Algebra 1 : Linear Equations

Study concepts, example questions & explanations for Algebra 1

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Example Questions

Example Question #1271 : Linear Equations

How many pounds are in \(\displaystyle 95\) kilograms? \(\displaystyle 1\) kilogram is equal to \(\displaystyle 2.2\) pounds.

Possible Answers:

\(\displaystyle 209\)

\(\displaystyle 180\)

\(\displaystyle 197\)

\(\displaystyle 43.2\)

Correct answer:

\(\displaystyle 209\)

Explanation:

Since we know  \(\displaystyle 1\) kilogram is equal to \(\displaystyle 2.2\) pounds, we can write the following:

\(\displaystyle 95\text{ kilograms}\times\frac{2.2\text{ pounds}}{1\text{ kilogram}}=209\text{ pounds}\)

Example Question #1272 : Linear Equations

Convert \(\displaystyle 10\) miles per hour to meters per second. There are \(\displaystyle 1609\) meters in a mile.

Possible Answers:

\(\displaystyle 6.2\text{ meters per second}\)

\(\displaystyle 4.5\text{ meters per second}\)

\(\displaystyle 6.1\text{ meters per second}\)

\(\displaystyle 3.0\text{ meters per second}\)

Correct answer:

\(\displaystyle 4.5\text{ meters per second}\)

Explanation:

Since we know there are \(\displaystyle 1609\) meters in a mile and recall that there are \(\displaystyle 3600\) seconds in a hour, we can write the following:

\(\displaystyle \frac{10\text{ miles}}{1\text{ hour}}\times\frac{1609\text{ meters}}{1\text{ mile}}\times\frac{1\text{ hour}}{3600\text{ seconds}}=4.5 \text{ meters per second}\)

Example Question #41 : Converting Measurements

How many inches are in \(\displaystyle 193\) centimers? There are \(\displaystyle 2.54\) centimeters in \(\displaystyle 1\) inch.

Possible Answers:

\(\displaystyle 69.77\)

\(\displaystyle 85.43\)

\(\displaystyle 75.98\)

\(\displaystyle 72.13\)

Correct answer:

\(\displaystyle 75.98\)

Explanation:

Because we are told that there are \(\displaystyle 2.54\) centimeters in \(\displaystyle 1\) inch, we can write the following:

\(\displaystyle 193\text{ centimers}\times\frac{1\text{ inch}}{2.54\text{ centimeters}}=75.98\text{ inches}\)

Example Question #1273 : Linear Equations

How many days are in \(\displaystyle 691,200\) seconds?

Possible Answers:

\(\displaystyle 7\)

\(\displaystyle 9\)

\(\displaystyle 8\)

\(\displaystyle 12\)

Correct answer:

\(\displaystyle 8\)

Explanation:

Recall that there are \(\displaystyle 60\) seconds in a minute, \(\displaystyle 60\) minutes in an hour, and \(\displaystyle 24\) hours in a day.

\(\displaystyle 691,200\text{ seconds}\times\frac{1\text{ minute}}{60\text{ seconds}}\times\frac{1\text{ hour}}{60\text{ minutes}}\times\frac{1\text{ day}}{24 \text{ hours}}=8 \text{ days}\)

Example Question #1274 : Linear Equations

How many meters are in \(\displaystyle 124\) feet? There are \(\displaystyle 3.28\) feet in a meter.

Possible Answers:

\(\displaystyle 36.1\)

\(\displaystyle 42.9\)

\(\displaystyle 24.7\)

\(\displaystyle 37.8\)

Correct answer:

\(\displaystyle 37.8\)

Explanation:

Because we are told that there are \(\displaystyle 3.28\) feet in a meter, we can write the following:

\(\displaystyle 124\text{ feet}\times\frac{1\text{ meter}}{3.28\text{ feet}}=37.8\text{ meters}\)

Example Question #1273 : Linear Equations

How many kilograms are in \(\displaystyle 157\) pounds? There are \(\displaystyle 0.45\) pounds in \(\displaystyle 1\) kilogram.

Possible Answers:

\(\displaystyle 55.9\)

\(\displaystyle 70.7\)

\(\displaystyle 84.1\)

\(\displaystyle 67.2\)

Correct answer:

\(\displaystyle 70.7\)

Explanation:

Since we know that there are \(\displaystyle 0.45\) pounds in \(\displaystyle 1\) kilogram, we can write the following:

\(\displaystyle 157\text{ pounds}\times\frac{0.45 \text{ kilograms}}{1\text{ pound} }=70.7\text{ kilograms}\)

Example Question #44 : Converting Measurements

Imagine a group of greenhouse architects decides to create a new system of measurement for designing greenhouses.

The new system consists of Stems and Panes. 

\(\displaystyle 1\ Stem = 0.05m\)

\(\displaystyle 1\ Pane = 8\ Stems\)

\(\displaystyle 1\ Vine= 4\ Panes\)

In designing the top of a square greenhouse, the architects need to build sides that are 14 Vines in length. How many meters long will each of the sides be?

Possible Answers:

\(\displaystyle 23.2 m\)

\(\displaystyle 22.4 m\)

\(\displaystyle 21.8 m\)

\(\displaystyle 24.0 m\)

\(\displaystyle 26.2 m\)

Correct answer:

\(\displaystyle 22.4 m\)

Explanation:

To find the number of meters required, simply multiply the number of Vines (14) by the converstion factor of Vines to Panes (4).

Then multiply the result by the conversion factor of Panes to Stems (8).

The last step is to multiply this answer by the conversion factor of Stems to meters (.05). 

\(\displaystyle 14(4)(8)(0.05)=56(8)(0.05)=56(0.4)=22.4\)

Example Question #1275 : Linear Equations

Convert 15 feet into yards.

Possible Answers:

\(\displaystyle 5yds\)

\(\displaystyle 45yds\)

\(\displaystyle 25yds\)

\(\displaystyle 3yds\)

Correct answer:

\(\displaystyle 5yds\)

Explanation:

To solve this conversion we have to remember that there are 3 feet per 1 yard.

In order to have yards left as our unit, we need to make sure that the other units cancel out by one being in the numerator and one being in the denominator.

Therefore, set up the following conversion and solve:

\(\displaystyle \frac{15ft}{1}*\frac{1yd}{3ft}=\frac{15yds}{3}=5yds\)

 

Example Question #1276 : Linear Equations

Convert 16 quarts into gallons.

Possible Answers:

\(\displaystyle 2gal\)

\(\displaystyle 4gal\)

\(\displaystyle 32gal\)

\(\displaystyle 8gal\)

Correct answer:

\(\displaystyle 4gal\)

Explanation:

To solve this conversion we have to remember that there are 4 quarts per 1 gallon.

In order to have gallons left as our unit, we need to make sure that the other units cancel out by one being in the numerator and one being in the denominator.

Therefore, set up the following conversion and solve:

\(\displaystyle \frac{16qts}{1}*\frac{1gal}{4qts}=\frac{16gal}{4}=4gal\)

Example Question #1277 : Linear Equations

Convert 36 inches to feet.

Possible Answers:

\(\displaystyle 12ft\)

\(\displaystyle 108ft\)

\(\displaystyle 3ft\)

\(\displaystyle 6ft\)

Correct answer:

\(\displaystyle 3ft\)

Explanation:

To solve this conversion we have to remember that there are 12 inches per 1 foot.

In order to have feet left as our unit, we need to make sure that the other units cancel out by one being in the numerator and one being in the denominator.

Therefore, set up the following conversion and solve:

\(\displaystyle \frac{36in}{1}*\frac{1ft}{12in}=\frac{36ft}{12}=3ft\)

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