Answer:
Correct answer is x = 28°
Step-by-step explanation:
Okay we know Angle A is 2x + 2
Angle B is 90
Angle C is 180 - 148 = 32 ( straight line angle is 180)
Sum of all angles should be 180 in a triangle
which means
A + B + C = 180
2x + 2 + 32 +90 = 180
2x + 124 = 180
2x = 180-124
2x = 56
x = 56/2
x = 28
Hello,
9)
∠DBC=90-54=36°
∠CAD=∠DBC=36°
10)
∠BOC=1/2(360-2*100)=1/2*160=80°
∠l=1/2∠AOD=1/2∠BOC=40°
11)
JL=10
JA=7==>AL=10-7=3
LC=AL=3
LK=11
CK=11-3=8
KB=KC=8
BJ=JA=7
perimeter=10+11+15=36
If you let X = the distance in miles from Dales's house, and understand rate = distance/ time, the rate going to mountains = x/7, and back from mountains is x/5. If dale was 18mph fast going home, the equation would be...
(coming home rate) = (going to mountain rate) + 18 which is
x/5 = x/7 + 18. Then solve for X.
Use the least common denominator = 35 so multiply everything by 35 and you get...
7x = 5x+630
simplify...
2x = 630, then
x = 315 .
Dale live 315 miles away from the mountains.
The length of ND = 3 units
The length of N'D' = 6
6 / 3 = 2
The scale factor is 2
