C. 9y + 13
9y is the same as 9 times y (a variable representing a number), + 13
X =(6-√124)/4=(3-√ 31 )/2= -1.284
x =(6+√124)/4=(3+√ 31 )/2= 4.284
(2x2 - 6x) - 11 = 0
Answer:
-6
Step-by-step explanation:
On the number line, b is between -18 and 0. This means it has to be a number between those numbers.
It's not 9 because that's greater than 0
It's not 22 because that's greater than 0
It's not -34 because thats less than -18
That leaves us with -6
Answer:
the surface area of a penny = 662.81 mm²
Step-by-step explanation:
given:
A penny is a cylinder with a diameter of 19.05 millimeters
and a thickness of 1.55 millimeters.
find:
what is the surface area of a penny?
<u>surface area of a cylinder formula:</u>
As = 2 π r h + 2 π r²
let r = 19.05 / 2
r = 9.53 mm
let h = 1.55mm
plugin values into the formula:
As = 2 π (9.53) 1.55 + 2 π (9.53)²
As = 92.76 + 570.05
As = 662.81 mm²
therefore,
the surface area of a penny = 662.81 mm²
