Answer:
84
Step-by-step explanation:
3 times 4= 12
12 times 7= 84
Answer:
8
Step-by-step explanation:
Split up the shape into three smaller shapes: a triangle at the top, a 1 by 2 rectangle, and a triangle at the bottom left. The 1 by 2 rectangle has an area of 2. The triangle at the top has an area of (4*2)/2 = 4, and the triangle at the bottom right has an area of (2*2)/2 = 2.
Therefore, the total area of the shape is 2 + 4 + 2 = 8
Hope this helped!
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Answer: 314 mm
Step-by-step explanation:
Area of a circle is π*r^2
r is radius and π is 3.14
here the radius is 10
3.14 * 10^2 = 3.14 * 100 = 314
Answer:
Step-by-step explanation:
In equation form,
children + adults = 48 people at the library.
If the number of children is 3 times the number of adults, then in equation form:
children = adults*3
Let's call children c and adults a. Subbing the second equation into the first gives us an equation with only one unknown instead of 2.
c + a = 48 after making the substitution is
3a + a = 48 and
4a = 48 so
a = 12
There were 12 adults. If the total number of people was 48, then
48 - 12 = number of children so
c = 36
