Question

An unknown number (b) is 10 more than an unknown number (k). The number (b) is also (k) less than 8. The equations to find (k) and (b) are shown below:

B = k +10
B = -k + 8

Which is a correct step to find k and b?

A. Write the points where the graphs of the equations intersect the x-axis.

B. Write the points where the graphs of the equations intersect the y-axis.

C. Add the equations to eliminate k.

D. Multiply the equations to eliminate b.

Answer 1

[AI-generated answer — Bot GPT 3.5]

C. Add the equations to eliminate k.

By adding the two equations together, you can eliminate k and solve for b. The correct step would be to add the equations:

(k + 10) + (-k + 8) = 0

This simplifies to:

20 = 0

Which is not true, indicating that there may be a mistake in the original equations.