5w+10=40
a)6
b)10
c)30
d)50
10k+5=65
a)12
b)18
c)48
d)72
2b-15=33
a)4
b)9
c)24
d)48
3d+18=21
a)-1
b)1
c)3
d)13

Step-by-step explanation:

5w+10=40

5w=40-10

5w=30

w=30/5

w=6

A) 6

10k+5=65

10k=65-5

10k=60

k=60/10

k=6

k=6

2b-15=33

2b=33+15

2b=48

b=48/2

b=24

b=24

3d+18=21

3d=21-18

3d=3

d=3/3

d=1

d=1

first, we define the variables:

x: number of years after 1950

f (x): amount of vinyl sold.

then, with the variables defined, we have:

68594 vinyl records were sold in 1958 > f (8) = 68594

91299 vinyl records were sold in 1961 > f (11) = 91299

38720 vinyl records were sold in 1952 > f (2) = 38720

161743 vinyl records were sold in 1967 > f (17) = 161743

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step-by-step explanation: