Answer: Choice B) The expression (10-2x)(30-2x)x represents the volume of the box
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The original width is 10 inches. The width reduces to 10-2x inches after we cut off the top two corners of the rectangle. We can think of it as taking 10 and subtracting off two copies of x like so: 10-x-x = 10-2x
Similarly, the length goes from 30 inches to 30-2x inches. This time we're taking off the top and bottom corners (focus on either side it doesn't matter).
The height of the box is x inches due to this portion being folded up.
Volume of box = (width)*(length)*(height)
Volume of box = (10-2x)(30-2x)x
Note: the units for the answer are in cubic inches which can be written as "in^3" (inches cubed).
Not exactly sure but I think it's false hope this helps
Answer:
20-8. 3. 4x+(5-3y), when r = 5 and y=-1. 415)+(5-3(-1). 20+ (5+3). 4. -7x-(-4x² ... 3. 3(3x - 1)-11x-1. 9X-3-11X-1. 4. -2(x - 5) +3(-4-). -2x+10-12-3x. [-5x-2. 5. 4-2(x +5)+3x(x - 2). H-2X-10+3x2-6X. [3x²8x-61. 6. 15-6-3)+4(x-3). 15-X+2+4x-12. 3x + 5 ... Objective 2: To find the slope when given an equation of a line.
Step-by-step explanation:
Answer:
The mean of the total repair time is 150 minutes.
The variance of the total repair time is 725 minutes^2.
Step-by-step explanation:
To solve this problem, we have to use the properties of the mean and the variance. Our random variable is the sum of 3 normal variables.
In the case, for the mean, we have that the mean of the sum of 3 normal variables is equal to the sum of the mean of the 3 variables:
For the variance, we apply the property for the sum of independent variables (the correlation between the variables is 0):
<span>0.46428571428 you have to know how to add and subtracts fractions
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