Rectangles have four right angles
thus ∡ R + ∡S = 90° + 90°
= 180°
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Answer:
x= -2+3/7
Step-by-step explanation:
you have to add all the common denominators and then you have to divide by the answer you get at the end if you want to check it just plug in the number and you get your answer plz give me brainliest.
Answer:

Step-by-step explanation:
we know that
Depending on your calculator, you enter the degree and then press the trig button or the other way around. Also, make sure the mode of your calculator is in DEGREES
we have

see the attached figure to better understand the problem
Find the value of x when a=1, b=2, y= 3 by using general formula
After replace number in a, b, y we have
3 = 1ax^2 - 2x - 12
x^2 - 2x -15 = 0
x^2 - 5x + 3x -15 = 0
(x^2 - 5x) + (3x -15) = 0
x*(x - 5) + 3*(x - 5) = 0
(x - 5)*(x + 3) = 0
x - 5 = 0 or x + 3 = 0
x=5 or x=-3
this might help if any problem then ask.