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elena55 [62]
3 years ago
5

A hot air balloon is cruising at an altitude of 120 meters above the ground when it begins its descent. The balloon descends at

a rate of 4.5 meters per minute. Explain how you would set up an equation to model when the balloon will reach an altitude of 75 meters above the ground. Then solve the equation and check your solution.
Mathematics
1 answer:
Gekata [30.6K]3 years ago
4 0

Answer:

120 - 4.5t= 75

t = 10 minutes

Step-by-step explanation:

the equation :

120 - 4.5t= 75

the solution:

-4.5 t = 75-120

-4.5t = -45

t = -45/(-4.5) = 10 minutes

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In a batch of 960 calculators, 8 were found to be defective. What is a probability that a calculator chosen at random will be de
DaniilM [7]
Out of 960 calculators, 8 were found be to defective

Probability:
                 \frac{8}{960}
                 0.00833...
As a Percent:
                 0.00833....× 100
                 0.833%
To the nearest tenth of percentage:
                 0.833% ≈ 0.8%
8 0
3 years ago
Read 2 more answers
It says factor each expression 49x-28?
NARA [144]

Answer:

7(7x -4)

Step-by-step explanation:

49x-28

We can factor a 7 from each term

49x = 7*7x

28 = 7*4

7(7x -4)

3 0
3 years ago
The price for a gallon of whole milk has increased from 2006 to 2008. from 2006 to 2007, the cost of whole milk increased by app
valkas [14]
You have the starting price of $1.99. To get the increased price, divide 1.99 by .56 (.56 is the decimal form of 56%). You would get $3.55. This is for the year 2007. So for 2008, divide 3.55 by .42. The answer is $8.45. You can check the answers by multiplying the answers you go the the percentage. Ex. 8.45* .42=3.55 (rounded)
3 0
3 years ago
12.) You purchased a scooter for $6,800 when it was on sale for 30% off. What was the original price of thescooter?
Rina8888 [55]

SOLUTION:

Case: Percentages

Method:

The sale price after 30% off is $6800

Let the original price be 'x'

30% off means 70% of the original price

\begin{gathered} \frac{70}{100}\times x=6800 \\ 0.7x=6800 \\ x=\frac{6800}{0.7} \\ x=9714.2857 \end{gathered}

Final answer: (Nearest cents)

The original price was $9714.29

4 0
1 year ago
Solve |3x - 5] = 2 - 1/2x​
bekas [8.4K]

Answer:

x=2

Step-by-step explanation:

First multiply both sides by 2:

6x-10=4-x

Move the variable to the left-hand side and change its sign:

6x-10+x=4

Move the constant to the right-hand side and change its sign:

6x+x=4+10

Collect like terms:

7x=14

Divide both sides of the equation by 7:

x=2

8 0
2 years ago
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