Answer:
multiply one or both of the equations until a variable can cancel out
Answer:
The sidewalk moves at 0.5 ft/sec
Josie's speed walking on a non-moving ground is 3.5ft/sec
Step-by-step explanation:
Let x represent the speed of the side walk and y represent her walking speed
It takes Jason's 8-year-old daughter Josie 44 sec to travel 176 ft walking with the sidewalk
Distance = speed × time
176 = (x+y)×44
44x+44y = 176
x+y = 4 .......1
It takes her 7 sec to walk 21 ft against the moving sidewalk in the opposite direction).
21 = (y-x)7
7y - 7x = 21
y - x = 3 ......2
Add equation 1 to 2
2y = 7
y = 3.5 ft/sec
From equation 1
x + y = 4
x = 4 - 3.5 = 0.5
x = 0.5 ft/sec
The sidewalk moves at 0.5 ft/sec
Josie's speed walking on a non-moving ground is 3.5ft/sec
Step-by-step explanation:
2(3x-5)=5x-3
6x -10 =5x -3
x=7
Answer:
≈ 25 in²
Step-by-step explanation:
The general formula for the area of a circle is:
A=πr²
A = (3.14)(8²)
Since the size of the pizza is 16 inches across, the radius is half of that, or 16÷2 = 8 inches.
A ≈ 201 in²
Since there 8 slices of pizza, you can take the total area and divide by 8:
201 ÷ 8 ≈ 25 in²
ANSWER: x=12
EXPLANATION:
9+x/6=11
(54+x)/6=11 (finding common denominator)
x/6=11-54/6 (rearranging terms)
x/6=(66-54)/6 (finding common denominator so 6 gets cancelled from both the sides)
x=12
