Answer:
Step-by-step explanation:
The net has a rectangle at the center. The area of the rectangle is expressed as
Area = length × width
Area of the rectangle = 10 × 4 = 40 inches²
The formula for determining the area of each triangular face is expressed as
Area = 1/2 × base × height
The area of each face of the triangle that has a base of 10 inches and a height of 5 inches is
Area = 1/2 × 10 × 5 = 25 inches²
The surface area of the rectangular pyramid is
Area of rectangle at the center + area of the four triangular faces
Therefore,
The surface area of the rectangular pyramid =
40 + 2(25) + 2(13.6) = 117.2 inches²
If Christina has 20 more than Marissa, then you can subtract 20 from the amount Christina has.
$100-$20 = $80
Marissa has $80
Answer: x=-6
Steps
distribute
2-3(x+4)=8
2-3x-12=8
Subtract the numbers
2-3x-12=8
-10-3x=8
Rearrange terms
-10-3x=8
-3x-10=8
Add ten to both sides
-3x-10=8
-3x-10+10=8+10
Simplify
(add the numbers)
-3x=18
Divide both sides by the same factor
-3x=10
(Write this part in a fraction)
-3x/-3 = 18/-3
Last step simplify
Cancel terms that are in both the numerator and denominator
Divide the numbers
X=18/-3 (18 over -3 write it as a fraction)
So that leaves your answer to
X=-6
9514 1404 393
Answer:
- 1/3 hour per mile
- 3 miles per hour
Step-by-step explanation:
Time per mile can be found by dividing hours by miles:
(1/8 h)/(3/8 mi) = 1/3 h/mi
It will take him 1/3 hour to run 1 mile.
__
Miles per hour can be found by dividing miles by hours (or by finding the reciprocal of the above value):
(3/8 mi)/(1/8 h) = 3/1 mi/h = 3 mi/h
He could run 3 miles in one hour.