Answer:
Step-by-step explanation:
Given
Required
Determine
Open bracket
Equate the equation to 0
Express 3 as 1 + 1 + 1
Collect like terms
Group each terms
Factorize (starting with the first bracket)
Express 0 as 0 + 0 + 0
By comparison
Solving for
Take square root of both sides
Add 1 to both sides
Solving for
Take square root of both sides
Subtract 1 from both sides
Solving for
Take square root of both sides
Subtract 1 from both sides
Substitute the values of a, b and c in
Answer:
16.9 m
Step-by-step explanation:
Start with a half a circle. The central angle of a semicircle is 180 deg.
Now subtract 21 deg on each side.
180 - 21 - 21 = 138
The central angle is 138 deg.
The radius is 7 m.
Now we use the formula for the length of an arc of a circle given the radius of the circle and the central angle of the arc.
Answer:
y + x = 7
Step-by-step explanation:
Standard form should be
y - 9 = -(x+2)
y = -x -2 +9
y + x = 7
The answer is 81.1 because since the 9 place value above 5, you round the number in front of it to 1. so the answer is 81.1. I hope that helps.