3. Adam bought 3 pens and 4 pencils for $4.25. Lily bought 2 pens and 6 pencils for $4.50. How much is a pen? a pencil?​

Answers

Answer 1
Make two equations
Let x = pen
Let y = pencil
3x + 4y = 4.25
2x + 6y = 4.50
Make both coefficients equal
(3x + 4y = 4.25) * 2
(2x + 6y = 4.50) * 3
6x + 8y = 8.5
6x + 18y = 13.5
Subtract both sides
-10y = -5, y = 0.50
3x + 4(0.50) = 4.25
3x + 2 = 4.25
3x = 2.25, x = 0.75

Pen = $0.75
Pencil = $0.50

Related Questions

HELPPPPZ WORTH 30 POINTS AND BRAINLIEST

Answers

You don't need help my dude, you already have all of the right answer. Good job!!!

yuppp good jobbb!!!!

The temperature was 48°F and dropped 15° in two hours.
What was the temperature after the change?

Answers

Answer:

33 degrees Fahrenheit.

Step-by-step explanation:

If the temperature was 48 degrees, and it dropped 15, that means the initial temperature was subtracted by 15.

48 - 15 = 33.

Answer:

33°F

Step-by-step explanation:

The initial temperature was 48°F. Then, it dropped by 15°.

I am assuming that both values are given in the same unit.

48 - 15 = 33

The temperature should be 33 degrees now.

Hope this helps.

Can anyone help me with #1 and #2 and #7 and #8 please I will mark brainlist!!!

Answers

Step-by-step explanation:

For #7 and #8, they have given you the answer of the product but without decimals.

You can just add up all the decimal places for this kind of multiplication.

For example, 6.543 and 2.6 have 4 decimal places in total (underlined), so just count four: 17.0118.

If m = 100 what is the value of q?
q = 21.344 m


A. 213.44

B. 2,134.4

C. 21,344

D. 213,440

Answers

Answer:

The Answer is gonna be C. 21,344

Answer:

B) 2134.4

hope it helps.....

How do you solve an equation?

Answers

Answer:

What kind of Equation?

Quadratic Equation.

Linear Equation.

Radical Equation.

Exponential Equation.

Rational Equation.

help please i will mark brainliest

Answers

This is a 30 60 90 triangle. So it equals 2.

Answer:

The answer is 8.66054037 as a decimal. It's asking for a root though.

Step-by-step explanation:

Help thank you ! Elimination method

Answers

Answer:

x=0

y=7

Step-by-step explanation:

Divide 6x-4y=-28 by -2..... -3x+2y=14

3x+5y=35

-3x+2y=14

--------------

7y=49

y=7

6x-4*7=-28

x=0

How would I be able to solve for x?

Answers

Use tangent, sine, and cosine. Try it, if you don’t get it, I can help further. Hope this helps

Complete the table for the given rule.
Rule: y = 52

Answers

~Answer~

Substitute your numbers:

y = 5x

For the first one, y equals 5, so substitute 5 for y.

So, 5 = 5x.

What multiplied by 5 gives 5? The answer is 1.

So, the first one is 1.

Do the same for all the others.

So, 4 = 5x.

4 = 5(4/5)

As a decimal that equals 0.8.

For the last one, I can't tell if that is saying 2 or .2 so I'll do both.

for 2, you will do 2 = 5x and for .2, you will do .2 or 0.2 = 5x.

For 2, it would be 2/5 or 0.4.

For .2 or 0.2, it would be 0.04.

So,

x                                                             y

1                                                             5

4/5 or 0.8                                             4

0.4 if it is 2 and 0.04 if it is 0.2.        2

(looking back, I'm pretty sure it was just 2 and not .2)

I hope this is what u were looking for, if not I'm so sorry for a useless answer.  I wasn't completely sure whether I was doing it right since I haven't done these types of math problems in some time.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Which of the following is a solution to the equation2/3 x + 16 = -14?

Answers

Answer:

x= -45

Step-by-step explanation:

Please simplify. IF U TRY TO SCAM ME WITH A LINK OR A NON ANSWER, I REPORT!!

Answers

Answer:

1. 192 or 12^4       13. 4c^7 d^13

2. 8x^6                 14. 16f^10 g^22

3. x^8                    15. x^4y^4

4. 4x^5                  16. xy

5. 6^2                    17. x^12/64y^9

6. 1/x^3                  18. x^8/256y^16

7. 1                         19. 1/y^7

8. -1                        20. 1/49

9. y^12                    21. x^5

10. x^8y^4              22. 16

11. 3x^3                   23. x^4

12. 2x^3                  24. 1/x^6

                               25. x^2

                               26. 1/j^3

Hope this helps! :)

Which statement is true about the equation

It has no solution.
It has one solution
It has two solutions.
It has infinitely many solutions.

Answers

Answer:

it has one solution which is 4

Answer:

hope this helps you......

The volume of a sphere can be calculated by V = 4/3 * pi If the volume is 113.04 cm ^ 3 what is the radius?

Answers

Answer:

2.99 cm

Step-by-step explanation:

V= [tex]\frac{4}{3}[/tex](pi)(r^3)=113.04cm^3

113.04/ [tex]\frac{4}{3}[/tex](pi) = r^3 = 26.99

r=[tex]\sqrt[3]{26.99}[/tex] = 2.99cm

Answer:

Step-by-step explanation:

Answer is 3

A bag of marbles contains only purple and yellow marbles. The bag has three times as many yellow as purple, the bag contains 164 total marbles

HOW MANY PURPLE MARBLES DOES IT CONTAIN??

Answers

Answer:

41 purple marbles

Step-by-step explanation:

x= amount of purple marbles

3x+x=164

4x=164

x=164/4=41

Please help, Describe two methods that can be used to find the area of the composite figure.

Answers

A composite figure is made up of several simple geometric figures such as triangles, rectangles, squares, circles, and semicircles. To find the area of a composite figure, separate the figure into simpler shapes whose area can be found. Then add the areas together.

Area of the composite figure can be find by using additive areas method and subtractive areas method

What is Composite figure?

Composite geometric figures are made from two or more geometric figures. The composite figure below is made from parts of a rectangle and a circle

Since, Area is the quantity that expresses the extent of a region on the plane or on a curved surface.

Area of the composite figure can be find by using two methods,

Additive areas method and Subtractive areas method

In Addictive areas method

Break the composite shape into basic shapes

Find the area of the each basic shapes

Add all the areas of basic shapes together

In Subtractive areas method

Break the composite shape into basic shapes. That shape maybe larger than the composite shapes.

Find the area of the each basic shapes

Area of the composite shape will be the difference between the area of the larger shape.

Hence, the area of  the composite figure can be find by using additive areas method and subtractive areas method

Learn more about Composite figure here;

brainly.com/question/16193772

#SPJ2

PLZZ HELP Me ASAP!!!!

Answers

Answer:

see explanation

Step-by-step explanation:

(a)

The area is calculated as length × breadth

area = 2x(2x + 6) ← distribute

       = 4x² + 12x

(b)

area = x(x + 4) ← distribute

       = x² + 4x

(c)

shaded area = 4x² + 12x - (x² + 4x)

                      = 4x² + 12x - x² - 4x ← collect like terms

                      = 3x² + 8x

Please help link=report it worth 15 points and you’ll get brainiest if it right

Answers

Answer:

d) none of these lines fit the data

Answer:

This has to be D - None of the lines fit the data

B > data at the end

A > data at the beginning

C doesn't really match at all.

[tex]\mathtt{: )}[/tex]

NEED HELP
On a unit test in a statistics class, the teacher determines that the mean test grade was 77.5 with a standard deviation of 5.2. One student’s test grade was 91. What is the z-score for the student’s test?

–5.20
–2.60
2.60
5.20

Answers

Answer:

2.60

Step-by-step explanation:

z-score is the difference between the score and mean, divided by the standard deviation.

[tex]z = \frac{x - \mu}{\sigma}[/tex]

[tex]z = \frac{91-77.5}{5.2} = \frac{13.5}{5.2} \approx 2.596[/tex]

So 2.6 is an answer close enough.

Please answer fast!!!!!

Answers

Answer: the answer is

b. Triangle

LCM of 4, 6, 10, and 12

Answers

Answer:

360 is the LCM of 4,6,10 and 12

1-4) What is the point of intersection?

Answers

Answer:

Step-by-step explanation:

Philip has a box of crayons. 45 are yellow, 12 are green, 25 are blue, and 8
are red. If Philip selects a crayon at random, what is the probability of not
picking a green? *
a. 1/2
b. 5/18
c. 2/15
d. 13/15

Answers

Answer:

option d

Step-by-step explanation:

First we find the probability of getting green, then we can subtract the result from 1 to find the probability of not getting the green crayon

P( green )    

[tex]\frac{12}{45+12+25+8} \\= \frac{2}{15}[/tex]

P '(green) = 1 - 2/15

= 13/15

When you roll 2 die, what is the probability of the event: Two numbers are odd and the sum is less than 5.

Answers

Answer:  1/12

==========================================================

Explanation:

Let's use (x,y) notation to denote the results of the two dice. So x is the first dice value and y is the second. Something like (2,1) means we rolled a '2' on the first die, and a '1' on the second die. The order matters.

We want both x and y to be odd, and we also want x+y < 5.

Here are all of the ways to fit those conditions:

(1,1)(1,3)(3,1)

There are 3 ways to achieve this goal out of 6*6 = 36 ways to roll two dice without any restriction. The probability we're aiming for is 3/36 = 1/12

Side note: 1/12 = 0.0833 = 8.33% approximately.

¡please help!
The solutions of the equation -x2 +1 = 0 are
and x =

Answers

Answer:

x = 1, x = -1

Step-by-step explanation:

-x² = -1

x² = 1

x = ±1

helpp. Pleasee need answerr

Answers

Answer:

This probaly sounds a little confusing

Step-by-step explanation:

1 day = 10 laps

1 lap = 400 meters

1 km = 1000 meters

12 km = ? days

We can use this information to find out a lot that we don't know.  

HOW MANY METERS PER DAY??

In order to find the number of meters in a day, we think, "She ran 400 meters 10 times... 400 times 10... that's 4000 meters in one day."

1 day = 4000 meters (10 x 400 meters)

HOW MANY KILOMETERS PER DAY?

In order to find the number of km in a day, we can think, "One thousand is a kilo. There are 4 'one thousand's in 4000. Kali ran 4 kilometers (literally 4 thousand meters) per day.  

1 day = 4 km (4000 m / 1000)

 

From here you can solve simply by thinking "How many 4km does it take to get to 12km?"

4 x ? = 12

? = 12 / 4

? = 3

43.5% of this skeleton's body is his mermaid tail.
Write the percent as a decimal.
Type a number

Answers

You would do 43.5/100 and you would get 0.435

Find the area of the quadrilateral below. Formula is: A=1/2h(b1+b2)!!

Answers

Answer:

2.6 in^2

Step-by-step explanation:

A=a+b

2h=0.6+2

2·2=2.6

Answer: 2.6

Step-by-step explanation:

A= h(b1+b2)

Need help with this question as well thank you ppl

Answers

Answer:

42  .. isn't that the answer to everything?   :P

Step-by-step explanation:

convert 23 m into mm

Answers

Answer: It is 23,000 Millimeters

Step-by-step explanation:

23 Meters =  23,000 Millimeters

Answer: maybe 2mm?

Step-by-step explanation:

Arline's in Aplus bar always the same distance apart and they never me

Answers

Answer:

Step-by-step explanation:

sorry cannot help you

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