The correct answer to this question would be 5 because 4 is in the ones place.
Perimeter of rectangle is calculated by using formula 2*(a+b) where "a" and "b" are dimensions of rectangle (its width and height). If we replace "a" with "x" and "b" with "9" as those are dimensions of the frame the answer is 2*(x+9) which is the same as 2*x + 18.
Answer:
140°
Step-by-step explanation:
Let the angles be 2x,3x,6x and 7x
Now,
sum of all angles of a quadrilateral=360°
2x+3x+6x+7x =360°
18x=360°
x=360°/18
x=20
Then,
2x=2×20=40
3x=3×20=60
6x=6×20=120
7x=7×20=140
Hence,the largest angle is 140°
Simplifying
12x + -18 = 90
Reorder the terms:
-18 + 12x = 90
Solving
-18 + 12x = 90
Solving for variable 'x'.
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Move all terms containing x to the left, all other terms to the right.
Add '18' to each side of the equation.
-18 + 18 + 12x = 90 + 18
Combine like terms:
-18 + 18 = 0
0 + 12x = 90 + 18
12x = 90 + 18
Combine like terms:
90 + 18 = 108
12x = 108
Divide each side by '12'.
x = 9
Hence,
x = 9
Hope this helps! <3