There are 20 boys in the class. The ratio is 4:3 so that means 4 out of 7 are boys and 3 out of 7 are girls. Divide 35 by 7 and you get 5. 5 times 4 is 20. 5 times 3 is 15. add them together and you have 35 students in total. So 20 students are boys and 15 students are girls.
Answer:
C. 
Step-by-step explanation:
Given
Required
Find the expression where x - 2
Substitute 2 for x
From law of indices which states
So, the expression becomes
Expand the denominator
Hence, is 
when x = 2
Answer:
3 + b
Step-by-step explanation:
Hope this helped
Answer:
4xy
Step-by-step explanation:
2 x 2 = 4, then just plop the x and y down, and there's your answer
Answer:
112
Step-by-step explanation:
