Let's write it down in mathematical terms:
x-y=5
so
x=5-y
this means:difference between two numbers is 5
2y=x+18
this means: twice the smaller number is 18 more than the larger number
and we can substitute the x for what we said before:
2y=(5-y)+18
we add 1 y from each side:
3y=5+18
3y=23
so the smaller number is 23 and the bigger number is 23+5=28.
The volume is 40
8x1x5=40
:)))))))))))))))))))))))
Answer:
x = -7
, y = 5 thus D)
Step-by-step explanation:
Solve the following system:
{4 x - 4 y = -48 | (equation 1)
5 x - 6 y = -65 | (equation 2)
Swap equation 1 with equation 2:
{5 x - 6 y = -65 | (equation 1)
4 x - 4 y = -48 | (equation 2)
Subtract 4/5 × (equation 1) from equation 2:
{5 x - 6 y = -65 | (equation 1)
0 x+(4 y)/5 = 4 | (equation 2)
Multiply equation 2 by 5/4:
{5 x - 6 y = -65 | (equation 1)
0 x+y = 5 | (equation 2)
Add 6 × (equation 2) to equation 1:
{5 x+0 y = -35 | (equation 1)
0 x+y = 5 | (equation 2)
Divide equation 1 by 5:
{x+0 y = -7 | (equation 1)
0 x+y = 5 | (equation 2)
Collect results:
Answer: {x = -7
, y = 5
3*6>2*6+5
18>17
6 is the answer
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