Answer:
Step-by-step explanation:
shirt = x, pants: y
Katie equation: 3x + 2y = 80, Erin equation: 3x + 4y = 116
3x + 2y = 80
3x = 80 - 2y
x = 80/3 - 2y/3
3(80/3 - 2y/3) + 4y = 116
80 - 2y + 4y = 116
80 + 2y + 116
2y = 36
y = 18, pants cost $18
3x + 4(18) = 116
3x + 72 = 116
3x = 44
x = 14.66... (66 is repeating), shirts cost $14.66
check work:
Katie: 3(14.66) + 2(18) = 79.98 which is roughly 80.
Answer:
Step-by-step explanation:
let V be the vector.
V=8i-6j
|V|=√(8²+(-6)²)=√(64+36)=√(100)=10
Answer:
75 mph
Step-by-step explanation:
In this kind of problem, "per" means "divided by". To find miles per hour, compute <em>miles divided by hours</em>:
(60 mi)/(4/5 h) = (60×5/4) mi/h = 75 mi/h
Nellie is going 75 miles per hour.
Answer:
N+10=46
Step-by-step explanation:
This is the translateion of the worded problem.
Step-by-step explanation:
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