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ZanzabumX [31]
3 years ago
9

Someone please help me fast !!

Mathematics
2 answers:
Alexeev081 [22]3 years ago
7 0
Second answer is the right one
kvv77 [185]3 years ago
6 0
The second answer is correct.
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The ratio of cement : sand : aggregate in a mix of concrete is 1 : 3 : 3. Sang wants to make 112 kg of concrete. How much sand d
Kisachek [45]

Answer: 48

Step-by-step explanation:

The share of sand in the mixture is 3/7

To make 112 kgs. of concrete, he will need

3/7 x 112 = 48 units of sand

8 0
3 years ago
Read 2 more answers
Algebra.
Bad White [126]

Answer:

1 C

2 A

3 B

Hope this helps



7 0
3 years ago
The original quantity is 20 and the new quantity is 15. Adam incorrectly says the percent decrease is about ​14.29%. What is the
Yuki888 [10]

Answer: A. divided the difference of the two quantities by the sum of the two quantities.

===================================================

Explanation:

The difference of the quantities is 20-15 = 5

The sum of the quantities is 20+15 = 35

Dividing those results leads to 5/35 = 0.142857 which rounds to 0.1429

That converts to 14.29%

This is likely the path Adam took. This path is incorrect. The correct steps are shown below

---------------------

Difference = 20-15 = 5

Divide the difference over the original quantity

5/20 = 1/4 = 0.25 = 25%

We have a 25% decrease because the new quantity (15) is smaller than the old quantity (20)

----------------------

Here's another way to approach the problem

A = old value = 20

B = new value = 15

C = percent change

C = [ (B-A)/A ] * 100%

C = [ (15-20)/20 ] * 100%

C = (-5/20)*100%

C = -0.25*100%

C = -25%

The negative C value means we have a negative percent change, ie we have a percent decrease. So this is another way to get a 25% decrease.

4 0
3 years ago
Read 2 more answers
3. List all the coefficients and constants
7nadin3 [17]
The coefficient is 4
The constants are 2 and 3
5 0
3 years ago
A builder needs to tile a 7 foot by 8 foot room with one-foot square tiles. how many tiles will she need?
Diano4ka-milaya [45]
I believe that she will need 56 square tiles. You get this by doing 7 times 8 which is 56. Then, since each tile is a one-foot square tile, you would need 56 tiles to cover the whole floor. 
6 0
3 years ago
Read 2 more answers
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