Answer:
Step-by-step explanation:
hello,
the question is not really clear. i believe the intended equation would be

please check the attached file for the step by step proof.
Answer:
27
Step-by-step explanation:
30%=0.3 in decimal form
90×0.3=27
Answer:
2/3 + 1/5 = 13/15
Step-by-step explanation:
Answer:
-7/5
Step-by-step explanation:
The slope of a perpendicular line is the "negative reciprocal" of the slope of the original line. so just switch the numbers and put the top number into a negative.