2 years ago

Ten marbles are in a bag. Four of the marbles are red.

Mathematics

1 answer:

victus00 [196]2 years ago

5 0

Answer:

40% or 4/10

Step-by-step explanation:

If 4 out of the 10 marbles are red, you simply divide them (4/10).

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2 years ago

Students receive a 15% discount at the local movie theater. If a student pays the discounted price of $7.65, what is the origina

Over [174]

Answer:

$\large \boxed{\$9.00}$

Step-by-step explanation:

Let p = the original price of the ticket

$\begin{array}{rcl}\text{ Price before discount - discount} & = & \text{sale price}\\p - 0.15p & = & 7.65\\0.85p & = & 7.65\\p & = & \dfrac{7.65 }{0.85}\\\\& = & \mathbf{9.00}\\\end{array}\\\text{The original price of the ticket was $\large \boxed{\mathbf{\$9.00}}$}$

Check:

$\begin{array}{rcl}9.00 - 0.15(9.00) & = & 7.65\\9.00 - 1.35 & = & 7.65\\7.65 & = & 7.65\\\end{array}$

OK.

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Start by finding the area of the base.

A = lw
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Sides use the formula of a triangle: 1/2bh
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Next, there are 4 sides, so multiply the side area by 4.
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3 years ago

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