The null hypothesis is that the mean is 83 out of 100. The alternative hypothesis is that the mean is less than 83.
Answer:
see explanation
Step-by-step explanation:
The perimeter is the length of all 6 sides of the polygon.
Note that the 2 unknown sides are
8 - 4 = 4 mm and 8 - 2 = 6 mm
Starting with the left side
Perimeter = 8 + 2 + 4 + 6 + 4 + 8 = 32 mm
The polygon can be split into 2 rectangles.
The lower rectangle with sides of 8 and 4
and the upper rectangle with sides 2 and 4
Area = (8 × 4) + (2 × 4) = 32 + 8 = 40 mm²
Answer:
D: 13b^3 - 18b^2 - 7b + 12
Step-by-step explanation:
First expand the brackets by multiplying (10b^2+7b-3) by -1
Then rearrange the terms so you can see where you have to add them together.
Then simplify
Answer:
18>-30
Step-by-step explanation:
Answer:
i think its 2, but if im wrong im sorry