2n^2-8n=9
divide by 2
2(n^2-4n) =9
add (4/2)^2 =4 to each side completing the square
(n^2-4n+4 ) =9/2+4
(n-2)^2 = 9/2+8/2
(n-2)^2 =17/2
take the square root of each side
n-2 = +-sqrt(17/2)
add 2 to each side
n = 2+- sqrt (17/2)
Answer:2+ sqrt (17/2),2- sqrt (17/2)
Answer:
b = quantity of boards purchased
p = quantity of posts purchased
equation: 4b + 6p = 58
Step-by-step explanation:
Answer is Option B = 5/7
Explanation:
A scale factor is a number which scales, or multiplies, some quantity. In the equation y = Kx, K is the scale factor for x. K is also the coefficient of x, and may be called the constant of proportionality of y to x.
For big pictures or maps, images should be drawn without affecting the shape in a small paper. Hence dimension of x is reduced to y with constant proporiton k which is scale factor
Here we find that original length of PC = 21
In image P'C = 15
Hence scale factor=15/21 = 5/7
She earns $9/hour. If you add up 2.5 and 4.5, you would get 7. Now you just need to divide. 54/7=9.
