Maybe you need to distribute it. -8y + 8
Replacing x by 4 and y by 2, it is found that the value of the expression is of 8.
The expression given is:
We want to evaluate it for x=4 and y=2, hence, we replace x by 4 and y by 2, then:
The value of the expression is of 8.
A similar problem, in which the objective is finding the value of an expression, is given at brainly.com/question/19548262
Answer:
y = 105x
Step-by-step explanation:
$315 ÷ 3 = $105 per hour
$525 ÷ 5 = $105 per hour
Constant of Proportionality is $105 in both cases.
y = kx
y = 105x
In this case we know the three sides of the triangle, then this is a SSS triangle (Side Side Side). To solve this case, first we must use the Law of Cosines, applied to the opposite side to the angle we want to find.
We want to find angle W, and its opposite side is XV, then we apply the Law of Cosines to the side XV:
XV^2=XW^2+WV^2-2(XW)(WV)cos W
Replacing the known values:
116^2=96^2+89^2-2(96)(89)cos W
Solving for W
13,456=9,216+7,921-17,088 cos W
13,456=17,137-17,088 cos W
13,456-17,137=17,137-17,088 cos W-17,137
-3,681=-17,088 cos W
(-3,681)/(-17,088)=(-17,088 cos W)/(-17,088)
0.215414326=cos W
cos W = 0.215414326
Solving for W:
W= cos^(-1) 0.215414326
Using the calculator:
W=77.56016397°
Rounded to one decimal place:
W=77.6°
Answer: Third option 77.6°
