Problem #7 subtract x + 4 from 7x + 1. problem #8 subtract 6x -8 from -4x + 5. problem #9 subtract -6n + 3 from 4n – 1. problem #10 subtract -8n - 3 from -4n – 2.

Problem 7:  6x - 3

Problem 8: -10x + 13

Problem 9:  10n - 4

Problem 10: 4n + 5

Step-by-step explanation:

Problem 7:

Step 1:  "Subtract x + 4 from 7x + 1" can be written as:

     7x + 1 - (x + 4)

Step 2:  Simplifying the expression gives us:

 7x + 1 - x - 4  (distribute the negative sign, 'distributive property')

Step 3:  Simply the new expression by combining like terms:

 7x - x + 1 - 4

     6x - 3

Problem 8:

Step 1:  "Subtract 6x - 8 from -4x + 5" can be written as:

     -4x + 5 - (6x - 8 )

Step 2:  Simplifying the expression gives us:

 -4x + 5 - 6x + 8  (distribute the negative sign, 'distributive property')

Step 3:  Simply the new expression by combining like terms:

 -4x - 6x + 5 + 8

     -10x + 13

Problem 9:

Step 1:  "Subtract -6n + 3 from 4n - 1" can be written as:

     4n + 1 - (-6n + 3)

Step 2:  Simplifying the expression gives us:

 4n - 1 + 6n - 3  (distribute the negative sign, 'distributive property')

Step 3:  Simply the new expression by combining like terms:

 4n + 6n - 1 - 3

     10n - 4

Problem 10:

Step 1:  "Subtract -8n - 3 from -4n - 2" can be written as:

     -4n - 2 - (-8n - 3)

Step 2:  Simplifying the expression gives us:

 -4n - 2 + 8n + 3  (distribute the negative sign, 'distributive property')

Step 3:  Simply the new expression by combining like terms:

 -4n + 8n - 2 +3

     4n + 1

2. angles qrt and qst both measures 156 degrees.

step-by-step explanation:  

we have been given a diagram of a circle and we are told that measure of arc qvt is 156 degrees.  

we can see from our given diagram that angle qrt and angle qst subtends to arc qvt.

since we know that angles subtended by the same arc at the circumference are always equal.

by angle subtended by same arc theorem, measure of angle qrt and angle qst will be equal to the measure of arc qvt.

therefore, angles qrt and qst both measures 156 degrees and 2nd statement is the correct choice.