Answer:
8
Step-by-step explanation:
The sum of two interior angles in a triangle is equal to an exterior angle
7x - 4 + 9x + 4 = 128° add like terms
16x = 128 divide both sides by 16
x = 8
Answer:
Option.B
Step-by-step explanation:
Its because if you add these two angles you get a supplementary angle or 180°
Using this we can form an equation to find the value of x.
(Hope this answer helps :))
(And is this question from Khan Academy?)
Answer:
2 + 2w
w = 9.3in
l = 20.7 in
Step-by-step explanation:
Perimeter of a rectangle = 2 x (length + breadth)
legnth = 2 + 2w
width = w
2 x (2 + 2w + w ) = 60
(2 + 2w + w ) = 30
2 + 3w = 30
3w = 28
w = 9.3
length = 2 + 2x9.3 = 20.7
Answer:
C6 greeting cards for $23.40
Step-by-step explanation:
A. 13.5/3=4.5
B. 38.25/9=4.25
C. 23.4/6=3.9
d. 32.8/8=4.1
Answer:
(0,-4)
Step-by-step explanation:
The y-intercept is where the line intersects the y-axis. The y-intercept is written in the form (0,x), where x = y-coordinate/y-intercept. Thus, the answer is (0,-4).
