Im not sure if i am understanding the question correctly...
If you are asking if Jama's mom is correct, then no. she is wrong. this is because
if you take the proportion, (is/of)=(%/100) you get (x/30)=(70/100). You then solve for x which in this case would be 21 students are wearing tennis shoes.
Hope this helps.
Answer:
1/9
Step-by-step explanation:
1/9 fills faster than
1/27
1/18
Answer:

Explanation:
The given expression is:

Combine like terms

Simplify the resulting expression

Substitute x = 3 and y = -1 into the simplified expression
for the first one the answer is b. constant
and the for the second one b. term and product