Core Connections: Course 3
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2. Section 9.2
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Exercise 132 Page 437

Practice makes perfect
We want to simplify the following expression. 3 15* 7/4 Before we evaluate the expression, let's first rewrite the expression so that all of the numbers are fractions.

3 15* 7/4
3* 5+1/5* 7/4
15+1/5* 7/4
16/5* 7/4

Now we can multiply the fractions and write the result as a mixed number in simplest form.

16/5* 7/4
16* 7/5* 4
112/20
112÷ 4/20÷ 4
28/5
â–¼
Write fraction as a mixed number
25+3/5
25/5+3/5
5+3/5
5 35

Let's consider the given expression. 5^3* ( - 4/5) We want to simplify the expression. According to the Order of Operations, we need to start by calculating the power. Then, we will perform the multiplication.

5^3* ( - 4/5)
125* ( - 4/5)
- 125 * 4/5
- 125 * 4/5
- 500/5
- 100

We are asked to simplify the given expression. 2^4* 5/8 According to the Order of Operations, we need to start by calculating the power and then we will perform the multiplication.

2^4* 5/8
16* 5/8
16* 5/8
80/8
10

Let's consider the given expression. - 1/2* 3^2 Like in Part B and Part C, to simplify the expression, we need to start by calculating the power. Then, we will perform the multiplication.

- 1/2* 3^2
- 1/2* 9
- 9/2

The expression is equal to - 92. We can write this fraction as a mixed number.

- 9/2
â–¼
Write fraction as a mixed number
- 8+1/2
- (8/2+1/2)
- (4+1/2)
- 4 12

We want to simplify the following expression. - 5/6+(1/2)^2 According to the Order of Operations, we need to start by calculate the power. To do this, we can use the Power of a Quotient Law. This law states that if we want to calculate the power of a quotient, we can write the quotient as the ratio of two powers with the same exponent.

- 5/6+(1/2)^2
- 5/6+1^2/2^2
- 5/6+1/4

Now let's add the fractions and write the result in simplest form.

- 5/6+1/4
- 5* 4/6* 4+1/4
- 20/24+1/4
- 20/24+1* 6/4* 6
- 20/24+6/24
- 20/24+6/24
- 20+6/24
- 14/24
- 14/24
- 14÷ 2/24÷ 2
- 7/12

Let's analyze the given expression. (- 4/5)^2-3/50 To simplify the expression, we need to start by calculating the power by using the Power of a Quotient Law.

(- 4/5)^2-3/50
(4/5)^2-3/50
4^2/5^2-3/50
16/25-3/50

Now let's perform the subtraction and write the result in simplest form.

16/25-3/50
16* 2/25* 2-3/50
32/50-3/50
32-3/50
29/50

We are asked to simplify the following expression. (3/10)^2-(- 2/5)^2 According to the Order of Operations, we need to start by calculating the powers. Let's use the Power of a Quotient Law.

(3/10)^2-(- 2/5)^2
(3/10)^2-( 2/5)^2
3^2/10^2-2^2/5^2
9/100-4/25

Now let's subtract the fractions.

9/100-4/25
9/100-4* 4/25* 4
9/100-16/100
9-16/100
- 7/100
- 7/100

Let's consider the given expression. 8^2( - 7/8 ) -1/2 According to the Order of Operations, to simplify the expression, we need to start by calculating the power. Then, we will perform the multiplication and subtraction.

8^2( - 7/8 ) -1/2
64( - 7/8 ) -1/2
- 64( 7/8 ) -1/2
- ( 64* 7/8 ) -1/2
- ( 448/8 ) -1/2
- 56 -1/2
- 56 12