First you find 80% of 90. Set up the proportion:
80 X
—— = —-
100 90
I’m simplifying the 80/100 so it’ll be easier to solve:
4 X
— = —-
5 90
Then cross multiply:
4(90) = 5x
360 = 5x
x = 72
So 80% of 90 is 72. (Or you could have multiplied 90 by 0.8 as a shortcut). Now you find 15% of 72. You can either multiply 72 by 0.15 or set up the proportion like this:
15 X
—— = —-
100 72
Cross multiply and solve. You should get 10.8
Answer:
y = 152
Step-by-step explanation:
The chord- chord angle x is half the sum of the arcs intercepted by the angle and its vertical angle, that is
(y + z) = 83 ( multiply both sides by 2 to clear the fraction )
y + z = 166
y + 14 = 166 ( subtract 14 from both sides )
y = 152
Answer:
1
Step-by-step explanation:
He only has 1 wetsuit and 1 surfboard.
Answer:
x = 32
Step-by-step explanation:
Step 1: Simplify both sides of the equation.
x
/2 −7=9
1
/2
x + (−7) = 9
1
/2
x − 7 = 9
Step 2: Add 7 to both sides.
1
/2x − 7 + 7 = 9 + 7
1
/2
x = 16
Step 3: Multiply both sides by 2.
2*(
1
/2
x) = (2) * (16)
x = 32
John would e 24 and mark would be 12
