Maria works at a bookstore. On Wednesday, she sold three times as many books as she did on Tuesday. On Thursday, she sold 8 fewer books than she did on Wednesday. During the three days, Maria sold 20 books. Create an equation that can be used to find m, the number of books Maria sold on Tuesday.

Answers

Answer 1

To write an equation to show how many books Maria sold on Tuesday, you will write an equation for each day.

Tuesday - m
Wednesday - 3m
Thursday - 3m - 8

Show all of these in an addition problem with a total of 20 and simplify.

m + 3m + (3m - 8) = 20

7m - 8 = 20; You can solve this equation to find the number of books Maria read.

Related Questions

Determine whether quantities vary directly or inversely and find the constant of variation. If 5 bushels of wheat weigh 136 kg, how much do 3.5 bushels of wheat weigh?

Answers

Well if 5 bushels = 136kg then 1 = 27.2 then 3.5 = 95.2 so it is directly and th vriation is 27.2

Let the bushels of wheat is b and weight of the wheat is w.

We can say that more the bushels of wheat more will be the weight of the wheat.

Hence, the quantities vary directly.

Therefore, we have

[tex]b=kw[/tex], where k is the constant of variation.

Now, we have been given that 5 bushels of wheat weigh 136 kg. Thus, we have

[tex]5=136k\\ \\ k=\frac{5}{136}[/tex]

Thus, the constant of variation is [tex]\frac{5}{136}[/tex]

Now, we have been given 3.5 bushels of wheat. Hence, we have

[tex]3.5=\frac{5}{136} w\\ \\ w=\frac{136\times 3.5}{5} \\ \\ w=95.2[/tex]

Therefore, 3.5 bushels of wheat weigh 95.2 kg

This is a "water tank" calculus problem that I've been working on and I would really appreciate it if someone could look at my work and tell me if I did it properly! Thank you.

Answers

Part A

Everything looks good but line 4. You need to put all of the "2h" in parenthesis so the teacher will know you are squaring all of 2h. As you have it right now, you are saying "only square the h, not the 2". Be careful as silly mistakes like this will often cost you points.

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

Part B

It looks like you have the right answer. Though you'll need to use parenthesis to ensure that all of "75t/(2pi)" is under the cube root. I'm assuming you made a typo or forgot to put the parenthesis.

dh/dt = (25)/(2pi*h^2)
2pi*h^2*dh = 25*dt
int[ 2pi*h^2*dh ] = int[ 25*dt ] ... applying integral to both sides
(2/3)pi*h^3 = 25t + C
2pi*h^3 = 3(25t + C)
h^3 = (3(25t + C))/(2pi)
h^3 = (75t + 3C)/(2pi)
h^3 = (75t + C)/(2pi)
h = [ (75t + C)/(2pi) ]^(1/3)

Plug in the initial conditions. If the volume is V = 0 then the height is h = 0 at time t = 0
0 = [ (75(0) + C)/(2pi) ]^(1/3)
0 = [ (0 + C)/(2pi) ]^(1/3)
0 = [ (C)/(2pi) ]^(1/3)
0^3 = (C)/(2pi)
0 = C/(2pi)
C/(2pi) = 0
C = 0*2pi
C = 0

Therefore the h(t) function is...
h(t) = [ (75t + C)/(2pi) ]^(1/3)
h(t) = [ (75t + 0)/(2pi) ]^(1/3)
h(t) = [ (75t)/(2pi) ]^(1/3)

Answer:
h(t) = [ (75t)/(2pi) ]^(1/3)

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

Part C

Your answer is correct.
Below is an alternative way to find the same answer

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

Plug in the given height; solve for t
h(t) = [ (75t)/(2pi) ]^(1/3)
8 = [ (75t)/(2pi) ]^(1/3)
8^3 = (75t)/(2pi)
512 = (75t)/(2pi)
(75t)/(2pi) = 512
75t = 512*2pi
75t = 1024pi
t = 1024pi/75
At this time value, the height of the water is 8 feet

Set up the radius r(t) function
r = 2*h
r = 2*h(t)
r = 2*[ (75t)/(2pi) ]^(1/3) .... using the answer from part B

Differentiate that r(t) function with respect to t
r = 2*[ (75t)/(2pi) ]^(1/3)
dr/dt = 2*(1/3)*[ (75t)/(2pi) ]^(1/3-1)*d/dt[(75t)/(2pi)]
dr/dt = (2/3)*[ (75t)/(2pi) ]^(-2/3)*(75/(2pi))
dr/dt = (2/3)*(75/(2pi))*[ (75t)/(2pi) ]^(-2/3)
dr/dt = (25/pi)*[ (75t)/(2pi) ]^(-2/3)

Plug in t = 1024pi/75 found earlier above
dr/dt = (25/pi)*[ (75t)/(2pi) ]^(-2/3)
dr/dt = (25/pi)*[ (75(1024pi/75))/(2pi) ]^(-2/3)
dr/dt = (25/pi)*[ (1024pi)/(2pi) ]^(-2/3)
dr/dt = (25/pi)*(1/64)
dr/dt = 25/(64pi)
getting the same answer as before

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

Thinking back as I finish up, your method is definitely shorter and more efficient. So I prefer your method, which is effectively this:
r = 2h, dr/dh = 2
dh/dt = (25)/(2pi*h^2) ... from part A
dr/dt = dr/dh*dh/dt ... chain rule
dr/dt = 2*((25)/(2pi*h^2))
dr/dt = ((25)/(pi*h^2))
dr/dt = ((25)/(pi*8^2)) ... plugging in h = 8
dr/dt = (25)/(64pi)
which is what you stated in your screenshot (though I added on the line dr/dt = dr/dh*dh/dt to show the chain rule in action)

You spend 60 on clothes and buy 3 dvd movies. your friend spends nothing on clothes and buys 8 dvd movies. you both spend the same amount of money. how much does each dvd movie cost?

Answers

Each dvd cost $7.50 how? Your friends buy 8 dvd's and in total is 60, you want to divide 60 from 8 and find that it's 7.50 and then multiply 8 to 7.50 and it should be 60. Hope this helps!!

Each DVD movie costs $12. This is calculated by setting up and solving an equation where the total spending on clothes and 3 DVDs equals the spending on 8 DVDs, as both parties spent the same amount.

To find out how much each DVD movie costs, we need to set up an equation based on the given information. You spent $60 on clothes and bought 3 DVD movies, while your friend spent $0 on clothes and bought 8 DVD movies. It is given that both of you spent the same amount of money. Let's denote the cost of each DVD movie as x.

The total amount you spent is the cost of the clothes plus the cost of the 3 DVD movies, which can be expressed as $60 + 3x. Your friend spent the cost of the 8 DVD movies, which is 8x. Since both amounts are equal, we have:

60 + 3x = 8x

Solving this equation for x:

Subtract 3x from both sides: 60 = 5xDivide both sides by 5: x = $12

Therefore, the price of each DVD movie is $12.

The length of a rectangle is increasing at a rate of 6 cm/s and the width is increasing at a rate of 4 cm/s. when the length is 16 cm and the width is 12 cm, how fast is the area of the rectangle increasing?

Answers

The area is 192 and the speed it’s increasing at is 24 cm^2/s

The line graphed below passes through the points (-2, 0) and (0, -3). Use the slope formula to calculate the slope between the given points. Verify the slope by counting the rise over the run on the graph.

Answers

The slope = (-3 - 0) / (0- -2) = -3 / 2

Answer:

The answer is -4/5

Step-by-step explanation:

It just is. The test said so.

what are a) the ratio of the perimeters and b) the ratio of the areas of the larger figure to the smaller figure? the figures are not drawn to scale. a. 13/3 and 169/9 b. 13/3 and 16/9 c. 16/3 and 169/9 d. 16/3 and 16/9

Answers

we know that

a) find the ratio of the perimeters

the ratio of the perimeters is equal to the scale factor
scale factor=26/6-----> 13/3
the answer Part a) is
the ratio of the perimeters is 13/3

b) find the ratio of the areas of the larger figure to the smaller figure
we know that
area larger figure=[scale factor]²*area smaller figure
scale factor²=area larger figure/area smaller figure

the ratio of the areas of the larger figure to the smaller figure is equal to scale factor squared
scale factor²=(13/3)²----> 169/9

the answer Part b) is
169/9

the complete answer is
13/3 and 169/9

can someone help me on trigonometry ?

Answers

Using the image I gave you, you don't need to solve for x.
So tan is opposite/adjacent
sin: opposite/hypotenuse
cos: adjacent/hypotenuse
Take theta and do: adjacent/hypotenuse which is cosine
cos theta = adjacent/hypotenuse
cos theta = 1.5/9
inverse cos = 1.5/9 and the answer is: 80.4 degrees

CAN SOMEONE HELP ME ON THIS

Answers

We apply the formula of distance between points:
d = root ((x2-x1) ^ 2 + (y2-y1) ^ 2)
We have then:
For WX:
WX = root ((- 3 - (- 10)) ^ 2 + (- 1-4) ^ 2)
WX = 8.602325267
For XY:
XY = root ((- 5 - (- 3)) ^ 2+ (11 - (- 1)) ^ 2)
XY = 12.16552506
For WY:
WY = root ((- 5 - (- 10)) ^ 2+ (11-4) ^ 2)
WY = 8.602325267
The triangle is isosceles because it has two equal sides.
Answer:
WX = 8.60
XY = 12.17
WY = 8.60
Isosceles

At noon joyce drove to the lake at 30 mph, but she made the long walk back home at 4 mph. how many hours did she walk if she was gone for 17 hours

Answers

By definition we have the following equation:
t = d / v
Where,
t: time
d: distance
v: speed
For this case we have:
d / 30 + d / 4 = 17
Rewriting we have:
2d + 15d = 17 (60)
17d = 17 (60)
d = 60 mi
Then, the walking time is
t = d / v
t = 60/4
t = 15 hours
Answer:
She walked
t = 15 hours

Answer:

i just did this on a quiz the answer was 15 hours

Step-by-step explanation:

Find the missing term of the geometric sequence. 45 ___ 1620

Answers

A geometric sequence has a common ratio. Let that ratio be r. Then you get the sequence:
[tex]45,45r,45r^{2}[/tex]
You know that the third term is 1620, so just solve for r:
[tex]45r^{2}=1620 \\ r^{2}=36 \\ r=\pm6[/tex]
So the common ratio is either 6 or -6. That means there are two possible missing terms:
[tex]45r \\ =45(\pm6) \\ =\pm270[/tex]

The missing term in the geometric sequence 45, ___, 1620 is 270.

A geometric sequence is a sequence of numbers where each term after the first is found by multiplying the previous one by a fixed, non-zero number called the common ratio.

Given the geometric sequence: 45, ___, 1620, we need to find the missing term.

Let's denote the missing term as a2 and the common ratio as r. The terms of the geometric sequence are determined by the formula:

an = a1 * rn-1

For our sequence:

The first term, a1, is 45.The third term, a3, is 1620.

We express the third term in terms of the first term and common ratio:

1620 = 45 * r2

Solving for r2:

r2 = 1620 / 45
r2 = 36
r = 6

Since the common ratio, r, is 6, we can find the missing second term, a2:

a2 = a1 * r
a2 = 45 * 6 = 270

Thus, the complete sequence is 45, 270, 1620.

Factor completely: 6b - 8ab + 15 - 20a

Answers

For this case we have the following expression:
6b - 8ab + 15 - 20a
We can rewrite the expression factoring.
We have then:
(4a-3) * (- 2b-5)
Checking we have:
-8ab-20a + 6b + 15
The resulting expression is the same.
Answer:
(4a-3) * (- 2b-5)

A math book sells for $106.50. (a) find the amount of sales tax, to the nearest cent, if the sales tax rate is 8.5%. (b) find the total purchase price

Answers

Answers:
________________________________________________________
a)  " $ 9.05 " .
________________________________________________________
b)  " $ 115 .55 " .
________________________________________________________
Explanation:
________________________________________________________

a)   "FInd the amount of sales tax, to the nearest cent,
if the sales tax rate is 8.5% ."

  → 8.5% of 106.50 = (8.5/100) * 106.50 = 0.085 * 106.50 ;

= 9.0525 ;

→ round to the nearest cent: $ 9.05 .
________________________________________________________
b)  Find the purchase price:

→ $ 106.50
+ 9.05
________________________________________________________
$ 1 1 5.55
________________________________________________________

Help Asap! 30 Points!
What is the volume of this sphere? r = 2.5 m

Answers

The volume would be,

65.45 m^3

Good Luck ^-^

The equation:
V = 4/3πr^3
input r:
V = 4/3π(2.5^3)
Multiply:
V = 4/3π(15.625)
V = 4/3(3.14)(15.625)
Multiply:
V = 4/3(49.0625)
Multiply by 4:
V = 196.25/3
V = 65.4166
Round up:
V = 65.42 m^3

Ethan correctly answers 80% of the total questions on his history test. He correctly answers 32 questions. What is the number of questions on Ethan's history test?

Answers

32 is 80% of x
x=40
Did most of the math in my head, I think 40 is the answer tho. xD gl!

hope this helps........

find the surface area of each figure. Round your answer to the nearest tenth, if necessary

Answers

Let A be the surface area, b the base, h the height, s the hypotenuse and l the length.

b=8
h=4.3
s=7
l=5

A= b²+bl+bs+bh

A= 8²+8*5+8*7+8*4.3

A= 194.4 m³

NEED HELP ASAP!
Subtract.
(4x^2+8x−2)−(2x^2−4x+3)
Answer in standard form

Answers

[tex](4x^2+8x-2)-(2x^2-4x+3)\\\\=4x^2+8x-2-2x^2+4x-3\\\\=(4x^2-2x^2)+(8x+4x)+(-2-3)\\\\=\boxed{2x^2+12x-5}[/tex]

Ms. Acosta received a job as a teacher with a starting salary of $34,000. According to her contact, she will receive a 1.5% increase in her salary every year. How much will Ms. Acosta earn in 7 years

Answers

The total amount that Ms. Acosta will earn in 7 years will be given by:
A=P(1+r/100)^n
where:
P=principles
r=rate
n=time
From the information given:
P=$34000, r=1.5%, n=7
thus
A=34000(1+1.5/100)67
A=$37,734.73

On the first test, the mean is 70, the standard deviation is 5, and your score is 80. on the second test, the mean is 70, the standard deviation is 15, and your score is 85. compared to other students, how well did you do on the two tests?

Answers

85+88+87+80+x all divided by 5= 82

340+x=410

410-340=70

Eight pounds of ground beef are divided into quarter-pound hamburger patties. How many hamburger patties are there in total?

Answers

8 times 4 equals 32, the total number of patties would be 32

Trains on the line reached an average speed of 125 miles per hour. Approximately, what is this speed in kilometers per hour?

Answers

125 miles per hour is equal to 201.168 kilometers per hour.

The measure of an angle is 8 times the measure of its complement. tina writes an equation and finds the correct measure of each angle. which shows the equation tina could have written and the angle measures she could have found?

Answers

One of the unknown angles (let's called it n) has a complement (meaning their sum adds up to 90 degrees) and the other angle is 8 times the unknown angle (8n)

With all this information, you should have the equation:

n + 8n = 90

To solve, combine like terms to get:

9n = 90

Divide by 9 on both sides to isolate the variable n.

n = 10

Now we plug back in to find our angle measurements. The first angle, n, is 10 degrees. The second angle, 8n, is 8 * 10 which is 80; the second angle is 80 degrees.

The measure of angles are 10 and 80 degree.

What is Algebra?

A branch of mathematics known as algebra deals with symbols and the mathematical operations performed on them.

In order to determine the values, these symbols are also subjected to various addition, subtraction, multiplication, and division arithmetic operations.

We have,

let the complementary angle = x

and, the another angle is = 8x

We know the complementary angle sum to 90 degree.

So, x + 8x = 90

9x = 90

x =10

Thus, the measure of angles are 10 and 80 degree.

Learn more about Algebra here:

https://brainly.com/question/24875240

#SPJ2

What is the surface area of the right cone Below
WILL MARK BRAINIEST !!

Answers

The formula to find the surface area of a cone is pi*r squared + pi*r*length. In this case, it would be pi*3 squared which is 9pi. You then add that to pi*3*15 which is 45pi. The answer is 54pi. Hope this helped!

Answer:

Option C

Step-by-step explanation:

Given in the picture is a right circular cone with base radius = 3 units and length = 15 units.

We have to find the surface area of the cone.

The total surface area of the cone is the sum of base area + lateral surface area

Base area = area of a circle = [tex]\pi r^2[/tex]

Lateral area of cone = [tex]\pi rl[/tex] where l = length of the cone.

Hence total surface area

= [tex]\pi r (r+l)\\=\pi (3)(3+15)\\=54\pi[/tex] square units

Option C is the answer.

Name three properties that a square and a rhombus share.

Answers

They are quadrilateral.
Their all sides are equal.
Diagonals bisect at 90° ( right angle )

Please someone help Me with this problem. I really need help.

Answers

The distance between (4, 7) and (2, 2) might be A, 10. Hope this helps, sorry if I'm wrong.

un joyero vende 13 anillos de oro y 18 de plata por 9405 euros. sabiendo que el anillo de oro cuesta el triple que el de plata ¿cual es el precio de cada anillo?

Answers

To solve this problem you must apply the proccedure shown below:

1. You have that:

- He sales 13 gold rings and 18 silver rings in 9405 euros.
- The cost of the silver ring is three times the cost of the gold ring.

2. Keeping the information above on mind, you have the following system of equations:

x: the gold ring.
y: the silver ring.

x+y=9405
x=3y

3. Then, you have:

(3y)+y=9405
y=9405/4
y=2351.23 euros

x=3y
x=3(2351.23)
x=7053.75 euros

The answer is:
- Gold ring=7053.75 euros
- Silver ring=2351.23 euros

Bart can paint one house in 3 hours. ann can paint one house in 5 hours. how long would it take bart & ann to paint one house if they worked together?

Answers

It will take them 4 hours

Will give brainliest! How many distinct triangles can be made? I think I have to first find the measure of length b and then compare measure a with b and h to find the answer. Please help me out on how to find measure length b

Answers

check the picture below.

this is a case of the ambiguous case with an SSA, AC and CB are the sides and the angle is at A.

the ambiguous case has two triangles, the case when B is acute, CB sticks out, and the case when B is obtuse, CB sticks inside, it just so happen that those two angles for B are "supplementary" angles.

if you check the sin⁻¹ of that, we'll get the acute version of B, that's because of the constraints on the range of the inverse sine function, and we get ∡B ≈ 36.86989765°.

and of course, the other angle for B will be 180 - 36.86989765.

A restaurant manager recorded the number of people in different age groups who attended her food festival: Histogram with title Food Festival Participants, horizontal axis labeled Age Group (yr) with bins 0 to 19, 20 to 39, 40 to 59, and 60 to 79 and vertical axis labeled Number of People with values from 0 to 60 at intervals of 10. The first bin goes to 20, the second goes to 40, the third goes to 60, and the last goes to 50. Which of the following frequency tables represents the data in the histogram accurately? Age Group (year) Number of People 0–19 20 20–39 60 40–59 40 60–79 50 Age Group (year) Number of People 0–19 20 20–39 60 40–59 50 60–79 40 Age Group (year) Number of People 0–19 20 20–39 40 40–59 60 60–79 50 Age Group (year) Number of People 0–19 60 20–39 20 40–59 40 60–79 50

Answers

The third choice is the correct answer because the information provided to you about the histogram shows the height of the first bar going to 20, the second bar going to 40, the third bar going to 60, and the fourth bar going to 50. The third frequency table organized this same information in the same way.

Answer:

There are 3 times as many participants in the 40-59 age group than the 0-19 age group.

Step-by-step explanation:

Because when we take 20 and times it by three we get 60 and the 40-59 age group is 60 so there you go. Hope This Helps:) Brain-list would be greatly appreciated.

What phrase can you use to represent m-4? M less then 4/ 4 less then m/ m plus 4 or 4 less m

Answers

Final answer:

The phrase 'm less 4' or '4 less than m' can be used to represent the expression 'm-4'. The other phrases mentioned do not accurately represent the mathematical expression 'm-4'.

Explanation:

The phrase that you can use to represent the expression m-4 is 'm less 4' or '4 less than m'. The phrase suggests that we are subtracting 4 from variable m. The phrase 'm plus 4' would be used to represent m+4 and does not apply here. So, in expressing the concept of subtraction in a phrase, we often say things like '4 less than m' which clearly conveys that 4 is being subtracted from m.

Learn more about Mathematical Phrasing here:

https://brainly.com/question/33441052

#SPJ11

Mark made a business trip of 250250 miles. he averaged 50mph50⁢mph for the first part of the trip and 60mph60⁢mph for the second part. if the trip took 4.54.5 hours, how long did he travel at each rate?

Answers

i think he traveled for 2.5 hrs at 56 mi/hr

Other Questions

How does Wiglaf show his own honor 99 POINTS AND BRAINLIEST FOR BEST ANSWER.Write a letter of complaint. Follow the rules for a formal letter, and use the full-block style. The complaint may be about anything you wish (such as malfunctioning equipment, poor building maintenance, or disruptive noises from a nearby business).You can base your letter on a true experience, or you can make up all the details you need.AND IT HAS TO BE PLAGARISM FREE!!!! Tara is a huge fan of comedian and actor will ferrell. she follows him on twitter and facebook, watches all his movies, and has even written him letters. tara has a/an ________ relationship with him. Read the passage from "The Pasture" By Robert Frost.I'm going out to fetch the little calfThat's standing by the mother. It is so young, it totters when she licks it with her tongue. I shan't be gone long.- You come too.Which type of voice do you see used in the passage?A. DramaticB.Academic C.FormalD.Conversational Which group of living things can move energy from consumers at the top of an energy pyramid back to producers at the bottom? *A. decomposersB. producersC. consumersD. Nothing can move energy back to the bottom of an energy pyramid. Which sentence uses the past progressive tense of read?A.We were reading our novels on the airplane.B.We read our novels on the airplane.C.We will read our novels on the airplane.D.We are reading our novels on the airplane. Line m has a slope of -1 over 5. What is the slope of a line that is perpendicular to line m? what is the radius of a circle with a circumference 31 m? Which difficult position might historians find themselves in? Tony is making small bags of bird seed from a larger bag of bird seed that wieghs 11.6 pounds if he puts the same amount in each of 6 bags how much will each bag wiegh? can someone please help me use a word for y and o? Which measurement would Rachel need to know when ordering wallpaper for the kitchen? A.the total perimeter of wall space to be covered B.the total area of wall space to be covered C.the thickness of the wallpaper D.the perimeter of the wallpaper read the information in the brainstorming table.Which piece of information best completes the table?Finally, I looked on the Internet for a banana bread recipe. Then I asked my dad if he could drive me to the grocery store.Finally, I baked the banana bread according to the directions.My teacher asked if I would make banana bread for the bake sale. The term "unification" refers to the merging of two states into one, but not to the creation of regional political or economic blocs. True or False?Its false but this is for people who need this question answered Which New Deal agencies still exist today? A.TVA and FDIC B.AAA and WPA C.CCC and WPA D.PWA and CCC What is the volume of the cylinder below? Radius of 8 height of 3 What is the percent of MgSO4 in magnesium sulfate heptahydrate? 48.83 % 51.17 % 95.43 % 86.98 % In a factory, a parabolic mirror to be used in a searchlight was placed on the floor. It measured 40 cm tall and 90 cm wide. Find an equation of the parabola with its vertex at the origin. The graph represents f(x), and g(x) = 7x 42.Which statement about these functions is true?A) The y-intercept of g(x) is less than the y-intercept of f(x).B) The y-intercept of g(x) is greater than the y-intercept of f(x).C) The x-intercept of g(x) is less than the x-intercept of f(x).D) The x-intercept of g(x) is greater than the x-intercept of f(x). What is a ribozyme?a. an enzyme that uses rna as a substrateb. an rna with enzymatic activityc. an enzyme that catalyzes the association between the large and small ribosomal subunitsd. an enzyme that synthesizes rna as part of the transcription processe. an enzyme that synthesizes rna primers during dna replication?