1. Let the shorter piece be x in. long
the longer piece will be x + 13 in. long
and the two pieces add up to be 47 in., so
x + ( x + 13 ) = 47
2x = 47 - 13
2x = 34
x = 17
the longer piece is x + 13 in. long,, or 17 + 13 = 30 in. long
2. number of dimes: x
number of quarters: y
x + y = 27....(1)
10x + 25y = 405...(2)
(1)*10: 10x + 10y = 270....(3)
(2) - (3):15y = 135
y = 9
plug y = 9 into (1), you will find that x = 18
so 18 dimes, 9 quarters
Answer: 48% compared to 18%
<u>Step-by-step explanation:</u>
The first item to be compared is Students:
Students-Small divided by Students-Total
48 ÷ 100 = 48%
The second item to be compared is Adults:
Adults-Small divided by Adults-Total
18 ÷ 100 = 18%
Answer:
Step-by-step explanation:
<span>11%
The main issue when determining the percent error in a measure measurement is determine what to divide by. Do you divide the error by the measured value, or do you divide by the correct value? The convention is to divide by the correct value. So take the measured value minus the correct value and then divide by the correct value to get the percent error. So:
(7.2 - 6.5)/6.5 = 0.7/6.5 = 0.107692308 = 11% error</span>
Answer: y=5x/2 - 2.5
Step-by-step explanation:
m=(y2-y1)/(x2-x1)
m=(-2.5-2.5)/(0-2)
m=-5/(-2)
m=5/2
y=mx+b
y=5x/2 + b
-2.5=5(0)/2 + b
-2.5=0 + b
b=-2.5
y=5x/2 - 2.5