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IRINA_888 [86]
3 years ago
10

I don't understand these types of problems...On a test with 25 problems,Grace got 88% correct.How many problems did Grace get co

rrect?
Mathematics
2 answers:
White raven [17]3 years ago
5 0
25 problems = 100%
Anytime you have to find a percent of something, just take whatever 100% is and multiple it by the decimal form of the percent (hopefully that makes sense)

To find out what 88% of the problems are, you would multiple 25 x .88. The answer would be 22.
wlad13 [49]3 years ago
3 0
Its easy, see
Number of problems = 25
Percentage correct = 88%
Therefore, number of problems correct = 88% of 25
88/100 × 25 = 22

Just remember, when percentage comes take it upon hundred and multiply by the total number given.
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25 POINTS!
steposvetlana [31]
-\dfrac12x+3=-x+7

Add -3 to both sides:

-\dfrac12x+3-3=-x+7-3
-\dfrac12x=-x+4

Multiply both sides by -2:

-2\times\left(-\dfrac12\right)x=-2(-x+4)
x=-2(-x+4)

On the right hand side, distribute the -2:

x=2x-8

Add -2x to both sides:

x-2x=2x-2x-8
-x=-8

Divide by -1:

\dfrac{-x}{-1}=\dfrac{-8}{-1}
x=8

(and not x=-8, unless the original equation wasn't correctly written/interpreted?)
5 0
3 years ago
The regular price of a hoodie is $70. There is a sale price of 25% OFF the regular price. What is the sale price?​
dusya [7]

Answer:

$52.50

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Evaluate M^2 /p^2 for M = 10, N =-5p and P = -2
kondaur [170]

<u>Answer: </u>

The solution of \bold{\frac{M^{2}}{P^{2}}} for M = 10, N = -5P and P = -2  is 25

<u>Solution: </u>

From question, given that the value of M is 10 and N is -5p and P is -2

We have to evaluate the value of \frac{M^{2}}{P^{2}},  

By substituting the values of M and N, we get

\frac{M^{2}}{P^{2}} = \frac{10^{2}}{(-2)^{2}}

Expanding \bold{10^{2}}:

Here 10 is the base value and 2 is the exponent value. So the base term 10 is multiplied by itself two times.

10^{2} = 10 \times 10 = 100

Similarly expanding \bold{(-2)^{2}}:

Here -2 is the base term and 2 is the exponent value. So the base term -2 is multiplied by itself two times.  

(-2)^{2} = -2 \times -2 = 4

So the equation \frac{M^{2}}{P^{2}} = \frac{10^{2}}{(-2)^{2}} becomes,

\frac{M^{2}}{P^{2}} = \frac{100}{4}

By dividing 100 by 4 , we get the result as 25

Hence the solution of \bold{\frac{M^{2}}{P^{2}}} when M = 10 and P = -2 is 25

6 0
4 years ago
Timothy runs on a treadmill at an average speed of 5 meters per second. How many minutes does it take Timothy to run 2.4 kilomet
ruslelena [56]
It will take 8 minutes.
You use a proportion 
5/1=2400/x you use 2400 because 2.4km=2400 meters and u need to use the same unit of measurement.
so cross multiplying gives you 5x=2400 which is equal to 480. BUT this is 48 seconds, and it asks you how many minutes, not seconds. So, you divide by 60 because there are 6 seconds in a minute, and you get 8.
6 0
3 years ago
The salaries of 830 lawyers were recorded and analyzed. The analyst later found that the lowest salary was incorrectly recorded
Rasek [7]

Answer:

The median (half-above and half-below) could not have changed, because "corrected value was still lower than any other salary" does not change the position of that observation (still least) in the sorted list of salaries.

HOPE THIS HELPED < 33

Step-by-step explanation:

8 0
3 years ago
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