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Svetradugi [14.3K]
3 years ago
13

40,000 is 10 times as much as

Mathematics
1 answer:
Dimas [21]3 years ago
3 0
40,000 is 10 times as much as 4,000
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Mr. Monasterio ran to the store for burritos at 4 miles per hour. On the way back, he increased his speed to 6 miles per hour. I
sveticcg [70]

Answer:

It took 1.2 hours to get to the store

Step-by-step explanation:

Let the time taken to reach the store be t₁

Let the time taken to come back be t₂

Let the speed to and from store = s₁ and s₂ respectively

let the distance to the store = d

To the store:

speed = \frac{distance}{time} \\s = \frac{d}{t_1} \\t_1 = \frac{d}{s_1}\\t_1 =\frac{d}{4} - - - - - (1)

Back from the store:

s_2 = \frac{d}{t_2} \\t_2 = \frac{d}{s_2}\\where:\\s_2 = 6\ miles\ per\ hour\\t_2 = \frac{d}{6} - - - - - - (2)

We are told that total time (t₁ + t₂) = 2 hours

t₁ + t₂ = eqn (1) + eqn (2)

\frac{d}{4} + \frac{d}{6} = 2\\Multiplying\ through\ by\ 12:\\3d\ +\ 2d\ =\ 24\\5d = 24\\d = \frac{24}{5} \\d = 4.8\ miles

∴ length of trip to the store = t₁

from eqn (1)

t_1 = \frac{d}{4} \\t_1 = \frac{4.8}{4} \\t_1 = 1.2\ hours

7 0
3 years ago
sam decides to build a square garden. if the area of the garden is 4x2 28x 49 square feet, what is the length of one side of the
jekas [21]
To find the side lengths, you have to factor 4x^2 + 28x + 49. This equation factored is (2x+7)(2x+7), so each side length is (2x+7) feet.
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What is 3.9 divided by 100.000​
Amanda [17]

Answer: 0.039

Step-by-step explanation: you move the "3.9" 2 decimal places to the right. If you did the inverse (multiplying by 100) you would get 390.00

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2 years ago
A marker is 0.13 what is the length in millimeters
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If the marker is 0.13cm, then it is 13 millimeters.
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Anita paid a total of $57.50 for a blazer. The price of the blazer was $52.85. What was the sales tax rate? 4.56% 8.08% 8.79%
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The sales tax rate was 8.79%.
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