Answer:
Step-by-step explanation:
Given :
l + m + n = 9
l²+ m² + n²= 31
l + m + n = 9
On squaring both sides
(l + m + n)²= 9²
(l²+m²+n²+2(lm+mn+nl) = 81
31 +2(lm+mn+nl) = 81
2(lm+mn+nl) = 81 - 31
2(lm+mn+nl) = 50
(lm+mn+nl) = 50/2
(lm+mn+nl) = 25
Hence, the value of (lm+mn+nl) = 25
1) Marnie pays $0.06 per kilowatt-hour of electricity.
2)Marnie budgeted $72 for her electricity.
3)You are supposed to find the greatest number of kilowatt-hours Marnie can use and stay within her budget of $72.
121-36=49+10+26.X is eqeal to 36
You can find 15 DVDs.
165 divided by 11 = 15
Answer:
The answer is <u>x = 65 - 60y.</u>
Step-by-step explanation
