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balandron [24]
3 years ago
15

A contractor purchases ceramic tile to remodel a kitchen floor. Each tile costs $4.00, and the adhesive and grouting material ne

eded for the whole job costs $15.82. The contractor is charged a total of $655.82, how many ceramic tiles did the contractor purchase?
Mathematics
1 answer:
Kazeer [188]3 years ago
8 0

Answer:

160 tiles.

Step-by-step explanation:

First let's make an equation.

Each tile costs $4, let's make <em>t=number of tiles.</em>

+$15.82, and the total cost being $655.82

So ideally our equation would look like

<em>4t+15.82=655.82</em>

<em />

Now solve.

First, subtract <em>15.82 </em>on both sides.

<em>4t=640</em>

Second, divide <em>4 </em>on both sides to make the variable <em>t </em>by itself.

<em>t=160</em>

<em />

So, the contractor purchased 160 tiles.

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Answer: She invested $5000 in an account that pays 6% interest and $10000 in an account that pays 7% interest.

Step-by-step explanation:

Let P be the initial amount she invested in an account that pays 6% interest.

Then, amount invested in other account = 2P

Simple interest = Principal x rate x time

After one year, for the first account,

Interest = P(0.06)(1)  = 0.06P

For second account,

Interest = (2P)(0.07)(1)=0.14P

Total interest = 0.06P+0.14P=1000

\Rightarrow\ 0.20P=1000\\\\\Rightarrow\ P=\dfrac{1000}{0.20}\\\\\Rightarrow\ P=5000

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Hence, She invested $5000 in an account that pays 6% interest and $10000 in an account that pays 7% interest.

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3 years ago
Global mean temperature was changing the most rapidly in 2005. How quickly was the temperature changing in 2005
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The temperature was changing at a rate of 2.925 degrees Celsius in 2005

<h3>How to determine the rate in 2005</h3>

From the graph (see attachment), we have the following ordered pair

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The above means that, the temperature in 2005 is 14.625 degrees Celsius

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Hence, the temperature was changing at a rate of 2.925 degrees Celsius in 2005

Read more about average rates at:

brainly.com/question/8728504

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