It mean benchmarks in out side of math
a criterion by which to measure something; standard; reference point
X = 60°
Because the square in the corner tells you that it is 90° (right angle)
So your equation to solve for x would be...
x + 30 = 90
Now you need to isolate the x.
Subtract both sides by 30.
x + 0 = 90 - 30
x = 60
Since 3/5 are tulips, that makes the remaining flowers not tulips. Therefore, 2/5 of the flowers in her garden are not tulips. Hope this helps!
