All categories

3 years ago

I need help please with number 12 please I’m begging on my knees for help☹️

Mathematics

2 answers:

Taya2010 [7]3 years ago

3 0

Answer: i did the math and i think it's the best bet bc i got 75 cents and the rest is highier

Step-by-step explanation:

skelet666 [1.2K]3 years ago

3 0

Answer:

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

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.

You might be interested in

If the domain of a function is [1,10), select a point that could be included within the function.

bazaltina [42]

Answer: (1,4)

Explanation: The domain looks at the x coordinates and (1,4) is the only x coordinate in the range given (due to the bracket)

6 0

3 years ago

Read 2 more answers

Me. Ellis is a teacher who tutors after school. Of the students he tutors, 30% need help in computer science and 70% need assist

Anna11 [10]

Answer: There are 82.5% after school students who are enrolled in his classes.

Step-by-step explanation:

Let the total number of students be 100

Percentage of students who need help in computer science = 30%

So, number of students who need help in computer science = 30

Percentage of students who need help in maths = 70%

So, number of students who need assistance in maths = 70

Of the students who need help,

40% are enrolled in Mr. Ellis's class during the school day,

So, it means 60% are enrolled in his class after the school day.

Number of students who are enrolled in his class after the school day = 60

Number of students who need help in Maths is given by

$\frac{70}{100}\times 60=42$

Of the students that need help in maths, percent of students are enrolled in his class during the day = 25%

So, number of students who need help in maths and enrolled in his class after school hours

$\frac{75}{100}\times 42=31.5$

Number of students who need help in computer science and enrolled in his class after school hours

$\frac{30}{100}\times 60=18$

Therefore, there are $31.5+18=49.5$ students who joined his class after school hours,

Percentage of the after students who are enrolled in Mr. Ellis's classes is given by

$\frac{49.5}{60}\times 100=82.5\%$

Hence, there are 82.5% after school students who are enrolled in his classes.

6 0

3 years ago

Consider the function below. g(x) = 4x − 1 Find the difference quotient below (where h ≠ 0) and simplify your answer. g(x + h) −

eimsori [14]

Answer:

The difference quotient is 4.

Step-by-step explanation:

Given that:

$g(x) = 4x - 1$

To find:

Difference quotient = ?

where $h \neq 0$

Solution:

Formula for Difference quotient is given as:

$\dfrac{g(x+h)-g(x)}{h}$

First of all, let us find out $g(x+h)$

Replacing $x$ with $x+h$

$g(x+h) = 4(x+h)-1 \\\Rightarrow g(x+h) = 4x+4h-1$

Now,

$g(x+h)-g(x) = (4x+4h-1 )-(4x-1)\\\Rightarrow g(x+h)-g(x) = 4x+4h-1 -4x+1\\\Rightarrow g(x+h)-g(x) = 4h$

Putting the above value in:

$\dfrac{g(x+h)-g(x)}{h} = \dfrac{4h}{h}$

We are given that, $h \neq 0$

$\therefore \dfrac{4h}{h} = 4$

So, the difference quotient is 4.

3 0

2 years ago

Every month I increase the amount of cupcakes

Orlov [11]

Answer:2

Step-by-step explanation: it increases by 2 every month

4 0

2 years ago

Find the value of x.

Colt1911 [192]

Answer: x=4

Step-by-step explanation: write down 11x-2+9x+1=19x+3, then combine the like terms... 20x-1=19x+3, then subtract 19x from both sides which will give you x-1=3, and 4-1=3 so x=4

3 0

2 years ago