If m + n = 7 and 2n - 3m = 6, what is the value of 3n - 2m ?
2 answers:
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
<span>m + n = 7 then m = 7 - n 2n - 3m = 6 </span><span> substitute </span>m = 7 - n into 2n - 3m = 6 2n - 3m = 6 2n - 3(7 - n) = 6 <span>2n - 21 + 3n = 6 5n - 21 = 6 5n = 27 n = 27/5 n = 5.4 </span><span>m + n = 7 </span><span>m = 7 - n m = 7 - 5.4 m = 1.6 now you have m = 1.6 and n = 5.4 you can find the value of </span>3n - 2m<span> </span>3n - 2m =3(5.4) - 2(1.6) = 16.2 - 3.2 = 13
You might be interested in
Answer:
Ashley would get 100 extra dollars each week
500 X .20 = 100
1. Rhombus 2. Rectangle 3. Trapezoid 4. False 5. True 6. False 7. True 8. True
Answer:
60% would be the correct answer
Step-by-step explanation:
Answer:
so you divide 89 by 56871 this is what i have =0.0015649452