Algebra
Simplify 9x - 4x
5x
What is the complementary angle of 30?
Find the 5th term of this sequence: 7, 14, 21, 28
35
Is 37 a prime number?
Yes
35
x = 6
What is the perimeter of a rectangle with 9cm width, and 4cm height?
26cm
Find the 5th term of this sequence: 3, 9, 27, 81
243
15
The scientists who quit Prayoga's experiment discover a remote control that has 8 buttons. 7/8 of these buttons blow up Prayoga's lab, but 1/8 of these buttons blow up the remote control. Write the chances of the scientists blowing up Prayoga's lab, in terms of decimal.
0.875
Expand; 2(x + 5) + 3x
5x + 10
A right triangles adjacent side is 12, and its height is 5. What is the length of its hypotenuse?
13
What is the LCM (lowest common multiple) of 15 and 20?
60
After Prayoga's lab were blown up, people speculate that there is a 50% chance of them surviving. Write this chance in terms of fraction.
1/2
5x + 3 = 2x + 24. What is the value of x?
x = 7
Reflect the coordinates (5, -2) across the x axis.
(5, 2)
Find the 8th term of this sequence: 1, 4, 9, 16, 25, 36
64
Factorize 420 using prime numbers
2² × 3 × 5 × 7
5 of the survivors of a lab explosion decide to rebel against the terrorists, by blowing up all their bases. Each survivor blew up 6, 10, 14, 18, and 22 bases respectively. Calculate on average how many bases did each survivor blow up.
14
2x + y = 14; x - y = 1. What is the value of x and y?
x = 5, y = 4
A triangle has sides with length 7, 24, and 25. Is it a right triangle?
Yes
What is the nth term of this sequence: 3, 8, 15, 24, 35
n2 + 2n
12
An organization sees the survivor-turned-arson group and decides to put a bounty of Rp 500,000 on the group. Unfortunately, one of the members of the group already turned themselves in, which in return lowers the original bounty by 18%. What is the bounty now?
Rp410,000