The 2 angles form a linear pair and angles that form a linear pair have a sum of 180 so
10x + 15 + 5x = 180
15 + 15x = 180
180 - 15 = 15x
165 = 15x
11 = x
Answer:
900 cm
Step-by-step explanation:
Proportions
1cm ⇒ 50cm
18cm ⇒ Wcm
W = 18*50/1
W = 900cm
11.
Given:

Differentiate with respect to x, we get

The given point is (3,9)
Substitute x=3 in the derivative, we get

Hence the slope is 3.
12.
Given:

Differentiate with respect to x, we get

The given point is (0,4)
Substitute x=0 in the derivative, we get

Hence the slope is 0.
The 3 inside angles of a triangle need to add up to 180 degrees.
You have two angles of 104 and 36.
A = 180 - 104 - 36 - 40
The answer is 40
12598 rounded to 10k = 10000