She will need 1/4 cup of walnuts. In order to find the solutions to products such as these, you multiply the two fractions.
b)
|2x−3y| if x=0.5; y=−0.7
Substitute: |2(0.5)-3(-0.7)|
Simplify: |1+2.1|
Simplify: |3.1|
Since it is an absolute value, it will always be positive: 3.1
d)
|−3 |x| +2x−1| if x=−5
Substitute: |-3(|-5|)+2(-5)-1|
Absolute value is positive: |-3(5)+5(-5)-1|
Simplify: |-15-25-1|
Simplify: |-41|
Absolute value always positive: 41
Step-by-step explanation:
Note: I used the identity
for the last step.
PS. I love proving trigonometric identities!
A. -13.8 just plug in the numbers -6.3-7.5=-13.8