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
nata0808 [166]
4 years ago
15

Maria’s math test had 25 questions. She got 84% correct. How many problems did she get wrong

Mathematics
2 answers:
mihalych1998 [28]4 years ago
8 0
Maria got 84% correct, so she got 16% of the questions wrong. If you understand percentages, you'll know that you can multiply 0.16 and 25 to get 16% of 25, which is 4. So she got 4 problems wrong. If you don't understand this, you can use ratios. Set up a proportion to solve instead:

\frac{Number Wrong}{Total Problems} = \frac{Percentage of Questions Wrong}{Total Percentage of Questions} \\
 \frac{x}{25} = \frac{16}{100} \\
x= \frac{16}{4}    \\
x=4

So Maria got 4 questions wrong.
galben [10]4 years ago
3 0
X divided by 25 is 84
Therefore, Maria got 21 correct out of the 25.

Do 25 - 21 (25 for the 25 questions and 21 for the ones she got correct)
25 - 21
=4

So, Maria got 4 problems wrong.
You might be interested in
A bookstore orders 200 books the books are packaged in boxs that hold 24 books each all the boxs the bookstore receives are full
faust18 [17]

Answer: The bookstore  receive 9 boxes.

Step-by-step explanation:

Hi, to answer this question we have to divide the number of books (200) by the number of books that each box contains (24 if it is full).

Mathematically speaking:

200 /24= 8.3333333

This means that the bookstore receives 8 full boxes and 1 box that isn't full.

8 x 24 = 192 books

200 -192 = 8 books (the 9th box will contain 8 books)

In conclusion, the bookstore  receives 9 boxes.

6 0
3 years ago
Read 2 more answers
If the cost is $50 and the selling price is $63 than what percent of increase
Bogdan [553]

Answer:

26%

Step-by-step explanation:

1) Figure out the difference between 63 & 50.(13)

2) Take 13 and divie 50 into it. (13/50 or 0.26)

3) Take you decimal and place it into percent form.

4) 0.26=26%

4 0
4 years ago
Hunter was biking for 2 hours 20 minutes and covered 35 miles during this trip. At the same pace how long would it take him to c
nalin [4]

Answer:

1\ h\ 8\ min

Step-by-step explanation:

we know that

Hunter was biking for 2 hours 20 minutes and covered 35 miles

so

using proportion

Find out how long would it take him to cover 17 miles on this bike

Remember that

1 h=60 min

2 h 20 min=2(60)+20=140 min

Let

x -----> the time to cover 17 miles

\frac{140}{35}=\frac{x}{17}\\\\x=17(140)/35\\\\x=68\ min

therefore

68\ min=1\ h\ 8\ min

8 0
3 years ago
Select the correct answer.
labwork [276]

Answer:

Your answer would be C. x2 + y2 − 4x − 4y + 23 = 0

Step-by-step explanation:

I did this question before. Hope it helps! :D

3 0
3 years ago
The given information were that Robi has run the first 4 miles of a race in 30 minutes and she reached the 6 mile point after 45
strojnjashka [21]

Answer:

Positive

Step-by-step explanation:

Slope: (6-4)/(45-30)

= 2/15

6 0
4 years ago
Other questions:
  • Calculate the average rate of change for the given function, from x = 8 to x = 5.
    12·2 answers
  • 45 45 90 triangle find values of sine cosine and tangeant of 45
    10·1 answer
  • How do you solve x - 1 + 5x = 23​
    10·2 answers
  • Which of the following correlation coefficients represents the strongest linear correlation
    15·1 answer
  • The probability of winning a raffle is 2/5. What is the probability of not winning the raffle?
    13·2 answers
  • Which of the following lines is parallel to x = 7?<br> 3y = 7<br> y = 7<br> Ox=y<br> Ox=4
    11·2 answers
  • Solve the equation: -7/10 = 3a/4 - 13/20?<br><br> Help pleaseeee! Thanks
    10·1 answer
  • Solve 7x -2 + 10x + x + 6x
    15·2 answers
  • Ruby, Joey and sully are baking cookies together. they need 3/4 cup of flour and 1/3 cup of butter to make a dozen cookies. Ruby
    11·1 answer
  • : Đẳng thức nào sau đây đúng ?<br> A. cos4x – sin4x = 2-cos2x B. cos4x – sin4x = 1+2sin2x
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!