it is very easy how to solve mrc x 90 and this algebra and im in 6th grade and i figured this out yesturday
mrc=o
90=90 so, mrc x 90 = 0
because mrc is o in other terms so your multiplying 90 x 0 but instead its just mrc x 90
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x+90=93902
90+x+72+30 = 180. If you add 90+72+30, you get 192. But to get 180 you have to subtract 12. 90+(-12)+72+30 =180 if x is -12
I am not sure what "tan A 90 degree" means. tan(90 degrees) is an expression that is not defined and so cannot be solved. One way to see why that may be so is to think of tan(x) = sin(x)/cos(x). When x = 90 degrees, sin(90) = 1 and cos(90)= 0 that tan(90) = 1/0 and since division by 0 is not defined, tan(90) is not defined.
1) 5x2-55=90 +55 +55 2) 10x=145 /10 /10 x=14.5
You have to know how long it takes to get to 90 mph to solve this. Speed = acceleration x time