The school store is running low on erasers for pencils. They want to order more, so they look at the prices for 4 brands. Which one is the best buy?
Brand A: 20 for $2.50
Brand B: 35 for $3.25
Brand C: 50 for $5.25
Brand D: 100 for $10.00
(1 point)
Responses
Brand A
Brand A
Brand B
Brand B
Brand C
Brand C
Brand D
Brand B
If a dozen pencils cost $1.35, what is the unit cost?(1 point)
Responses
$0.11
$0.11
$1.23
$1.23
$0.13
$0.13
$4.29
$4.29
$0.11
Find the slope of the line given the points on the graph.
(1 point)
Responses
-3
-3
3
3
6
6
13
1 third
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We need the coordinates of the two points on the graph to find the slope.
Find the slope of the line given the points on the graph.
(1 point)
0,1 -2,-5
Responses
-3
-3
3
3
6
6
13
1 third
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To find the slope of the line given the points (0,1) and (-2,-5), we will use the formula for slope, which is (y2 - y1)/(x2 - x1).
Substituting the given coordinates, we get:
Slope = (-5 - 1)/(-2 - 0)
= -6/-2
= 3
Therefore, the slope of the line is 3.
The distance traveled in a car varies directly as the amount of gasoline used. If a car travels 640 miles and uses 32 gallons of gas, find the constant of variation or miles per gallon (mpg).(1 point)
Responses
18 mpg
18 mpg
22 mpg
22 mpg
20 mpg
20 mpg
24 mpg
To find the constant of variation or miles per gallon (mpg), we need to divide the distance traveled by the amount of gasoline used.
Given that the car travels 640 miles and uses 32 gallons of gas, we can calculate the mpg as follows:
mpg = distance/gasoline used
= 640/32
= 20
Therefore, the constant of variation or miles per gallon (mpg) is 20.
In her science classroom, Mrs. Hall noticed that the lengths (in inches) and weights (in ounces) of the class's pet ferret were directly related by the equation y = kx, where x is the length and y is the weight. Use the information in the table to find k, the constant of proportionality.
Length(x) weight(y)
6 15
9 22.5
12 30
15 37.5
(1 point)
Responses
k = 2.0
k = 2.0
k = 2.5
k = 2.5
k = 1.5
k = 1.5
k = 3.0
k = 3.0
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