# Mathematics

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Tito Sanchez receives a weekly salary of \$400. he also receives a 6% commission on the total dollar amount of all sales he makes. What must his total sales be in a week if he is to make a total of \$790?

• Mathematics -

if sales = x, then salary s is given by

s = 400 + .06x

If s=790, then

790 = 400 + .06x
390 = .06x
x = 6500

• Mathematics -

Petsmart has sale offering 10% off of all pet supplies. If Amanda Miller spent 15.72\$ on pet supplies before tax, what was the price of the pet supplies she purchased before discount?

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