Answer:
4
Step-by-step explanation:
X+8= 12
Carry over the 8 and make X the subject.
X= 12-8
X= 4
She could make 20 servings of lasagna.
There are 4 servings per pound of lasagna, and there are 5 pounds total.
4 x 5 = 20
R=xa+xb, r-xa=xb, b=r-xa/x
Answer:

Step-by-step explanation:
Given : 
We have to write which identity we will use to prove the given statement.
Consider 
Take left hand side of given expression 
We know

Comparing , we get, a= 180° and b = q
Substitute , we get,

Also, we know
and 
Substitute, we get,

Simplify , we get,

Hence, use difference identity to prove the given result.
Answer:
The slope of the line represented by y = -5x is "-5".
Step-by-step explanation:
y=mx+b
M=slope
b=Y-intecerpt