Advanced Arithmatic
(12² − 8²)
80
3x+2=5x−8
x=5
Mean of: 3, 7, 10
20/3
A rectangle has perimeter 30ft and width 5ft. Find length.
The length is 10ft
2, 6, 18, 54, ___
162
(5³ − 3³)
98
2(3x−4)+5=3(x+2)
x=3
Median of:
2, 5, 8, 11
6.5
Area of circle radius 6
36π or 113.1
1, 4, 9, 16, 25, ___
36
(2⁴)(3²)
144
(x-2)/3 = (x+4)/5
x=11
Mean is 8 for numbers:
2, 6, x
x = 16
Right triangle legs 8in and 15in. Hypotenuse?
17in
2, 5, 11, 23, 47, ___
95
(7² − 5²) ÷ 2
12
2x+3(x−4)=5(2x−7)
x = 23/5
Numbers have mean 10:
4, 8, 12, x
x = 16
Triangle sides 7in, 24in, 25in. Area?
(Right triangle)
84in
1, 1, 2, 3, 5, 8, 13, ___
21
Find (1+2+3+...+20)
210
(2x−1)/3+(x+4)/2=(5x)/6
x = −5
Mean of 5 numbers is 12.
Four numbers are 4, 8, 15, 13. Find fifth.
x = 20
A square has diagonal 10in. Find area.
50in
1, 3, 6, 10, 15, ___
21