Answer:
x = ± 7
|-7|-2=5
|7|-2=5
± means positive or negative
Step-by-step explanation:
|x|-2=5
Get x by itself by adding 2 to both sides.
x - 2 + 2= 5 + 2
-2 + 2 cancels out
x = 5 + 2
x = 7
Absolute value is how far a number is from 0.
x can be either positive or negative.
12h + 20t = income
1.5(h + t) + 7h + 9t + 500 = expenses
12h + 20t - 1.5(h + t) + 7h + 9t + 500 > 0
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6 pennies, 12 nickels, 8 dimes, 4 quarters = 30 coins
a) add the probability for drawing a dime and drawing a quarter together:
12/30 + 4/30 = 16/30 = 8/15
The probability is 8/15 or 53%
b) multiply the probability for drawing a penny and drawing a nickel:
6/30 x 12/30 = 72/900 = 2/25
The probability is 2/25 or 8%
c) multiply the probability for drawing quarters but take away one of the total coins and the amount of quarters each time:
4/30 x 3/29 x 2/28 = 24/24360 = 1/1015
The probability is 1/1015 or 0.099%