Converting
Convert into a fraction:
0.45
45/100
= 9/20
Simplify this fraction:
20/70
2/7
Expand:
2(5x + 7)
10x + 14
Factor:
2x + 6
2(x + 3)
Solve:
-5.8 + 3
2.3
Convert into a decimal:
5/2
5/2 = 2 1/2 = 2.5
Simplify this fraction:
35/63
Divide both sides by 7
= 5/9
Expand and combine:
3(4x + 6) + 3
12x + 18 + 3
= 12x + 21
Factor:
2x + 6y + 2
2(x + 3y + 1)
Solve:
-3.4 - 0.5
-3.4 + (-0.5)
= -3.9
Convert into a fraction:
2.15
215/100 = 43/20
Combine and simplify:
4.8x + 3/2x
4.8x + 1.5x
= 6.3x
0.2(5h + 1)
1.0h + 0.2
Factor:
-x - 3
-x + (-3)
-1(x + 3)
Rewrite this expression using invisible math and KCF:
4x - 3 - 6x - 7
4x + (-3) + (-6x) + (-7)
Convert into a decimal:
9/24
9/24 = 3/8
3/8 = 0.375
Combine and simplify:
4a + 2 - 3a - 5
4a + 2 + (-3a) + (-5)
= 4a + (-3a) + 2 + (-5)
= 1a + (-3), or just 'a - 3'
1/3(6x + 15)
2x + 5
Factor:
4a + 12b - 20c
4(1a + 3b - 5c)
In 1954, gold was priced at '0.5x + 120' dollars per ounce. In 1987, that price tripled, and then doubled in 1992. What expression models the price of gold in 1992?
2 * 3(0.4 + 120)
= 6(0.4 + 120)
Solve (Show your answer as a fraction):
2/3 + 0.5 =
2/3 + 1/2 = 4/6 + 3/6 = 7/6
Combine:
0.6x + 3 - 1/4x
0.6x + 3 - 0.25x
= 0.35x + 3
Distribute:
0.5(1/4 - 8x)
1/2(1/4 - 8x)
1/8 - 4x
Factor:
-4x - 12
-4(x + 3)
The width of a rectangle is 3x inches wide. The length of the rectangle is 2 feet longer than the width. In terms of 'x', what is the perimeter?
P = 2L + 2W, where W = 3x; L = 3x + 2
P = 2(3x + 2) + 2(3x)
= 6x + 4 + 6x
= 12x + 4