Simplify.
15^2
-30
225
-225
30
(-19)^2
361
-361
-38
38
12^2
24
144
6
14
4\times 3.5 - 6 \div 2
5
-5
11
4
Simplify. Use 3.14 for \pi.
2\pi (3)^2
37.68
56.52
18.84
354.95
\sqrt{200}
20
10
10\sqrt{2}
2\sqrt{10}
Evaluate the expression for x=2 and y=-4.
-4x+4y
-4
-14
-24
(2x-y)^2
0
64
-64
Evaluate the expression for a=7 and b=3.
\sqrt{(20-a)^{2}-(b+2)^{2}}
2\sqrt2
12
3
|-15-10|
-25
25
|-11|-|-2|
-13
-9
13
9
9|-1-9|
-90
90
-10
Solve the equation.
\frac{2p}{4}+25=29
108
8
2(x+10)+4=5x
7
2
