4x+10 + 3x+5 +y =180
solve for y y=third angle
combine like terms
7x+15+y =180
subtract 7x+15 from each side
y = 180 -(7x+15)
y = 180 -7x-15
y = 165 -7x
The third angle equals 165-7x
Answer:
122.6 m
Step-by-step explanation:
Shadow cast by the man = 3.1 m
Height of the man = 1.9 m
Shadow cast by the lighthouse = 200 m
Height of the lighthouse = x
If two shapes are similar, the ratio of their corresponding sides would be equal.
Therefore,
x/1.9 = 200/3.1
Multiply both sides by 1.9
x = (200*1.9)/3.1
x = 122.6 m (nearest tenth)
The lighthouse is 122.6 m tall
Check the picture below.
make sure your calculator is in Degree mode.
Answer:
25 liters
Step-by-step explanation:
0.5 * 50
= 25
That is the answer