Since the base is 3 inches and the height is 4 inches, as well as the area of a triangle being base*height/2, we get 3*4/2=6 in. for each triangle. Since we need 20 pieces for each puzzle, we multiply 6 by 20 to get 120. In addition, since 80 puzzles are needed, with 20 pieces for each puzzle, we have 120 inches for each puzzle and 120*80 = 9600 square inches of wood used
Answer:
A
Step-by-step explanation:
The "mean" is the average score. An average is found by adding all of the values and dividing by the number of values added (find the mean of 2,4,6. 2+4+6=12, 12/3=4, mean=4)
682+601+744+674+701+790+676+638+773=6279, 6279/9=(697 and 2/3) rounded=698. A
(8/9)^2= 8/9 * 8/9
8*8=64
9*9=81
Final answer: 64/81
Answer:
y= -21x/19 x≠0
Step-by-step explanation:
(I just reviewed this!) Combined like terms and used Pemdas for Order of Operations. Canceled out -21x with -21 and we know that x is not equal to 0. If you need more help there are some sites like Khan Academy.
Answer:
56π
Step-by-step explanation:
1. Approach
To find the radius of a circle, use the formula;
π
To find the area of the shaded region, find the area of the larger circle, and then subtract the area of the smaller circle from it.
It is given that the larger circle has a radius of 9, and the smaller has a radius of 5.
2. Area of the larger circle
π
Substitute in known value (use 3.14 for π)
A = 254.47
3. Area of the smaller circle
π
Substitute in known value (use 3.14 for π)
A = 78.54
4. Area of the shaded region
Subtract the area of the smaller circle from the area of the larger circle;
254.47 - 78.54 = 175.93
~ 56π