7 × x - 7 × 20
You could rewrite it this way, 7 x (x-20), but the answer above is better 'cause it takes away the grouping symbols
Answer:
C. 3,960
Step-by-step explanation:
∆ADB ~ ∆EDC. Therefore,

(substitution)
Solve for x
Cross multiply
5x - 3x = 7,920
2x = 7,920
x = 7,920/2
x = 3,960 meters
Answer:
141.78 m
Step-by-step explanation:
Let d = distance of boat from the base of the lighthouse
Tan 10 = 25/d
d tan 10 = 25
d = 25/tan 10
d = 141.78 m
The answer to this question is: 47
Set up you question 5256 divided by 56 then write the answer. Finally if you get a remainder put the answer then the remainder