David bought 3 DVDs for 4 books for $40 at a yard sale. Anna bought 1 DVD and 6 books for $18. How much did each DVD and book cost?

Answers

Answer 1

Answer:

dvd cost $12 each

book cost $1 each

Step-by-step explanation:

3d + 4b = 40

d + 6b = 18

substitution method:

d = 18-6b

3(18-6b) + 4b = 40

54 - 18b + 4b = 40

-14b = -14

b = $1

d + 6 = 18

d = $12


Related Questions

Lola spent $65.00 for 10 tickets to the
children’s puppet show. For numbers
13a – 13d, circle YES or NO to indicate
whether the price paid for the given
number of tickets is equivalent to the rate
Lola paid.
13a. $6.50 for 1 ticket YES NO
13b. $26.00 for 4 tickets YES NO
13c. $70.00 for 15 tickets YES NO
13d. $13.00 for 5 tickets YES NO

Answers

Answer:a.yes b.yes c.no d. Yes

Step-by-step explanation: that should be correct

Can someone please please help me answer this question asap thank you

Answers

Answer:

96

Step-by-step explanation:

288 ÷ 9 = 32

32 × 3 = 96

Answer:

96

Step-by-step explanation:

288/9 =32 so 32 on each bus which would be 96 for 3

I think this is what you where asking for hope it helps some

PLEASE HELP 20 POINTS!

Answers

Answer:

20/132

Step-by-step explanation:

There is a 5/12 chance of event A happening, Event B has a 4/11 chance happening so you multiply the chances together and get  20/132

PLEASEE HELPPP! IT DUE TONIGHT!!!

Answers

Answer:

Step-by-step explanation:

Answer:

11 +5x=y

y-11-5x=0

Step-by-step explanation:

Helppppp
needdddd it​

Answers

Answer:

angle don+angle gil=90°

don+ 74°=90°

don=90°-74°

don=16°

angle e + angle a=180°

128°+angle a=180°

angle a=180°-128°

angle a=52°

Answer:

1. 16°

2. 52°

Step-by-step explanation:

So!! Complementary angles add up to 90 degrees, and supplementary angles add up to 180 degrees. With this, it should be really easy. To find the measure of angle DON:

m∠DON + m∠OIL = 90°

m∠DON + 74°=90°

m∠DON=16°

For the measure of angle A:

m∠A+m∠E=180°

m∠A+128°=180°

m∠A=52°

Hope this helped!

Use perfect squares and the number line to estimate the value of StartRoot 75 EndRoot.. A number line from 0 to 10. StartRoot 75 EndRoot. Is between 5 and 6. 6 and 7. 7 and 8. 8 and 9.

Answers

Answer:

Between 8 and 9.

Step-by-step explanation:

8^2 = 64

9^2 = 81

So square root of 75 is between 8 and 9.

The number √75 is between 8 and 9.

What is square root of a number?

A square root of a number is a value that multiplied by itself gives the same number.

Given that;

The number is,

⇒ √75

Now,

Since, The value of √75 = 8.66

And, The number 8.66 is between 8 and 9.

Thus, The number √75 is between 8 and 9.

Learn more about the square root number visit:

https://brainly.com/question/11388449

#SPJ5

log (z ^ 3)/(x ^ 4 * y ^ 5) with steps please

Answers

Answer:

Step-by-step explanation:

COMPLETE THE STATEMENT. round to the nearest hundredth if necessary.

Answers

Answer:

1.13

Step-by-step explanation:

check attached file

Answer: 1.13

Step-by-step explanation:

Rounded to nearest hundredth it is 1.13

17gal/1h ?qt/min

convert gal to quarts and hours to mins to get same units

17 gallons = 68 quarts

1 hour = 60 mins

68/60=x/1

solve as normal..

PSYCHOLOGY!!! Which theory claims that individuals label emotions based on how they are interpreted?
A.
Cannon-bard theory
B.
James-Lange theory
C.
relative deprivation principle
D.
Schachter's two factor theory

Answers

Schachter's two-factor theory claims that individual labels emotions based on how they are interpreted.

What is Schachter's two-factor theory?

The Schacter two-factor theory states that emotion is the product of the interplay of two variables:

Physiological excitation and Cognition.

This theory suggests that physiological excitation is cognitively understood and interpreted within the setting of each encounter, resulting in the emotional experience.

The relationship between bodily arousal and how we cognitively perceive that arousal is the subject of the two-factor theory of emotion.

To put it another way, merely feeling arousal is insufficient; we must also recognize the arousal in order to interpret and experience the emotion.

Learn more about Schachter's two factor theory here:

https://brainly.com/question/7118820

Answer:

James-Lange theory

Step-by-step explanation:

Researchers were interested in looking at air quality in different regions of the United States. The following dot plot represents the number of days in a certain month that the air quality was unhealthy for eighteen cities in the Midwest.
10
Days
Which of the following box plots represents the same data displayed on the dot plot above?

Answers

Answer:

b

Step-by-step explanation:

you have to find the mean of the equation

what is the probability of having a standard deck of 52 cards, while having a 3 card hand and getting dealt a jack and a king.​

Answers

Answer:

The deck of 52 playing cards is broadly classified into 2 which are further divided into 2 divisions.

Red(26 cards) and Black(26 cards).

The red cards are further divided into diamonds♦️ (13 cards) and hearts♥️ (13 cards).

The black cards are further divided into clubs♣️(13 cards) and spades♠️(13 cards).

In each division of 13 cards classified above, there are/is-

3 face cards- King, Queen, Jack

One ace card

9 number cards(numbered from 2–10)

So, there are twelve face cards in a deck.

When three cards are picked, you may pick any three face cards out of the 12 face cards.

P(getting 3 face cards)=

No. of favourable face cards/ Total cards I.e,

12C3/52C3. By solving it we get 22/22100

=0.00995

Step-by-step explanation:

The school that Molly goes to is selling tickets to a spring musical. On the first day of ticket sales the school sold 10 adult tickets and 10 student tickets for a total of $260. The school took in $94 on the second day by selling 5 adult tickets and 2 student tickets. Write and solve a system of linear equations to find the price of an adult ticket and the price of a student ticket.

Answers

Answer:

Student ticket: $12, Adult ticket: $14

Equations: 260=10x+10y, 94=2x+5y

Step-by-step explanation:

Set adult tickets as y

Set student tickets as x

First day: Total made is 260 so set that equal to 10x + 10y

--> 260=10x+10y

Second day: Total made is 94 so set that equal to 2x + 5y

--> 94=2x+5y

I find it easier to have simplified terms so simplify (divide by 2) the first equation to get: 130=5x+5y

All you have to do now is solve for the two variables.

94=2x+5y - (130=5x+5y) --> x=12, y=14

(ii) n is a negative integer.
Write down all the values of n which satisfy 2n + 13 > 6

Answers

Answer:

[tex]0 >n>-\frac{7}{2}[/tex]

Step-by-step explanation:

[tex]2n+13-13>6-13[/tex]

[tex]2n>-7[/tex]

[tex]\frac{2n}{2}>\frac{-7}{2}[/tex]

[tex]n>-\frac{7}{2}[/tex]

n is negative, so it must be less than zero, [tex]0 >n>-\frac{7}{2}[/tex]

An airplane traveled at a speed of 600 miles per hour for 90 minutes. How far did the airplane travel? PLEASE HELP

A. 54,000 miles
B. 12,000 miles
C. 900 miles
D. 600 miles
E. 450 miles ​

Answers

Answer:

C 900 miles

Step-by-step explanation:

Since its traveling 600 miles per hour that would be equal to 300 miles per 30 minutes (half hour) and 600+300=900 making it C.

900 if it traveled 600 per hour and 90 mins is 1 hour and 30 mins then we already know that he traveled more than 600 and now we already know that 30 is half of an hour so we also do that to 600 and get 300 so 600+300 is 900

Someone help me please it’s for at 11:59pm

Answers

Answer:

11 sqrt 2

Step-by-step explanation:

it's a 45 45 90 triangle

Describe a sequence of transformations that verifies that these triangles are similar

Answers

We can’t see the question like we need to see it

help ASAP plzzzzzzzzzzzzzz

Answers

Answer:

e = 16

Step-by-step explanation:

-5e-4e = -144

-9e = -144

e = 16

Which of the following numbers are irrational?

Answers

Answer:

c.

hope it helps :)

Step-by-step explanation:

Answer:

B. Pi

Step-by-step explanation:

Pi is an irrational number---you can't write it down as a non-infinite decimal. This means you need an approximate value for Pi. The simplest approximation for Pi is just 3.

marking brainliestttt !!!
is b. the right answer?

Answers

Answer:

yes

Step-by-step explanation:

I think it is b too!!!

Answer:

Yes B is the right answer.

Which statement is true? A The greatest common factor of 10 and 14 is 5. B The greatest common factor of 10 and 15 is 5. C The greatest common factor of 13 and 21 is 3. D The greatest common factor of 14 and 21 is 3.​

Answers

A - the greatest common factors is 5

what's 28.782 to the nearest degree?

Answers

Answer:

I really dont know so u do it

Step-by-step explanation:

Answer:  It's 29 degrees.

Can someone plz help me with this one problem plz I really need this to be correct!!!

Answers

Answer:

The answers would be 5.42 and 5.1.

Step-by-step explanation:

The diagram shows 5.39, so those answers would be more than the diagram shows.

Please help with my ACT PRep

Answers

Answer:

it's D because in a graph y=3/4x-2 is not possible

HELP!!!!The area of a sector is 120pi with a radius of 20. What is the measure of that central angle?
A. 22
B. 108
C. 216
D. 11

Answers

Answer:

Step-by-step explanation:

22

If p=4 and q=6, evaluate the following expression:66/p+3q​

Answers

Answer:

3

Step-by-step explanation:

Since p = 4 and q = 6

Then:

66 / 4 + (3 x 6)

66 / 4 + 18

66 / 22

3

Answer: 3

Plug in p and q into the equation.

66/ (4) + 3(6)
66/ 4 + 18
66/ 22
3

find the ratio (fraction) for Tan H.. I need it fast

Answers

Given:

In right triangle [tex]GHI,m\angle I=90^\circ,GH=7.5,HI=7.2,GI=2.1[/tex].

To find:

The ratio (fraction) for Tan H.

Solution:

In a right triangle,

[tex]Tan\theta=\dfrac{Perpendicular}{Base}[/tex]

In [tex]\Delta GHI[/tex].

[tex]Tan H=\dfrac{GI}{HI}[/tex]

[tex]Tan H=\dfrac{2.1}{7.2}[/tex]

It can be written as

[tex]Tan H=\dfrac{21}{72}[/tex]

[tex]Tan H=\dfrac{7}{24}[/tex]

Therefore, the fraction for Tan H is [tex]\dfrac{2.1}{7.2}[/tex] or it can be written as [tex]\dfrac{7}{24}[/tex].

Please help with this its confusing somehow :(​

Answers

Answer: C.

Step-by-step explanation: divide -27 by 3

Find the value of this expression if x = -9.
X-7
x +7

Answers

Answer:

8

Step-by-step explanation:

numerator = -9-7 = -16

denominator = -9+7 = -2

[tex]\frac{num}{deno} = \frac{-16}{-2} = 8[/tex]

Given the points below, are the two lines parallel, perpendicular, or neither?
L1: (4, -6) (9, 4) L2: (-2, 1) (3, 0)

Answers

Answer:

none of them are perpendicular or parallel

Trevor built 8 birdcages to sell at the Connellsville Craft Show. He hopes to earn $112. Trevor will write an equation for p, the price in dollars he will charge for each birdcage.

A. Write an equation for the scenario.





B. What value of p makes the equation true? Explain how you found your answer.








C. Suppose Trevor decided he wants to earn $270 with the 8 birdcages. Write an
equation he could use to find p, the price in dollars he should charge for each birdcage. Tell how much Trevor should charge now, and explain why your answer is correct.

Answers

Answer:

a, 112/8

b, $14, found it by dividing

c, 270/8. Now he should charge $33.75. This is correct because 33.75*8=270

Step-by-step explanation:

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