Answer:
11
Step-by-step explanation:
Hello,
Given the original number n.
Multiply the number by 9.
Add 99.
Divide this sum by 9.
Subtract the original number, n, from the quotient.
Thank you.
So you will need to solve for x and y before evaluating 2x+y....
2x-y=9, y=2x-9 now this will make 4x^2-y^2=171 become:
4x^2-(2x-9)^2=171
4x^2-(4x^2-36x+81)=171
36x-81=171
36x=252
x=7, now we can use 2x-y=9 to solve for y...
2(7)-y=9
14-y=9
-y=-5
y=5
now we know that x=7 and y=5, 2x+y becomes:
2(7)+5
14+5
19
Answer:
Step-by-step explanation:
The square has 100 smaller parts.
92 of them are shaded, that means 92% of the square is shaded.
Answer:
20.00
Step-by-step explanation:
Divide 60 per minute its a formula.
