Which ratio is equivalent to start fraction 3 over 7 end fraction? a. 6 to 10 b. 9: 21 c. start fraction 12 over 35 end fraction d. 7 to 3

B. 9 : 21

Step-by-step explanation:

Multiply numerator and denominator by 3:

... 3/7 × 3/3 = 9/21 ⇒ 9 : 21

Any denominator that is not a multiple of 7 will not work. 35 is a multiple of 7 (=5×7), but 12 (=4×3) is not the same multiple of 3.

3x + 18 = 147°

step-by-step explanation:

3x + 18 = 147°, because the value of the central angle is equal to the value of the arc formed by it.

i hope i you.