Parker baked 80 cookies for a bake sale. At the bake sale, 70% of his cookies sold. How many of Parker’s cookies were sold?
2 answers:
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Step 1. Simplify 
to 
Step 2. Simplify to 
Step 3. Simplify
to 
Step 4. Cancel
on both sides
Step 5. Multiply both sides by
(the LCM of 
)
Step 6. Expand
Step 7. Subtract
from both sides
Step 8. Simplify
to 
Step 9. Multiply both sides by
Done! :) Hope this helps! :)
Step 2. Simplify
Step 3. Simplify
Step 4. Cancel
Step 5. Multiply both sides by
Step 6. Expand
Step 7. Subtract
Step 8. Simplify
Step 9. Multiply both sides by
Done! :) Hope this helps! :)
Answer:
Step-by-step explanation:
Given:
Need:
First, let's look at the identities:
sum:
difference:
The question asks to find sin(A - B); therefore, we need to use the difference identity.
Based on the given information (value and quadrant), we can draw reference triangles to find the simplified values of A and B.
sin(A) =
cos(A) =
sin(B) =
cos(B) =
Plug these values into the difference identity formula.
Multiply.
Add.
This is your answer.
Hope this helps!