Let Sydney's age be x
Christine's age is 2x
Sum of their age is 54
x + 2x = 54
3x = 54
x = 18
Sydney is 18 years old.
The answer to this solution:
1.75 x -1/5
= -0.35
Just calculate second term - first term = -4 - (-15)
Soo we just need to make these into fractions
1 x
------------ ---------------
15,000 300,000
all we need to do is figure out what we multiplied by 15,000 to get 300,000 all we have to do is divide 300,000 by 15,000. here is the math:)
300,000/15,000 = 20
so we got 20!!
just multiply that by the 1 in the first fraction to get x in the second fraction:)
your answer: B 20
Given:
radius = 30 cm
π = 3.14
Find: Area of the top surface of a circular manhole cover.
Area of a circle = π r²
Area of a circle = 3.14 * (30cm)²
= 3.14 * 900 cm²
Area of a circle = 2,826 cm²
The area of the top surface of a circular manhole cover is 2,826 cm²
