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Which of the following mathematical expressions is equivalent to bh /2 ?
A. b/2 × h/2
B. 2 (b × h)
C. b/2 + h/2
D. 1/2 (b × h)
E. b × 2h - ✔✔D?
Peter works 38 hours per week and earns $7.25 per hour. His employer gives him a
raise that increases his weekly gross pay to $307.80. What is the increase in Peter's
weekly gross pay?
A. $ 32.30
B. $ 34.70
C. $ 42.46
D. $275.50
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,E. $300.55 - ✔✔A. since 7.25x38=275.50. Then minus 307.80 by 275.50=32.5
Formula for Discounted Price - ✔✔=(1-%discount/100)x (original price)
Finding Length of Tape - ✔✔2(height) + 2(top+bottom)
Increase Tape Length by % Formula - ✔✔=(1+%/100)(original length)
Average Formula - ✔✔Add up all numbers, then divide by the amount of numbers. Ex:
x+y+z/3
Distance - ✔✔(rate)(time) d=rt
Dirt
Average distance - ✔✔total distance/total time
Increased Final Amount - ✔✔%increase/100xOriginal amount +original amount
1/3 (decimal) - ✔✔0.33333 or .3-^, 33.3 %
1/4 (decimal) - ✔✔0.25 or 25%
1/5 to decimal - ✔✔0.2 or 20%
1/6 (decimal) - ✔✔.16 repeating or 16.6 %
2/3 (decimal) - ✔✔0.66666
2/5 to decimal - ✔✔0.4
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, 3/4 (decimal) - ✔✔0.75
3/5 to decimal - ✔✔0.6 (non repeating)
4/5 (decimal) - ✔✔0.8
5/6 (decimal) - ✔✔0.83 repeating
4/6 (decimal) - ✔✔.666 repeating
nearest tenth - ✔✔First number after decimal
nearest hundred - ✔✔Second number after decimal
PEMDAS - ✔✔Parentheses, Exponents, Multiplication, Division, Addition, Subtraction
4x8 - ✔✔32
5x6 - ✔✔30
5x7 - ✔✔35
5x8 - ✔✔40
6x7 - ✔✔42
6x8 - ✔✔48
7x7 - ✔✔49
7x8 - ✔✔56
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