Maria sells paintings in an art gallery. she earns $375 each week plus a commission equal to 2.5% of her sales. this week her is goal is to earn at least $500. what is the minimum amount of sales she must have this week to achieve her goal?

She must at least sale $5000 worth of painting

Step-by-step explanation:

Maria sells painting in a art gallery . she earns $ 375 each week plus a commission of 2.5 % of her sales.  Her goal is to earn  at least $500 .

The minimum amount of sales she must have this week to achieve her goal can be calculated as follows:

let a = sales

2.5% = 2.5/100 = 0.025

375 + 0.025(a)  ≥ 500

0.025a ≥ 500 - 375

0.025a ≥ 125

divide both sides by 0.025

a ≥ 125/0.025

a ≥ 5000

She must at least sale $5000 worth of painting

Step-by-step explanation:

The speed of the car is 100/5 = 20 m/sec (speed = distance/time)

1m/sec is 2.237 m/hr. Using the conversion factor the speed of the car is 44.74 miles/hr.