For Question 3,
15 ?
__ = ____
120 100
120?=1500
1500/120=12.5
?=12.5%
Question 4
I think it is $462.80
2x+2x+60=180 because the angles have to add up to 180
So you have
4x+60=180
4x=120
x=30
To find AB(x) and BC(y), you can do(there are multiple ways you can do this):
tan A =
tan 60° = or (tan 60°) · 7 = y
tan 60° =
√3 · 7 = y
7√3 cm = y
sin B =
sin 30° = or
sin 30° = =
x =
x = 14 cm
AB = 14cm
BC = 7√3 cm
Answer:
7x³y² - 3x²y² + xy - 5
Step-by-step explanation:
Add like terms.
5x³y² + 2x³y² = 7x³y²
-3x²y² = -3x²y²
-3xy + 4xy = xy
2 - 7 = -5
Put them all together.
7x³y² - 3x²y² + xy - 5
W: (5,9)
X: (7,8)
Y: (9,2)
Z: (2,5)
hope this helps! tell me if i got anything wrong!