Question

evaluate each expression when ( x=\frac{3}{4} ) and ( y = 2.5 ). (example 1)

1. ( 8x )

evaluate each expression when ( a=\frac{2}{3}, b=\frac{4}{5} ), and ( c = 6 ). write in simplest form. (example 2)

1. ( a + b )

evaluate each expression when ( a = 4, b = 3 ), and ( c=\frac{1}{3} ). (example 3)

1. ( (3a + 18c) div b^{2} )
2. the expression ( \frac{1}{2}a(b + c) ) can be used to find the area of the trapezoid. what is the area of the trapezoid when ( a = 5.5, b = 5 ), and ( c = 7.2 )? (example 4)
3. the perimeter of a rectangle can be found using the expression ( 2ell+2w ), where ( ell ) represents the length and ( w ) represents the width. find the perimeter when ( ell = 6.2 ) units and ( w = 3.5 ) units.

test practice

1. equation editor what is the value o expression when ( x = 7, y=\frac{1}{2} ), and ( z ) (example 3)

( (24y + 2x) divleft(\frac{1}{4}z
ight) )

Explanation:

Answer:

1. \( 6 \)
2. \( 6.25 \)
3. \( 4 \)
4. \( \frac{22}{15} \)
5. \( \frac{26}{5} \)
6. \( \frac{2}{15} \)
7. \( 2 \)
8. \( 1 \)
9. \( \frac{14}{9} \)
10. \( 30.5 \)
11. \( 22 \)
12. \( 19.4 \) units