Write the prime factorization of 63 and 90 to reduce 63/90

63/90 = 7/10

Step-by-step explanation:

63 = 3²×7

90 = 2×3²×5

The factor of 3² is common to both numbers, so the fraction reduces to ...

... 63/90 = (3²×7)/(3²×10) = 7/10

the answer is b. 60. each interior angle in 120, so the exterior angle must be 60 in order to add up to 180

step-by-step explanation:

a

step-by-step explanation:

strong negative correlation