Question

A) 3d + 1 for d = -20

b) 4p - 2q for p = 1.4 and q = 1.3
c) b / c for b = 1/3 and c = 2/3

Answer 1

A) Substitute d=-20 into expression
`3d+1:`

`3\cdot (-20)+1=-60+1=-59.`

B) For p=1.4 and q=1.3 the expression
`4p-2q` takes look

`4\cdot 1.4-2\cdot 1.3=5.6-2.6=3.`

C) If
`b=(1)/(3)` and
`c=(2)/(3),` then

`(b)/(c)=((1)/(3))/((2)/(3))=(1)/(3):(2)/(3)=(1)/(3)\cdot (3)/(2)=(1\cdot 3)/(3\cdot 2)=(1)/(2).`