Answer:
decay rate is -13 percent in an hour. 3 hours would be (0.87)^3 = 65.85 percent
Answer:
x= -4
Step-by-step explanation:
distribute
combine like terms
subtract 4x from both sides
subtract 8 from both sides
divide both sides by -2
Answer:
Step-by-step explanation:
So we have:
Remove all the fractions to make things simpler. To do so, we can multiply by the LCM of the denominators.
The denominators are 3 and 7.
The LCM of 3 and 7 is 21. Thus, multiply everything by 21:
Distribute:
Simplify the fractions:
Add 12x to both sides:
Subtract 9 from both sides:
Divide both sides by 26:
Reduce:
And that's our answer :)
In each case divide the price by the number of cans.
The best buy is the lowest price.
$12.53/7 = $1.79
$5.97/3 = $1.99
$7.95/5 = $1.59
$8.34/6 = $1.39
The fourth ad, $8.34 for 6 cans results in the lowest price per can, $1.39.
The fourth ad is the best buy.
Answer:
-9
Step-by-step explanation:
do distributive property first to eliminate the parenthesis.
5h + 22 - 2h = -5
combine like terms
3h + 22 = -5
move the 22 over by subtraction
3h = -27
divide
h = -9
