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SpyIntel [72]
2 years ago
5

Mark bought a notebook for $1.45 and some pencils for $0.42 each. If the total cost was $6.91, how many pencils did he buy?

Mathematics
2 answers:
choli [55]2 years ago
7 0
1. 6.91 - 1.45 = 5.46
You subtract the notebook from the total cost

2. 5.46 / 0.42 = 13
You divide the cost of a pencil from the left over amount of money to see how many pencils Mark bought

3. Mark bought 13 pencils
Lesechka [4]2 years ago
5 0
B - 13

Okay, we know that Mark brought 1 notebook and the totally is 6.91 while one pencil costs $0.42.

x= number of pencils he brought.
we know the price of 1 notebook + the cost of pencils times the numbers of pencils he brought = total cost.

So the equation will be:

1.45 + 0.42x = 6.91  subtract 1.45 on both sides.
0.42x = 5.46   Then we solve for x by dividing both sides by 0.42
x= 13

So the number of pencils he brought is 13.

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A stone is launched into the air from a height of 240 feet. The height, h, of the stone, in feet, t seconds after launch is give
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A projectile is an object <u>launched</u> into space, and moving under the <em>influence</em> of <u>gravity</u> and <u>momentum</u>. The <em>stone</em> here is an example. Thus, the <em>time</em> taken for the stone to reach the ground is 10 seconds.

On <em>launching</em> of the stone into <u>space</u>, it behaves as a <u>projectile</u>. Thus moving under the <em>influence</em> of gravity and its momentum. Its <u>momentum</u> is the <em>product</em> of its <u>mass </u>and <u>velocity</u>.

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From the second equation of <em>free fall</em>,

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Thus option A is the required answer.

Visit: brainly.com/question/13834669

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