Answer:
31.25
Step-by-step explanation:
25/12=2.083333
15 x 2.0833333=31.24999999995
round up to get 31.25
Part a) Find the expression that gives the perimeter of ∆XYZ
we know that
Perimeter of triangle ABC is equal to
In this problem ∆ABC and ∆XYZ are similar triangles
the scale factor is equal to r
so
therefore
the answer Part a) is
The expression that gives the perimeter of ∆XYZ is 
Part b) Find the expression that gives the area of ∆XYZ
we know that
therefore
the answer Part b) is
The expression that gives the Area of ∆XYZ is 
8x - 16y = a common factor would be 8...so factor out 8
8(x - 2y)
The ratio of the number of female attendants to the number of male attendants is 21/17
<h3>Ratio</h3>
- Amount donated by female attendant = $1200
- Amount donated by male attendant = $800
- Average donation = $900
let
- number of female attendant = x
- number of male attendant = y
900 = 1200x + 800y / (x + y)
900x + 900y = 1200x + 800y
900x + 1200x = 800y + 900y
2100x = 1700y
x : y = 2100 / 1700
x : y = 21 ; 17
Learn more about ratio:
brainly.com/question/2784798
#SPJ1
Answer: 2520
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Work Shown:
P(n,r) = (n!)/((n-r)!)
P(7,5) = (7!)/((7-5)!)
P(7,5) = (7!)/(2!)
P(7,5) = (7*6*5*4*3*2*1)/(2*1)
P(7,5) = (5040)/(2)
P(7,5) = 2520
