Answer:
Hey there!
The expression is 2(7)+3(9)+5(4).
Let me know if this helps :)
Answer:

Step-by-step explanation:

Subtitute y in the first equation.

Now replace x in either equation to find y.

Answer:
3/-1
Step-by-step explanation:
The slope is 3/-1 (Rise 3 on the y axis, run to the negatives by 1 on the x axis)
To find the slope of two points, use the formula of y2-y1/x2-x1 (For example, with this equation it would be 10-4/10-12)
I'm not sure what it means to interpret the slope, but hopefully this helped you!
Answer:
201cm
Step-by-step explanation: