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noname [10]
3 years ago
5

Mrs.Brown gives two tests to her class. 30% of the class passed both tests and 45% of the class passed the first test. What perc

ent passed the second test given that they passed the first test?
Mathematics
1 answer:
Nady [450]3 years ago
4 0

Answer:

15%

30 percent passed BOTH tests.....Only 15% passed ONLY first test

30/(30+15) = 67% of those who passed the first test ALSO passed the second test.

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It takes 4/7 of an hour to paint 2/7 of a room. How long does it take to paint one room ?
Sidana [21]

Answer:

2 Hours

Step-by-step explanation:

4/7 of an hour = 34.3 minutes.

34.3 minutes per 2/7

4/7 = 68.6 OR 1 hour 8 minutes.

6/7 = 102.9 OR 1 hour 42 minutes.

Then add half of 34.3 (17.15)

7/7 = 120.05. = 2 hours 0.5 seconds.

3 0
3 years ago
The multiplication table below can be used to find equivalent ratios.
Liula [17]

Answer:

c

Step-by-step explanation:

3/24 = 3/3*8 = 1/8

24/32 = 4*6/4*8 = 6/8

32/24 = 4*8/4*6 = 8/6

24/3 = 3*8/3 = 8/1 = 8

5 0
2 years ago
Read 2 more answers
Please answer it correctly and I'll mark it​
kirza4 [7]

Answer:

Step-by-step explanation:

1) a very poor question indeed. It has at least two possible solutions

c = 3x + 2                                     or     c = 3(x + 2)

when x = 2

c = 3(2) + 2 = 8                           or      c = 3(2 + 2) = 12                  

when x = 5

c = 3(5) + 2 = 17                          or       c = 3(5 + 2) = 21

2)

y = x + 2

when x = 2

y = 2 + 2 = 4

when x = 5

y = 5 + 2 = 7

8 0
2 years ago
Find the slope of the treadmill shown to the right
Nata [24]
There is no treadmill
6 0
3 years ago
21 and 22 are complementary angles. The measure of Z1 is 60°.
levacccp [35]

Answer:

  15

Step-by-step explanation:

We assume you mean that ...

  ∠1 + ∠2 = 90°

  60° + 2x° = 90° . . . . given values for the angles

  2x° = 30° . . . . . . . . . .subtract 60°

  x = 15

4 0
3 years ago
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