Answer: $20.30
Step-by-step explanation:
First we must find Mary's total.
3kg × $9.90/kg = $29.70
She gave the cashier $50. So we subtract the total from that to determine the amount of cash or change she should get back.
$50 - $29.70 = $20.30
Answer:
9i
Step-by-step explanation:
Use the product property of radicals to simplify the following radical.
-81 can be break into 81 times -1
that is 81 and -1
as per the product property
square root (-1) is 'i'
square root (81) is 9
Answer:
z=-5
Step-by-step explanation:
divide -77.5 by 15.5, which equals -5
Using proportions, it is found that the scale of the drawing is:
1 inch = 12 yards.
<h3>What is a proportion?</h3>
A proportion is a fraction of a total amount, and the measures are related using a rule of three.
The scale is that 144 yards are represented by 12 inches, hence:
144/12 = 12
Then, 1 inch = 12 yards.
More can be learned about proportions at brainly.com/question/24372153
#SPJ1