Answer:
True
Step-by-step explanation:
after cross multiplication
Both will be 5a=2b
Answer:
30 girls
Step-by-step explanation:
40÷8=5 5×6=30
Answer:
10
Step-by-step explanation:
x(x+80) = 30²
x²+80x=900
x²+80x-900=0
(x+90)(x-10) = 0
x= -90 or x= 10
x = 10 is the answer