could someone please check these problems for me?

Question

thank you!
1. Soybean meal is 16% protein; cornmeal is 8% protein. How many lbs of each should be mixed together in order to get 320 lb mixture that is 9% protein/
A: cornmeal- 40lbs
soybean-280 lbs

2. -0.7x<-35
A: x>50

3. 2+4x<14
A: x<3

4. 8x-(2x+8)=34
A:x=7

5. 5/4x+1/8x=11/8+x
A:x=11/3

Answer 1

1. Correct
2. Correct
3. Correct
4. Correct
5. Correct
They're all right. Good job!

Answer 2

thats like exactly what we are hittin up in algebraa

Answer 3

Soybean meal is 16% protein: cornmeal is 8% protein. How many pounds of each should be mixed together in order to get 320-lib mixture that is 15% protein?