Let's use the "elimination by addition/subtraction" method to solve this system for x and y.
<span> -8x=72-16y
4x=-92+16y <= Mult. all 3 terms by 2: 8x = - 184 + 32y
Now combine the following, column by column:
</span><span> -8x= 72-16y
</span>8x = - 184 + 32y
-----------------------
0 = -112 + 16y. Solving for y, 16y = 112, and y = 7.
Now subst. 7 for y in either of the original equations and calculate x:
<span>4x=-92+16(7) => 4x = -92 + 112 = 20. Then x = 5.
Solution is 5, -7 (or, better written) (5, - 7).</span>
Answer:
1 outta of 4
Step-by-step explanation:
Answer:
62.5 days
Step-by-step explanation:
First, we have to divide 25 pounds by 2 pounds.
25 / 2 = 12.5
Now, we multiply 12.5 by 5 days.
12.5 x 5 = 62.5 days
Answer:
B. C. D. E ALL HAVE FOUR SIDES
