In the 7th and 8th grade combined, there 3+5 girls = 8 girls, and 7+5 boys = 12 boys. If there are only boys and girls, then there are 12+8=20 students in all.
The fraction of girls out of the total is P = 8/20 = 2/5.
The expression (-4x + 9)^2 cannot be equal to (-4x)^2 + 9^2 because it is actually equal to the product of two factors (3 + 2sqrt x) (3- 2 sqrt x). One cannot use obviously distributive property. Hence the answer to this problem should be C. as she did not understand both perfect square trinomial and did not determine the product
Answer:
Deon spent 1/10 of an hour more on chemistry than on math
Step-by-step explanation:
Answer:
B. 360
Step-by-step explanation:
we are given
we can move 10 on right side
we cancel -1
we can rewrite right side
we can compare exponents
and we get
.............Answer
