Answer:
≈
528cm
Step-by-step explanation:
The formula is pi multiplied by the diameter. So you multiply the radius (84) by two times. Next, you multiply 22/7 by the diameter and you will received 528cm. I hope this answers your question.
Answer:
x = 2±sqrt(11)
Step-by-step explanation:
x^2 -4x - 7 =0
Add 7 to each side
x^2 -4x -7+7 =0+7
x^2 -4x =7
To complete the square take the coefficient of the x term and divide by 2 and then square it. Add it to both sides
-4 /2 = -2 then square
(-2)^2 = 4
Add 4 to both sides
x^2 -4x+4 =7+4
x^2 -4x+4 = 11
Factor the left side into (x-b/2)^2
(x-2)^2 =11
Take the square root of each side
sqrt((x-2)^2) =±sqrt(11)
x-2 = ±sqrt(11)
Add to to each side
x-2+2 = 2±sqrt(11)
x = 2±sqrt(11)
Answer:
1
Step-by-step explanation:
You must notice that y = x is parallel with them.
Answer:
-62
Step-by-step explanation:
using bodmas (brackets,other,division, multiplication, addition and subtraction)
starting with brackets(6-68+9)
68+9 because adding comes before subtracting is 77
now 6-77 is -71
now multiplication 1-2(-71)
which is -1(-71) which is 71
now the 9 - 71 which is -62
