Answer:
Step-by-step explanation:
To do this, identify a, b, and c of the quadratic.
a = 1, b = 20, c = |-36|
Find a*c. That's 36. Now find the factors of 36 and the 2 factors that can combine to give you b, which is 20, are the ones we want.
36: 1, 36
2, 18
3, 12
4, 9
6, 6
The ones that combine to give you 20 are 2, 18. Both positive. Therefore,
is how you begin to factor. Factoring by grouping is the way to go.
Factor out what you can from each set of parenthesis:
x(x + 18) + 2(x + 18)
What's common now is what's inside the parenthesis, so that gets factored out:
(x + 18)(x + 2)
That's factored completely!
In this problem, the shape of the sail is equilateral
triangle. You are given that the measurement of each side is x – 10 units. The perimeter
is 63 units. You have to formulate an equation to find the value of x. The
formula of the perimeter is to get the sum of the measurements of the three
sides of the triangle.
x – 10 + x – 10 + x – 10 = 63
3x – 30 = 63
3x = 63 + 30
3x = 93
x = 31
Therefore, the value of x is 31 and the measurement of each
sides is 21 units.
Answer:
Step-by-step explanation:
3m=-3
m=1
Answer:
y= -11
Step-by-step explanation:
After rearranging equation 2, we get x= y+3/2
Sub it into equation 1
y= 3(y+3/2) + 1
y= 3y+9/2 + 1
y= 3y + 11 / 2
2y = 3y + 11
-y = 11
y = -11
