The surface area of a rectangular prism is 198 cm2. two of the dimensions are 3 cm and 9 cm. find the measure of the other dimension.

In this question, it is given that two of the dimensions are 3 cm and 9 cm . Let the other dimension be x cm .

And the surface area of the rectangular prism is given. Now we use the formula of surface area of prism, which is

Subtracting 27 to both sides,

Dividing both sides by 12

So the length of the remaining dimension is 6 cm .

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given the equation is 8+9z=-6, the first step would be to subtract the 8 from both sides:

8+9z-8=-6-8

since 8 minus 8 = 0, this would cancel out the 8. and since -6 minus 8 equals -14, the equation would look like this

9z = -14