Anna is evaluating some rational expressions. Which THREE are correct?
Responses
A 152 − 200 = −48152 − 200 = −48
B −25 + (−25) = 0−25 + (−25) = 0
C 89 − (−17) = 10689 − (−17) = 106
D 134 − (−16) = 118134 − (−16) = 118
E −39 − (−28) = −11
The three correct rational expressions are:
C 89 − (−17) = 106
D 134 − (−16) = 118
E −39 − (−28) = −11
What is 4−1 1/4+1/2
To evaluate the expression 4−1 1/4+1/2, we need to simplify it step by step.
First, let's convert 1 1/4 into an improper fraction:
1 1/4 = (4 * 1) + 1 / 4 = 5/4
Now, the expression becomes:
4 - 5/4 + 1/2
To add these fractions, we need to have a common denominator, which is 4:
4 - (5/4)*1 - (1/2)*(2/2)
4 - 5/4 - 2/4
Now we can subtract the fractions:
4 - 7/4
To simplify this further, we need to find a common denominator for 4 and the fraction 7/4, which is also 4:
16/4 - 7/4
Now we can subtract the numerators:
(16 - 7) / 4 = 9/4
So, 4−1 1/4+1/2 simplifies to 9/4 or 2 1/4.
Evaluate this expression.
−86.4 + 16.38.
To evaluate the expression -86.4 + 16.38, we simply need to add the two numbers together:
-86.4 + 16.38 = -69.02
So, the evaluated expression is -69.02.
Evaluate this expression.
−86.4 + 16.38.
A −70.02−70.02
B −69.64−69.64
C 102.78102.78
D 122.42122.42
To evaluate the expression −86.4 + 16.38, you need to add the two numbers together.
-86.4 + 16.38 = -70.02
So the correct option is A. -70.02.
Find the sum..
−3/2+ 8/5
To find the sum of −3/2 + 8/5, we need to first find a common denominator.
The common denominator for 2 and 5 is 10.
Converting the fractions to have a common denominator:
−3/2 = −15/10
8/5 = 16/10
Now we can add the fractions:
−15/10 + 16/10 = 1/10
So, the sum of −3/2 + 8/5 is 1/10.
Evaluate this expression.
75.5 − 32.55