Amal has a bookcase with n shelves. There are 15 books on each shelf. Using n, write an expression for the total number of books.

15n

Step-by-step explanation:

Amal has a bookcase with n shelves. There are 15 books on each shelf. Using n, write an expression for the total number of books.

The expression for the total number of books is given as:

Number of shelves × Number of books in each shelf

= n × 15 books

= 15n

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.

60%