Mathematics High School

PLEASE HELP ME WITH THIS PROBLEM

Drew and Stephen shopped together for school supplies. Drew bought 16 pencils and 8 pens for $20.88. Stephen purchased the same items, but he bought 12 pencils and 4 pens for $13.40.

What was the cost of one pen?

Answers

Answer 1

Answer:

Step-by-step explanation:

16x + 8y = 20.88

12x + 4y = 13.40

Solve for x and y

x is the cost of 1 pen

Related Questions

If 12 candy canes cost $318, what will be the cost of 4 candy canes?​

Answers

Answer:

4 candy canes = $ 106

Step-by-step explanation:

Using unitary method to solve this question.

Given that:

12 candy canes = $ 318

Divide both sides by 12

1 candy cane = $318/12

1 candy cane = $26.5

Now, Multiply both sides by 4

4 candy canes = $ 26.5 * 4

4 candy canes = $ 106

[tex]\rule[225]{225}{2}[/tex]

Hope this helped!

~AH1807

To avoid a storm, a passenger-jet pilot descended 0.57 mile in 0.6 minute. What was the plane's average change of altitude per minute?​

Answers

Answer:

0.95 miles/minute

1
A line has a slope of -2 and a y-intercept of -2.

What is the x-intercept of the line?
A -4
B -1
C 1
D 4

Answers

Answer:

B

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Here m = - 2 and c = - 2 , then

y = - 2x - 2 ← is the equation of the line

To find the x- intercept let y = 0 in the equation and solve for x , that is

- 2x - 2 = 0 ( add 2 to both sides )

- 2x = 2 ( divide both sides by - 2 )

x = - 1

The x- intercept is - 1 → B

Which point would be a solution to the system of linear inequalities shown below?

Y>2/3x-4
​
Y<−4x−6

Answers

2/3x-4 im not all the way sure

Find how many square feet of grass are in the plot shown on the right.

Answers

5,850 sq. ft
Hope this is helpful!

Answer:

5,850 sq. ft

Step-by-step explanation:

this question


please help please

m=n+4b

Answers

Answer:

m=n+4b:- b=m-n/4.........

2. What is the equation of a line that has a slope of 3 and passes through the point(-1,4)?
y + 4 = 3(x - 1)
y - 1 = 3(x + 4)
y + 1 = 3(x – 4)
y – 4 = 3(x + 1)

Answers

Answer:

last one

Step-by-step explanation:

point slope form:

[tex](y - y1 )= m(x - x1)[/tex]

just plug in the numbers and you will get the answer:

[tex](y - 4) = 3(x + 1)[/tex]

ben's grandma gave him $75 in a new piggy bank. Ben will add $15 to his piggy bank each month. find x, the number of months Ben must add $15 until he has more than $225 in his piggy bank.

Answers

10 Months is the answer or it’ll be X=10

A recursive rule for an arithmetic sequence is a1 = −4; an = an−1 + 11

a. What is a1?

b. What is d?

c. What is the iterative rule for the arithmetic sequence above? You do NOT need to simplify.

d. Find a10

Answers

It’s a for sure I really think it’s A i don’t know

What is the graph of the function rule? y=|3x|+2

Options below!

Answers

Answer: the 4th/last option

Step-by-step explanation:

Y goes up when x goes down or up. When x = 0, y = 2

Step-by-step explanation: I like to have the 3 on the

outside and we can just write it as y = 3|x| + 2.

Now, we know that this is the form y = a|x - h| + k where

(h, k) represents the vertex of the function.

Notice that there is no value of h so we say that h = 0.

In addition, we know that k = 2 so our vertex is (0, 2).

This eliminates the first graph and the third graph.

Since a is positive, our function opens upward.

So graph 4 matches with our equation.

Malcolm took 18 minutes to do 15 math problems. Diedra took 17 minutes to do 16 math problems. Which student did more problems per minute?

Answers

The student that did more maths problems per minute is Diedra.

In order to determine which student did more maths problems per minute, the rate of each student has to be determined. Rate is the total questions solved divided by the time.

Rate = total questions / total time

Malcolm = 15 / 18 = 0.833 problems per minute

Diedra = 16/ 17 = 0.941 problems per minute

To learn more about rate, please check: brainly.com/question/9834403

compare:
1. 4 3/8 (__) 4 7/10
2. 3/10 (__) 25/100
3. 5/8 (__) 3/5
4. 8/12 (__) 6/9
Help me please, and thx for the help

Answers

1. > 7/10 = 70% and is more than 3/8.
2.> 3/10 is equal to 30% which is more than 25%
3. > 5/8 is equal to 25/40 and 3/5 is equal to 24/40
4. = 8/12 is equal to 72/108 and 6/7 is equal to 72/ 108 too

1) 4 3/8 < 4 7/10

2) 3/10 > 25/100

3) 5/8 > 3/5

4) 8/12 = 6/9

hope this is helpful!

For f (x) = 2x - 1 evaluate f(-8)

Answers

Step-by-step explanation:

f(x) = 2x - 1

Putting value of x = - 8

f(-8) = 2(-8) - 1

= - 16 - 1

= - 17

F(-17) because you plug -8 into x so 2•-8-1 which then times 2 and -8 get -16, then -16-1 is -17, have a good day/night!!

PLLSSS HELP MEEEE!!

Is it possible for Bruce and Felicia to have used the same number of tiles? Use complete sentences to explain your reasoning.

Number of tiles Bruce used: 5x + 2
Number of tiles Felicia used: 5x + 5

Answers

Answer:

No it is not possible for Bruce and Felicia to have used the same number of tiles.

Step-by-step explanation:

Bruce would have used 10x of tiles and Felicia used 7x of tiles.

No, it is not possible that Bruce and Felicia to have used the same number of tiles

The expression which shows the difference is (n² - 2)/2n, the correct option is B.

What is an Expression?

An expression is a mathematical statement which consists of variables, constants and mathematical operators.

Number of tiles Bruce used: 5x + 2

Number of tiles Felicia used: 5x + 5

On equating the two expressions

5x+2 = 5x+5

There is no solution

At any value of x, Bruce would have always used 3 tiles less than Felicia.

To know more about Expression

https://brainly.com/question/14083225

#SPJ2

Pls Help T^T ASAP FIRT TO ANSWER GETS BRAINLIEST

Answers

Answer:

The answer would be the third one shaded circle at -1 arrow goes left.

Trevor paid a total of $1.08 in fines for an overdue library book. If the penalty for overdue books is $0.09 per day, how many days late was the book?
2 days
8 days
12 days
20 days

Answers

Answer:

12

Step-by-step explanation:

You have to divide the total by the number per day to solve this problem.

1.08/0.09=12

what is 3/7-7/14 as a fraction

Answers

-1/14
hope this is helpful!

Answer:

-1/14or-0.07

Step-by-step explanation:

3/7-1/2=(2x3)/(2x7)-(7x1)/(7x2)=6/14-7/14=(6-7)/14=-1/14or0.07

Help!!
So I think that someone is tracking my truck with an apple airtag but I don't know for sure. The only apple product I have is an iPad and I don't know how to check if an airtag is near by!!

Answers

Answer:

well....

Step-by-step explanation:

trow the apple

solve the inequality and graph its solution.

Answers

Answer:

D

Step-by-step explanation:

Hope this helped! :D

is y=3/4x proportional or non proportional

Answers

Yes, it’s proportional. it’s proportional because when you graph the equation it’s a straight line the goes through the origin! brainliest is always appreciated :)

113 + 377 = 117 + _

Pls answer guys.

Answers

Answer:

373

Step-by-step explanation:

113+377=490

490-117=373

answer:

=117+373

If there are 18 boys and 54 gurls in a room,fill out a of the possible ratios of boys to girls that could be made

Answers

Answer:

2:6 and 1:3.

Step-by-step explanation:

18 divided by 9 = 2

54 divided by 9 = 6

18 divided by 18 = 1

54 divided by 18 = 3.

Hope that helps. x

Answer : 1:3, 2:6, 3:9, 4:12, 5:15, 6:18, 7:21, 8:24, 9:27, 10:30, etc . . .

Step - by - step explanation :

18:54 divided by 6/6 = 3:9

3:9 divided by 3/3 = 1:3 <-- simplest form :D

12. Fancy goldfish x cost $3 each and
common goldfish y cost $1 each. Graph
the function y
20
3x to determine
how many
of each type of goldfish Tasha
can buy for $20.

Answers

Answer:

x (Fancy Gold fish) = 3

y (Common goldfish) = 29

Step-by-step explanation:

Fancy goldfish x cost $3 each

common goldfish y cost $1 each

Graph: y  = 20 +  3x (I'm hoping this is the correct line equation, please do leave a comment below if it's not)

Thus, we graph it by subtitude either the x or y values. (Or you can use just X = 1,2,3).

Now, to find how many of each type of goldfish Tasha can buy. We subtitude the line equation by either using x = 3 or y = 1

Using either values to solve the equation, we get:

x = 3

y = 29

Hope this helps!

Solve for y. 4/7 y + 2/7 = 6

A) y = 20
B) y = -10
C) y = 10

Answers

Answer:

C) y = 10

Step-by-step explanation:

Subtract 2/7 from each side

4/7y = 40/7

Divide both sides by 4/7 (Multiply by 7/4)

y = 10

Answer:

C) y=10

Step-by-step explanation:

4/7y+2/7=6

7(4/7y+2/7)=7(6)

4y+2=42

4y=42-2

4y=40

y=40/4

y=10

Use the diagonals to determine whether a parallelogram with vertices A(2, 7), B(7, 9), C(5, 4), and D(0, 2) is a rectangle, rhombus, or square. Give all the names that apply.

Answers

Step-by-step explanation:

A and B have among each other the same distance relation as D and C : +5 in x, and +2 in y direction

and D and A have among each other the same distance relation as C and B : +2 in x, and +5 in y direction.

that means the slope of the first pair of sides is 2/5, and the slope of the second pair of sides is 5/2.

and that means that these 2 pairs of lines are not perpendicular (for this not only would we need to have the ratio upside down but also the sign would need to be flipped). there are no 90° angles.

so, there is no rectangle or square.

but because the sums of x and y coordinate differences are the same, we have the same distances between neighboring points.

and that makes it a rhombus.

Write a two- column proof.

Given: 3x = x + 12
Prove: x =5​

Answers

3x-x=12
2x=12
x=12/2
x=6

I really really really need help with this

Answers

Answer:

404

Step-by-step explanation:

PEMDAS48 ÷ 6 + (5×6) × 13 + 6 =            → Parenthesis48 ÷ 6 + 30 × 13 + 6 =                → Multiplication, division8 + 390 + 6 =                              → Addition404

[tex]\huge \bf༆ Answer ༄[/tex]

Use PEDMAS/BODMAS rule for simplification !

Let's solve ~

[tex] \sf{48} \div 6 + (5 \times 6) \times 13 + 6[/tex]

[tex] \sf48 \div 6 + 30 \times 13 + 6[/tex]

[tex] \sf8 + 30 \times 13 + 6[/tex]

[tex] \sf8 + 390 + 6[/tex]

[tex] \sf404[/tex]

which ratio is equivalent to the ratio 7:6

Answers

Answer:

B. 21:18

Step-by-step explanation:

7/6 x 3 = 21/18

This means they are equivalent.

Answer:

Option B is correct.

Step-by-step explanation:

Let's first turn 7:6 into a fraction:

=> 7:6 = 7/6

Now, let's simplify all the options to see which one is the correct answer.

Option A:

=> 14:18=> 14/18=> 7/9=> 7/9 ≠ 7/6

Therefore, Option A is incorrect.

Option B:

=> 21:18=> 21/18=> 7/6=> 7/6 = 7/6

Therefore, Option B is correct.

Option C:

=> 21:12=> 21/12=> 7/4=> 7/4 ≠ 7/6

Therefore, Option C is incorrect.

Option D:

=> 18:14=> 18/14=> 9/7=> 9/7 ≠ 7/6

Therefore, Option D is incorrect.

We can conclude that Option B is correct.

[tex]BrainiacUser1357[/tex]

Find the midpoint of the segment with the following endpoints. (10,6) and (4,9)​

Answers

Answer:

(7,7.5)

Step-by-step explanation:

midpoint formula:

(10+4)/2=7

(6+9)/2=7.5

(7,7.5)

I need help to find the radius

Answers

Answer:

Step-by-step explanation:

i think 0.6

Other Questions
What is the equation of this graphed line?Enter your answer in slope-intercept form in the box. there are nine children and Kenneth preschool class three of them chose to play at the sand table based on past data is 12 preschoolers are at school today how many should you expect to play at the sand table do you have to pull over for an unmarked police car i need help with the problem below Please help Ill give brainliest ASAP A hot-air balloon is tied to the ground with two taut ropes. One rope is directly under the balloon and makes a right angle with the ground. The other rope forms an angle of 60 with the ground. Which statements are correct?A) d 60 ft.B) d 66 ft.C) h 104 ft.D) h 108 ft.E) angle of depression = 30 i putted it on english because i didnt ssee scienceChanges in the amount of _______________ caused big changes in the prairie balance of nature.chemicalscarbon dioxiderainfall explain karma in Hinduism with one paragraph explain what it is and how it works I will give brainliest What is 39,800,000 in scientific notation? A. 3.98 x 10 B. 398 x 10 C. 3.98 x 10 D. 39.8 x 10 which layer of earth is in the liquid state of matter? which is bigger 0.5 or 9% A court document is an example of a secondary source true or false? Part of a bridge spans a river 35 metres wide. One third of the length of the bridge is on one side of the river and 20% of the length of the bridge is on the other side. what is the relationship between the amplitude of light of light waves and brightness 5. Layer of Earth consisting of crust & upper layer of mantle ________ on a coordinate plane, triangle a b c is shown. point a is at (negative 1, 1), point b is at (3, 2), and points c is at (negative 1, negative 1)if line segment bc is considered the base of triangle abc, what is the corresponding height of the triangle? Which equation represents a line that is perpendicular to the line represented by 2x - y = 7? What is the relationship between layering of fluids and density? Why does atomic radii decrease as you move from the left to right across the period The piecewise function f(x) has opposite expressions. F(x) = startlayout enlarged left-brace 1st row 1st column 2 x minus 1, 2nd column x less-than 0 2nd row 1st column 0, 2nd column x = 0 3rd row 1st column negative 2 x + 1, 2nd column x greater-than 0 which is the graph of f(x)?.