Answer:
D
Step-by-step explanation:
−6−(−5)
=−6−(−5)
=−6+5
=−1
4(x-5)+2
__
4x. _
20 _
2
Your answer is 4x-5+2
X=number of girls.
y=number of boys.
We can suggest this system of equations:
2/7 x=3/5 y ⇒10x=21y ⇒x=21/10 y
y=x-165
We can solve this problem by substitution method:
x=(21/10)(x-165)
10x=21x-3465
10x-21x=-3465
-11x=-3465
x=-3465 /-11=315
y=x-165=315-165=150
Number of children=number of girls + number of boys
Number of children=315 +150=465
Answer: there were 465 children at the festival.
Answer:
regular price is $22.50
Step-by-step explanation: 22.50*.20=4.5 (discount)
