6:15 to 7:15 = $12 for the hour
7:15 to 7:45 Is a half hour = $6
So total $12 + $6 = $18
Answer:
<h2>823.7 m²</h2>
Step-by-step explanation:
If a figure A and a figure B are similar, then
(*)
<em>k</em><em> - similarity scale</em>
<em />
Calculate the similarity scale:
We have the surface area of the smaller prism 572 m².
Substitute to the formula (*):
Answer: Choice B
rose bush: $10, shrub: $4
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Work Shown:
x = cost for one rose bush
y = cost for one shrub
Rob's equation: 8x+5y = 100
Amy's equation: 8x+8y = 112
Subtract the equations straight down (match terms)
8x - 8x = 0x = 0, x terms go away
5y-8y = -3y
100-112 = -12
After those three subtractions, we end up with this new equation: -3y = -12
That equation solves to y = 4 when you divide both sides by -3
Use this value of y to find x
8x+5y = 100
8x+5(4) = 100 ... replace y with 4
8x+20 = 100
8x+20-20 = 100-20 .... subtract 20 from both sides
8x = 80
8x/8 = 80/8 ... divide both sides by 8
x = 10
We end up with x = 10 and y = 4 pairing up. The two equations, when graphed, cross at the location (10,4). One rose bush costs $10 and one shrub costs $4.
18 will divide into both 36 and 90 , but so 18 is the GCF
