C ( To make things simple, let's turn 80% into a fraction, 8/10. To get a common denominator let's turn 8/10 into 4/5. Since they are both of equal size, the first group would have 2/5 left-handed people and the second 1/5 left-handed people. Let's imagine that each group has 5 people in it. There would be 10 people in total. There is 1 person for each fifth so we can add now. 4 + 3 = 7 right handed people. To check, 2 + 1 = 3 and 3 + 7 = 10. so 7/10 of the class is right-handed. )
Answer:
6x2+2x+4
Step-by-step explanation:
6x^2 has no like terms
3x -x = 2x
8 - 4 = 4
6x^2 + 2x + 4
Answer:
x² - 8x - 15
Step-by-step explanation:
-4(2x + 6) + x² - 9
= -8x - 24 + x² - 9
= x² - 8x - 33
The total surface area of a cylinder is given by the formula

Given diameter, d=12meters, we will solve for radius

The height is given as 9meters
Substituting for r and h in the formula will give


Hence the surface area of the cylinder is 565.2m²
Answer:x=1
Step-by-step explanation:
y=y
y = -x + 10
y = 7x + 2
-x+10=7x+2
10=8x+2
8=8x
x=1