Tom earns $40 a week mowing lawns. He spends 1/10 of his earnings on lunch and 4/5 of his earnings on music. He saves the rest. How many dollars does Tom save?

$4

Step-by-step explanation:

Tom earns $40 a week when he now lawns.

Amount earned by Tom= $40

Fraction spent on lunch= 1/10

Fraction spent on music= 4/5

Fraction saved= 1-(1/10 + 4/5)

= 1-(1/10+8/10)

=1-(9/10)

=1/10

Amount saved = 1/10 × 40

= $4

Tom saves $4 out of the weekly amount he means by mowing lawns.

a - base

b - exponent

so,