The number of ways of she can do it is 504 ways
<h3>What is permutation?</h3>
The formula for permutation is given as:
Permutation =
Where:
- n is the total number of objects = 9
- r is the number selected = 3
Substitute into the formula
Permutation =
P( 9, 3) =
P( 9, 3) =
P( 9, 3) = 504 ways
Thus, the number of ways of she can do it is 504 ways
Learn more about permutation here:
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I think it is -8. Subsitute the value. 2(-8) +1=-15 which is less than 0. When you plug -8 for x^2 -1 you get 64-1 which is 63. 63 is offcourse greater than 0.
An artist wants to frame a square painting with an area of 400 square inches.
(a) x is the length of one side of the painting
Area of the square formula is
side is x. so area becomes
We know Area is 400. so the equation becomes
(b) Solve the equation for x
(take square root on both sides)
When we take square root we put +-
+-20 = x
x = +20 in and x=-20in
So there are two solutions for the above equation.
(c)No. we know x is length of the side. the length cannot be negative .
So x=-20 inch is not valid
x=20 inches is our only solution.
(d)To find the length of the wood trim needed to go around the painting, we find the perimeter of the square
Perimeter = 4* side
= 4* x = 4* 20 = 80 inches
Answer:
he sold 4 boxes of cookies and 3 chocolate bars
Step-by-step explanation:
5+5+5+5 = 20 3+3+3 = 9 so add 20+9 = 29
Answer:
- 8x² + 36xy - 36y²
Step-by-step explanation:
Given
(- 2x + 6y)(4x - 6y)
Each term in the second factor is multiplied by each term in the first factor, that is
- 2x(4x - 6y) + 6y(4x - 6y) ← distribute each parenthesis
= - 8x² + 12xy + 24xy - 36y² ← collect like terms
= - 8x² + 36xy - 36y²