Answer:
Q1. 20x = 200. The value of x is 10
Q2. 7 - 3x = 1. The value of x is 2.
Step-by-step explanation:
In order to find an equation, you have to let the number be any variable, such as m or n or z. So I will let the number be <em>x variable</em>. Then the question says a number is multiplied by 20 is equals to 200 :
Let number = x,
Same for the next question. Given that a number multiplied by 3 :
Let number = x,
Then subtracted by 7 equals to 1 :
Answer:
x=5
Step-by-step explanation:
If the equation is:
3(x+1)=7(x-2) -3
Solution:
Multiply (x+1) by 3 and (x-2) by 7
3x+3 = 7x-14 -3
3x+3 = 7x -17
Now combine the like terms:
3+17 = 7x-3x
20 = 4x
Now divide both the terms by 4
20/4 = 4x/4
5 = x
You can write it as x=5
Thus the value of x is 5 ....
Step-by-step explanation:
tan x =opp/adj
x = tan-¹(8/20)
x =21.8 degree
but you are asked to find the angle of elevation so
angle of elevation + 21.8 + 90 = 180 degree .... basic rule of triangle
angle of elevation=180-90-21.8
angle of elevation=68.2 degree
Answer:
x=3 (C)
Step-by-step explanation: