Answer:
56n - 35
Step-by-step explanation:
6n + 5(10n - 7) ← multiply each term in the parenthesis by 5
= 6n + 50n - 35 ← collect like terms
= 56n - 35
Answer:
The radii of the circles are 12 cm and 7cm.
Step-by-step explanation:
Let the radii of the circles be 
Given:
Sum of circumference of two circles= 38π cm
Formula for circumference of a circle with radius r = 2πr
------------1
Sum of areas of two circles= 193π cm²
Area of circle with radius r = πr²
-------2
Substituting r2 = 19 - r1 in equation 2 we get:
Then r2 = 19 - r1
The <em><u>correct answer</u></em> is:
A) 300-70h = 30
Explanation:
The variable h represents the number of hours.
The distance between Mobile and Orlando is 300 km; the bus is traveling at 70 km/h, and for h hours, this gives us the expression 70h for the distance the bus travels.
300-70h gives us the difference between the total distance between the cities and the distance the bus has traveled. Since the bus is 30 km from Orlando, there will be 30 km left; this gives us 300-70h = 30.
Answer:
50.24
Step-by-step explanation:
Area = r^2 x 3.14 (pi)
Radius = 8 ÷ 2 = 4
4² = 16
16 x 3.14 = 50.24
Area = 50.24 cm ²
Answer:
x = -3
Step-by-step explanation:
-5x + 32 = 47
-5x + 32 - 32 = 47 - 32
-5x = 15
-5x / -5 = 15 / -5
x = -3
