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shepuryov [24]
2 years ago
13

Martha earned $180 during the summer doing chores. She bought 3 books worth $14 each using her chore money. How much money was l

eft after she bought the books?
$42
$46
$135
$138
Mathematics
2 answers:
mario62 [17]2 years ago
6 0
The answer is 42dollars
kvasek [131]2 years ago
5 0

Answer:

The answer is 42 dollars trust me give me brainliest pls

Step-by-step explanation:

I’m a GOAT in math

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A pan is heated to 409°F, then removed from the heat and allowed to cool in a kitchen where the room temperature is a constant 7
Irina18 [472]

Answer: C. 265.9^{\circ}F

Step-by-step explanation:

Given: The formula below can be used to find D, the difference in temperature between the pan and the room after t minutes.

D = 338e^{-0.03t}

At t= 8 minutes, we get

D = 338e^{-0.03(8)}\\\\\Rightarrow\ D = 338e^{-0.24}\\\\\Rightarrow\ D = 338(0.786627861067)\\\\\Rightarrow\ D = 265.88\approx265.9^{\circ}F

The approximate temperature of the pan after it has been away from the heat for 8 minutes=   265.9^{\circ}F

6 0
3 years ago
Fission tracks are trails found in uranium-bearing minerals, left by fragments released during fission events. An article report
Harlamova29_29 [7]

Answer:

Mean track length for this rock specimen is between 10.463 and 13.537

Step-by-step explanation:

99% confidence interval for the mean track length for rock specimen can be calculated using the formula:

M±\frac{t*s}{\sqrt{N}} where

  • M is the average track length (12 μm) in the report
  • t is the two tailed t-score in 99% confidence interval (2.977)
  • s is the standard deviation of track lengths in the report (2 μm)
  • N is the total number of tracks (15)

putting these numbers in the formula, we get confidence interval in 99% confidence as:

12±\frac{2.977*2}{\sqrt{15}} =12±1.537

Therefore, mean track length for this rock specimen is between 10.463 and 13.537

4 0
3 years ago
Using this data, how many plots would be found on 6 and 1/2?
galben [10]

Answer: 6 full plots I believe

Step-by-step explanation:

4 0
2 years ago
What is the perimeter of the triangle expressed as a polynomial? 3x+4, x-10, 5x-2
Ganezh [65]
Your answer is 9x-8.

3x+4, x-10, 5x-2. If you combine the x's you get 9x. You can combine the numbers however you'd like. I chose to combine +4 and -2. That's 2. 2-10 = -8. Therefore your answer is 9x-8.
6 0
3 years ago
- Which of the following expressions has a coefficient of 10 and a constant of 5?
maw [93]

Answer:

Either 10+5 or 10-5

Step-by-step explanation:

Coefficient- the number that is multiplied by the variable

Constant- a number that stays the same and is not changed no matter what x or y equals.

6 0
2 years ago
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