What adds to 60 and multiples to 900

30

Step-by-step explanation:

30 + 30 = 60

3* 3 = 9

Add the 0s

30 * 30 = 900

I hope I helped!

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~ Zoe

It is 30

Proven work:

30 x 30 = 900

30 + (30) = 60

x=30

step-by-step explanation:

fist on the left goes with the third on the right. second on the left goes with the fourth on the right. third on the left goes with the second on the right. the fourth on the left goes with first on the right