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r-ruslan [8.4K]
3 years ago
5

The number of students in a math club decreased from 15 to 11. What is the percent decrease? Round to the nearest percent.

Mathematics
1 answer:
Alinara [238K]3 years ago
4 0

Answer:

27%

Step-by-step explanation:

Decrease= 15-11

=4

Percentage=4÷15

=0.266666667

=26.667%

~27%

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PlsHurry Blanck Is 7 times as much as 4
erma4kov [3.2K]

Answer:

28

Step-by-step explanation:

7 x 4 = 28

hopefully this helps you :)

pls mark brainlest  ;)

3 0
3 years ago
If Kevin wants a 90 average in math after 5 tests and his first 4 tests are 76, 92, 89 and 97 what does he need on the fifth tes
Keith_Richards [23]
You need to understand that you're solving for the average, which you already know: 90. Since you know the values of the first three exams, and you know what your final value needs to be, just set up the problem like you would any time you're averaging something.
Solving for the average is simple:
Add up all of the exam scores and divide that number by the number of exams you took.
(87 + 88 + 92) / 3 = your average if you didn't count that fourth exam.
Since you know you have that fourth exam, just substitute it into the total value as an unknown, X:
(87 + 88 + 92 + X) / 4 = 90
Now you need to solve for X, the unknown:
87
+
88
+
92
+
X
4
(4) = 90 (4)
Multiplying for four on each side cancels out the fraction.
So now you have:
87 + 88 + 92 + X = 360
This can be simplified as:
267 + X = 360
Negating the 267 on each side will isolate the X value, and give you your final answer:
X = 93
Now that you have an answer, ask yourself, "does it make sense?"
I say that it does, because there were two tests that were below average, and one that was just slightly above average. So, it makes sense that you'd want to have a higher-ish test score on the fourth exam.
4 0
3 years ago
Read 2 more answers
Karen purchased a DVD player on sale. The original selling price was ​$171.50. The sale price was ​$145.22. What is the first st
Kaylis [27]

Answer:

15% off

Step-by-step explanation:

5 0
3 years ago
Please help!!!!! 10 Points!! (i only have 23)
Ivan
The answers are going to be: D & E

Explanation:
Any number that was multiplied by less then one is going to be your answer. :)
6 0
3 years ago
At the end of her work day, Rosa leaves her office and goes directly to her bank. On the graph that shows the locations of Rosa'
ikadub [295]
Find the distance between the point of bank and the point of office.

\sqrt{(x2 - x1)^{2}+ (y2 - y1)^{2}}
\sqrt{(-4 - (-6)^2 + (4 - (-3)^2}
\sqrt{(2)^2 + (7)^2}
\sqrt{4 + 49}
\sqrt{53}


The distance she travels is approximately 7.3 km.

Hope this helps :)
7 0
3 years ago
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