Evaluate the numerical expression
1/2-(-3/4)
Is it A 1/3
B 1/4
C 3/2
D 5/4
E 7/4
We can simplify the expression as follows:
1/2 - (-3/4)
= 1/2 + 3/4
To add the fractions, we need a common denominator, which in this case is 4.
1/2 + 3/4
= 2/4 + 3/4
= 5/4
Therefore, the correct answer is D) 5/4.
The temperature in Antarctica at noon is 14°F. By 9:00PM, the temperature had dropped by 16.2 degrees. What was the temperature at 9:00PM?
A -2.2 degrees.
B 2.2 degrees
C -30.2 degrees
D 30.2 degrees
To find the temperature at 9:00 PM, we need to subtract 16.2 degrees from the temperature at noon.
14°F - 16.2°F = -2.2°F
Therefore, the temperature at 9:00 PM was -2.2 degrees Fahrenheit.
So, the correct answer is A) -2.2 degrees.
Evaluate this expression.
32 + (−72.1)
To evaluate the expression, simply add the numbers:
32 + (-72.1) = -40.1
Therefore, the expression evaluates to -40.1.
Evaluate this expression.
75.5 − 32.55
To evaluate the expression, subtract the numbers:
75.5 - 32.55 = 42.95
Therefore, the expression evaluates to 42.95.