How do you solve number 2 on page 28 with the plugging in method?

# Could you help me on number 9 on page 70 please? I kept getting a 4.312 answer

Could you help me on number 9 on page 70 please? I kept getting a 4.312 answer

# Could you help me number 10 on page 70 please? I kept getting 0 as the answer

Could you help me number 10 on page 70 please? I kept getting 0 as the answer

# Could you help me on number 4 of page 69 please? I forgot how to set up the equation

Could you help me on number 4 of page 69 please? I forgot how to set up the equation

# Help on number 5 on page 69 please

Help on number 5 on page 69 please

# Would you please help me with number 8 on page 56 please?

Would you please help me with number 8 on page 56 please?

# Could you please help me with question 2 on page 55 please? I got a>b and I don’t understand why it is a<b.

Could you please help me with question 2 on page 55 please? I got a>b and I don’t understand why it is a<b.

# Could you help me with question 9 on page 38 please?

Could you help me with question 9 on page 38 please? I don’t understand how to solve it even using back-solving

# I am very confused about why the answer question 5 on page 28 is A…

I sorry I am very confused about why the answer question 5 on page 28 is A would you help me please?