Answer:
$42.20?
Step-by-step explanation:
Answer:
b = $423.25
Step-by-step explanation:
cost of car rent per day = $25
Cost of GPS rent per day = $12.95
Cost of gas per gallon= $4.30
A car has 19 gallons and a GPS
The cost of gas for 19 gallons = 4.30 * 19
= $81.70
Total bill = b
Number of days = d
b = (25 + 12.95)d + 4.30*19
b = 37.95d + 81.70
When d = 9 days,
b = 37.95(9) + 81.70
b = 341.55 + 81.70
b = $423.25
Answer:
I don't know this one
Step-by-step explanation:
the weight of the substance after 28 years is 8 grams.
<h3>How to determine the amount</h3>
We have that the half life of a substance is defined as the time required for the substance to decrease by half
The formula for calculating the half - life of a material is given as;
Where
- N(t) is final amount
- No is the initial amount = 128 grams
- t1/2 is the half life = 7 years
- t is the time elapsed = 28 years
Substitute into the formula
N(t) = 128 × (0. 5) ^28/ 7
N (t) = 128 × ( 0. 5) ^ 4
N(t) = 128 × 0. 0625
N(t) = 8 grams
Thus, the weight of the substance after 28 years is 8 grams.
Learn more about half life here:
brainly.com/question/26148784
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All of these only require a single operation before you get x alone. for example:
x - 2 = 6
compared with
2x = 6
for the first one, you add two and get x = 8. for the second one, you divide by 2 and get x = 3. they're both a single step, as the name "one-step" equations tells you, and you only have to divide, multiply, add, or subtract one value.
