Since m + n = 7 we know m = 7-n. So now we have 2n - 3(7-n) = 6. From this we get n = -3. So now we know m - 3 = 7 so m = 10. So now we have 3(-3) + 2(10) = ? and this comes out as 11
Just plug in 4 for the x
2*4 +4y =36
8+4y =36
4y =36-8
4y=28
y= 28/4
y=7
It is a polynomial, and the degree is quartic
hope this helps
0.6 as a fraction in simplest form is 3/5
30/100× 250 = 70
250 - 70 = 180
agree, he'll save up to $70 and get the ipod at price $180