I believe it’s A!!!!!!!!!!!!!!
Answer: Donna is wrong. Mean weight is 7.1kg
Step-by-step explanation:
Calculate the mean for the bricks:
4 bricks have a mean weight of 5kg = 4 * 5
5 bricks have a mean weight of 9kg = 5 * 9
1 green brick is 6kg
= (4 * 5 ) + ( 5 * 9) + 6
= 71kg
Mean = 71 / (4 + 5 + 1)
= 7.1 kg
The answer is B, 57 degrees. You can tell angle C is 57 degrees since 180-123 is 57 and both angles add up to 180 on a straight line. Then since the lines are parallel, angle a is 55 degrees because of alternate interior angle theorem. Then, a triangle’s angles add up to 180 so to figure out angle d, you do: 180- (55 + 57) which gives you 68. Since 55 + angle b + angle d = 180, you have to do 180 - (68+55) = 57 degrees. Hope this helps!
Answer:
Dimensions are 8 Inches by 14 inches by 20 inches
Step-by-step explanation:
The volume of the box is 2240. This means:
lbh = 2240
Where b is the width.
Width is two inches less than twice the height
b = 2h - 2
length is 4 inches less than 3 times the height
l = 3h - 4
Substituting these parameters into the lbh equation will yield the following:
h * (3h - 4) * (2h - 2) = 2240
h[6h^2-14h+8] = 2240
6h^3 -14h^2 + 8h - 2240= 0
Solving this cubic equation will yield one of the values to be 8. The other two values are complex numbers.
b = 2h - 2
l = 3h - 4
b = 2(8) - 2 = 14
l = 3(8) - 4 = 20
Answer:
50.4
Step-by-step explanation:
