5d - 7 = -13
5d = -13 + 7
5d = -6
d = -6/5
Answer:
[-1,3]
Step-by-step explanation:
If angles are complementary, they add up to 90 whereas when they are supplementary, the add up to 180. So now let's focus on this problem. It says angle 1 and 2 are complementary. Therefore;
angle 1 + angle 2 =90
x+(3x+30)=90
x+3x+30=90
4x+30=90
-30 -30
4x=60
4/4x=60/4
x=15
Therefore, the value of x is 15
Answer:
https://orion.math.iastate.edu/dept/links/formulas/form1.pdf
Step-by-step explanation:
