Answer:
x = 25
Step-by-step explanation:
The other angle in the triangle would equal 130 because the sum of angles in a triangle add up to 180.
2x + 130 = 180 because it is a linear pair
2x = 50
x = 25
Answer:
x<3
Step-by-step explanation:
add 5 to 16. then divide 7 from 21. the sign flips with inequalities involving multiplication and/or division
Answer:
The actual building will be 7.5 m tall
Step-by-step explanation:
Given the scale model value of the building, we want to find the actual height of the building
From the scale model;
1 cm = 0.5m
Thus 15 cm will be 15 * 0.5 = 7.5 m
Answer:
The correct option is D.
Step-by-step explanation:
The slope of a line is the change in y with respect to x.

If the slope of a line is undefined it means it is a vertical line and a vertical line can not passes through three quadrants. So, option A is incorrect.
If the slope of a line is 0 it means it is a horizontal line and a horizontal line can not passes through three quadrants. So, option B is incorrect.
If the slope of a line is positive it means the value of y increases as x increases.
Since it is an increasing line, therefore after a certain period both x and y will positive. It means the line will passes through first quadrant. So, option C is incorrect.
If the slope of a line is negative it means the value of y decreases as x increases. It can passes through each of Quadrants II, III, and IV.
Therefore the correct option is D.
Answer:
Recursive
a(1) = 9 ; a(n+1) = 3 * a(n)
Explicit
a(n) = 9 * 3^(n-1)