Answer:
x=0.4
Step-by-step explanation:
combine like terms
7x+8 = 12 - 3x
10x = 4
divide both sides by 10
x=4/10
x=2/5
if you want a decimal, x=0.4
Step-by-step explanation:
Divide 87 by 2 to represent how many chairs will be occupied.

43 1/2 chairs will be occupied, meaning that 43 chairs have 2 people, and one chair has 1 person.
The chair with one person is represented as the last chair.
Im not understanding what you are asking
Answer:
Part 1) 
Part 2) 
Part 3) 
Step-by-step explanation:
step 1
Find the measure of side c
Applying the law of cosines

we have

substitute





step 2
Find the measure of angle A
Applying the law of sines

substitute the given values

solve for sin(A)



step 3
Find the measure of angle B
we know that
The sum of the interior angles in any triangle must be equal to 180 degrees
so

substitute the given values


