Mathematics, 29.06.2019 15:00 lanamiami

Ineed with number 12 i’m begging on my knees for ☹️

Answers: 2

Show answers

Answers

Answer from: alex6toes

The best buy by unit price is the 16-oz can whose unit price is $0.07/oz.

Step-by-step explanation:

The problem speaks of three sizes of cans, 12 oz, 16 oz, and 24 oz.

The prices of the three sizes of the cans are unknown. We are looking for the best unit cost, or dollars per oz.

Let x = unit cost of the 12-oz can.

Let y = unit cost of the 16-oz can.

Let z = unit cost of the 24-oz can.

The cost of the 12-oz can is 12x.

The cost of the 16-oz can is 16y.

The cost of the 24-oz can is 24z.

The 12-oz can costs $0.16 less than the 16-oz can.

12x = 16y - 0.16

The 16-oz can costs $0.68 less than the 24-oz can.

16y = 24z - 0.68

The unit price of the 24-oz can is $0.005 less than the unit price of the 12-oz can.

z = x - 0.005

There are three equations written in bold above. The form a system of equations in three unknowns. Each unknown is a unit price.

Replace z of the second equation with the third equation.

16y = 24(x - 0.005) - 0.68

16y = 24x - 0.12 - 0.68

16y = 24x - 0.8

Subtract 16y from both sides and add 0.8 to both sides. Then switch sides. You get

24x - 16y = 0.8 (Eq. 1)

Now take the original first equation in bold above. Subtract 12x from both sides. Add 0.16 to both sides. Switch sides. You get.

-12x + 16y = 0.16 (Eq. 2)

Add Eq. 1 and Eq. 2 to eliminate y.

12x = 0.96

x = 0.08

The unit price of the 12-oz can is $0.08/oz.

A 12-oz can costs 12x = $0.96.

12x = 16y - 0.16

0.96 = 16y - 0.16

1.12 = 16y

y = 1.12/16 = 0.07

The unit price of the 16-oz can is $0.07/oz.

z = x - 0.005

z = 0.08 - 0.005

z = 0.075

The unit price of the 24-oz can is $0.075/oz.

The unit prices of the 12-oz, 16-oz, and 24-oz cans are $0.08/oz, $0.07/oz, and $0.075/oz, respectively.

The best buy by unit price is the 16-oz can whose unit price is $0.07/oz.

Answer from: Quest

i wish i could you, i have no idea how to answer this

step-by-step explanation:

Answer from: Quest

-3.5 degrees per hour

step-by-step explanation:

find the unit rate:

-12 1/4 degrees 12.25 degrees

= - = -3.5 degrees per hour

3 1/2 hours 3.5 hours

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 13:10, tommyaberman

What is the smallest integer n such that n\sqrt{2} is greater than 20

Answers: 2

continue

Mathematics, 21.06.2019 17:30, apexdude2020

The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 33 days later). the pool was open on monday, but it was closed on thursday. the high temperature was 30 ∘c on monday, but decreased at a constant rate in the next 33 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.

Answers: 3

continue

Mathematics, 21.06.2019 19:00, lethycialee2427

Write a function for a rotation 90 degrees counter clockwise about the origin, point 0

Answers: 1

continue

Mathematics, 21.06.2019 20:10, dianacastro8298

Gexpressions: practice question 3 of 5 jackson wants to study the popularity of his music video by tracking the number of views the video gets on his website. the expression below represents the total number of views that jackson's video receives n days after he begins tracking the nu views, where b is the rate at which the number of views changes. alb)" select the statement that would accurately describe the effect of tripling a, the initial number of views before jackson beginst the rate at which the number of views changes, b, will triple. the total number of views the video has after n days, a(b)", will not change. the total number of days since jackson begins tracking views, n, will be reduced by one-third. the total number of views the video has after n days, alb)", will triple. submit

Answers: 3

continue

You know the right answer?

Ineed with number 12 i’m begging on my knees for ☹️...