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Eddi Din [679]
3 years ago
5

90% of what number is 57

Mathematics
1 answer:
aliina [53]3 years ago
4 0
To solve this, set up the equation, 90% of x being .9*x=57. Then, solve for x, x=57/.9=6 \frac{1}{3}=6.333
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Step-by-step explanation:


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Please help!!!!!!! How many inches would a point on the outer edge of the large gear travel in a 150º rotation? (The gear has a
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In a full rotation, 360°, a point on the edge of a gear would travel a distance equal to its circumference.  The circumference of a circle is:

C=2πr, and since we are only traveling 150°, we need to set up an appropriate ratio for circumference to the distance the point travels:

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4 0
3 years ago
2/3 / (-9/4)<br><br> 2/3 divided by (-9/4)
Bezzdna [24]

♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️

\frac{2}{3}  \div ( -  \frac{9}{4} ) =  \\

\frac{2}{3}  \times( -   \frac{4}{9}) =  \\

-  \frac{2 \times 4}{3 \times 9}  =  -  \frac{8}{27}  =  -  ({ \frac{2}{3} })^{3}  \\

♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️

8 0
3 years ago
A math test is worth 100 points and has 38 problems. Each problem is worth either 5 points or 2 points. How many problems of eac
Natasha_Volkova [10]
Let x be the number of 5 points question.
Let y be the number of 2 points question.

Total number of questions is 38
x + y = 38 

Total points is 100
5x + 2y = 100

x + y = 38 ------------- (1)
5x + 2y = 100 ---------(2)

From (1):
x + y = 38
x = 38 - y -------------- sub into (2)
5(38 - y) + 2y = 100
190 - 5y + 2y = 100
3y = 90
y = 30 ------------------ sub into (1)
x + 30 = 38
x = 38 - 30
x = 8

There are 8 5-point questions and 30 2-point questions
5 0
4 years ago
Read 2 more answers
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