When you add them all together you get 3, and that isn't equivalent to -1, so therefore this one is not the answer.

The second equation becomes 1+2+0, and when you solve for the answer, you see that the answer is also 3, and so we can conclude that neither A or B matches with the equation above, so the answer is C, None of the above.

6 0
3 years ago
Other questions:
  • Simplify. x + y - 0 x 2 - y 2
    9·1 answer
  • Kelly decides to pour her punch into 1 quart containers to fit into her refrigerator until the party starts.she has four 1 quart
    15·1 answer
  • To get the correct color, johan mixed 3 1/4 quarts of white paint, 1 2/4 quarts of blue paint, and 2 3/4 quarts of green paint h
    6·1 answer
  • A triangle has the side lengths 5, 7, and 11. Which term best describes the triangle?
    9·1 answer
  • 4xy+4x-6y-6 factored completely
    9·1 answer
  • Which ordered pairs are solutions to the inequality y−2x≤−3?
    12·2 answers
  • marita orders 12 yards of material to make banners. if she needs 1 foot of fabric for each banner, how many banners can she make
    7·1 answer
  • A convenience store sells two brands of orange juice. Brand A contains 8 fluid ounces and costs $1.28. Brand B contains 12 fluid
    13·1 answer
  • I need help with this ‍♀️
    5·1 answer
  • 16 x 0.2 in area model of mulitiplication
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!