Boys:12 girls:13 the average class has about 20 students 12 + 13 equals 25
Using proportions, it is found that the total amount of cement, sand, and gavel required is of 55.2 cubic yards.
<h3>What is a proportion?</h3>
A proportion is a fraction of a total amount, and the measures are related using a rule of three. Due to this, relations between variables, either direct(when both increase or both decrease) or inverse proportional(when one increases and the other decreases, or vice versa), can be built to find the desired measures in the problem, or equations to find these measures.
The decimal equivalent to the mixed number 1 1/2 is given by:
1 + 1/2 = 1 + 0.5 = 1.5.
1.5 times 36.8 cubic yards is:
1.5 x 36.8 = 55.2.
The total amount of cement, sand, and gavel required is of 55.2 cubic yards.
More can be learned about proportions at brainly.com/question/24372153
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Answer:
30
Step-by-step explanation:
ten times less means divide so 300 divided by 10 is 30. To check the answer you just have to multiply 30 by 10 which gets you 300
Answer:
2
+ -2 = 0
Step-by-step explanation:
1st step convert into improper fraction:
===> 2 + -2
===> 
+ 
2nd step now adding the numbers:
( Plus sign and minus sign multiplies and hence the plus sign changes to minus)
===> 
Therefore the sum of 2 + -2 = 0
Step-by-step explanation:
area of rectangle = height × width
area = c × (c^2 + 4c + 3)
= c^3 + 4c^2 + 3c
