we know that
step 1
multiply
by 
so

step 2
Divide numerator and denominator by 

therefore
the answer is

Answer:
X=75 y=90
Step-by-step explanation:
180-105=75
X=75
180-90=90
Y=90
The first equation, make the y as the subject. y = 3 + 5x, then substitute y in the second equation and you will get the value of x. then, substitute the x in the first equation (y = 3 + 5x)
Answer:
B
Step-by-step explanation:
Answer:
7 more students need to sign up.
Step-by-step explanation:
if you subtract the number of students needed by the number of students you have, you get 7 (30-23)