### All Algebra 1 Resources

## Example Questions

### Example Question #2531 : Algebra 1

Evaluate 5x + 3y when x = 7 and y = 9.

**Possible Answers:**

66

62

8

–62

–66

**Correct answer:**

62

Plug in 7 for x and 5 for y, giving you 5(7) + 3(9). This is equal to 35 + 27, which equals 62.

5x + 3y

5(7) + 3(9)

35 + 27 = 62

### Example Question #71 : Real Numbers

A plane flies at a rate of 210mi/h. If the plane has flown for five hours, how many miles has it traveled?

**Possible Answers:**

1000mi

840mi

215mi

42mi

1050mi

**Correct answer:**

1050mi

Multiply the rate of travel (210 mi/hr) by the time traveled (5 hours), and you get the total distance, 1050 miles.

distance = rate * time

distance = (210mi/hr)(5hr)

distance = 1050mi

### Example Question #72 : Real Numbers

Find the volume of a cube that is five feet on each side.

**Possible Answers:**

25ft^{3}

10ft^{3}

125ft^{3}

5ft^{3}

15ft^{3}

**Correct answer:**

125ft^{3}

To find the volume of a cube, you cube the side length, raising it to the thrid power. 5^{ }cubed is 125.^{}

(5ft)^{3} = 5ft*5ft*5ft = 125ft^{3}

### Example Question #73 : Real Numbers

What is the square root of 81?

**Possible Answers:**

–9

3

9

40.5

27

**Correct answer:**

9

9 * 9 = 81, and thus 9 is the square root of 81. It is true that (–9) * (–9) = 81, but it is a convention that "the square root" refers to the positive value. Had the question asked for "a square root" or "the square roots" of 81, –9 would be acceptable.

### Example Question #74 : Real Numbers

What is (–16) * (–2)?

**Possible Answers:**

32

–32

64

8

–8

**Correct answer:**

32

When multiplying two negative numbers, the negatives cancel each other out, leaving a positive solution, thus, we can think of (–16)(–2) as (16)(2), which is 32.

(–16) * (–2)

(–1)(16) * (–1)(2)

(–1)(–1) * (16)(2)

(1) * (16)(2)

16 * 2

32

### Example Question #75 : Real Numbers

Solve:

**Possible Answers:**

None of the available answers

**Correct answer:**

### Example Question #76 : Real Numbers

If is an integer, which of the following must be odd?

**Possible Answers:**

**Correct answer:**

While all of the answers could result in an odd answer, only guarantees an odd answer. Since any integer multiplied by 2 is even, adding 1 will always give the next consecutive odd integer.

### Example Question #77 : Real Numbers

What is ?

**Possible Answers:**

**Correct answer:**

Multiply the absolute values to get the magnitude of the answer.

Remember the following rules:

Positive * negative = negative

Positive * positive = positive

Negative * negative = positive

Since we are dealing with a positive and a negative, our answer will be negative.

### Example Question #78 : Real Numbers

**Possible Answers:**

**Correct answer:**

### Example Question #79 : Real Numbers

**Possible Answers:**

**Correct answer:**

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