3 years ago

Plz help and show work

Mathematics

1 answer:

scoundrel [369]3 years ago

8 0

Answer: If the 40% off coupon is used, the subtotal will be $12.69

The gratuity would be exactly $4.23 (He will probably leave $4.25)

Step-by-step explanation: To find out the amount of the discount

.40 × 21.15 = 8.46

To find the new subtotal, subtract 12.15 - 8.46 = 12.69

To figure the tip: .20 × 21.15 = 4.23

Changing the percent to a decimal means divide the 20 by 100.

You might be interested in

On the blueprint of a house, 38 millimeters represents 6 meters. the length of the living room is 57 millimeters on the blueprin

Pie

For this case we can make the following rule of three:
38 milimeters ---------> 6 meters
57 milimeters ---------> x
Clearing x we have:
x = (57/38) * (6)
x = 9 meters
Answer:
the current length of the living room is:
x = 9 meters

3 0

4 years ago

THIS IS URGENT I NEED HELP ASAP.(9x 10^-3)^2

joja [24]

(9x 10^-3)^2= $\frac{81x^{2}}{1000000}$ , so d 8.1x10^-6

Evaluate 1/2a^-4b^2 for a =-2 and b=4

$\frac{1}{2} (-2)^{-4} *4^{2}\\\\\frac{1}{2} *\frac{1}{(-2)^{4}} *4^{2}\\\\\frac{1}{2} *\frac{1}{2^{4}}*4^{2}\\\\\frac{1}{2} *\frac{1}{16}*4^{2}\\\\\frac{1}{2} *\frac{1}{16}*16=\frac{1}{2}$