Mathematics Middle School

Mark bought a notebook for $1.45 and some pencils for $0.42 each. If the total cost was $6.91, how many pencils did he buy?

A.12
B.13
C.14
D.15

Answers

Answer 1
B - 13

Okay, we know that Mark brought 1 notebook and the totally is 6.91 while one pencil costs $0.42.

x= number of pencils he brought.
we know the price of 1 notebook + the cost of pencils times the numbers of pencils he brought = total cost.

So the equation will be:

1.45 + 0.42x = 6.91  subtract 1.45 on both sides.
0.42x = 5.46   Then we solve for x by dividing both sides by 0.42
x= 13

So the number of pencils he brought is 13.

Answer 2
1. 6.91 - 1.45 = 5.46
You subtract the notebook from the total cost

2. 5.46 / 0.42 = 13
You divide the cost of a pencil from the left over amount of money to see how many pencils Mark bought

3. Mark bought 13 pencils

Related Questions

How do i solve? 2/3h = -9

Answers

3h × 2 / 3h = -9 × 3h

therefore

2 = -27h

h = -27/ 2
i think it is right how i did it but i got -3 
yeah

Hank cut a cake into 12 equal pieces. He ate 2/12 pieces. He has 10/12 of the cake left to serve on plates. What part of the cake did he put on each plate.

Answers

Hank put two pieces of the cake on his plate and there are ten pieces of the cake left.
Hank put two pieces of cake on his plate

Please help it's due tommorow!! I need answers for questions 29-40

Answers

The Anwser to 29-40 is -11

I AM GIVING BRAINLIEST TO THE BEST ANSWER AND THE CORRECT ONE!!!!!
A jar holds 3/4 gallon of juice when it is 7/8 full. Which statement best describes the quotient of 3/4 divided by 7/8 ?
A The maximum amount of juice the jar can hold is 7/6 gallons.
B The maximum amount of juice the jar can hold is 6/7 gallon.
C The amount of juice that can be still poured in the jar is 7/6 gallons.
D The amount of juice that can be still poured in the jar is 6/7 gallon.

Answers

the correct answer is ''b'' because 3/4 is 6/8 and 7/8 is 7/8  so also is 6/7 i hope it helped u
B, I multiply 3/4 and 8/7. Cross multiply and got 6/7 .

nadia has 4 sheets of stickers there are 8 stickers on each sheet .she wrote this number sentence to represent the totel number of stickers

Answers

Well if your asking 8-4 it's 4 and if your asking 8+4 it's 12

Answer:32

Step-by-step explanation:

This question requires multiplying.

Think of 4 sheets as 4 groups. If there are 8 stickers in the first group, we still have 8, then we will add 8 to the second group. We will have 16. Next we will add 8 to third the third group, 24, and third to the fourth group which will give us 32. 8,16,24,32.

Our equation will be 8×4=32

how many tenths are there in 4/5

Answers

8 tenths

4/5 = 8/10

You multiple nominator and denominator by 2
it will be 8/10 because of you multiply both numbers with two it will equal that

Trampoline Park has an admission fee, plus an hourly fee of $4.50. Determine the admission fee that the trampoline park charges. What is the initial value?

Answers

The initial value of a function is when x = 0.  The initial value of the Trampoline Park is $5.00

Given that:

[tex](x_1,y_1) \to (3,18.5)[/tex]

[tex]m = 4.50[/tex] ---- the rates

The equation is calculated using:

[tex]y = m(x - x_1) + y_1[/tex]

So, we have:

[tex]y = 4.50(x - 3) + 18.5[/tex]

Open bracket

[tex]y = 4.50x - 13.5 + 18.5[/tex]

[tex]y = 4.50x + 5.00[/tex]

The initial value is when [tex]x=0[/tex]

So, we have:

[tex]y = 4.50 \times 0 + 5.00[/tex]

[tex]y = 5.00[/tex]

Hence, the initial value is $5.00

Read about linear functions at:

https://brainly.com/question/11897796

A CD player is on sale for $90 at an electronics store. If the original price was $125, what was the percent of discount

Answers

This is the working of how it is 28% discount

Find the amount of discount : $125 - $90 = $35
Divide by the original price : $35/125 = 0.28
Change in to percentage : 0.28 x 100 = 28%

Therefore the percentage discount is 28% off

:)

Solve for P.

4p = 1/2

Answers

Hi there!

This is very simple if you think about it.

To solve here is what you need to do:
4p = 1/2

Divide both sides by 4 -
4p/4 = 1/2/4

p = 1/8
This of course cannot be simplified any lower than what it is because the numerator is a 1. When it is a 1 it cannot be smaller. (Note that a fraction cannot have a decimal number as its numerator OR denominator.)

Hope this helps!

Answer:

1/8

Step-by-step explanation:

You need to find P not 4p so you divide 4p by 4 to get P and by doing this you have to divide the other side too. so now you got 4p/4 = 1/2/4 which = p=1/8

Admission to a car show costs $5 for each ticket. After selling only 20 tickets, they decided to lower the price to $3 each. If they raise $217 ,how many tickets did they sell in all?

Answers

First you would multiple 5 × 20 which equals $100 then you would subtract $217 by $100 and you would get 39 tickets and then you would add your twenties tickets and your 39 tickets together to get your answer which is 59 tickets.
First you do 5x20=100 then you need to find out what is the closes thing to 217 so you do 3x40=120 then you subtract 3 from 120 to get 117. Then you take that 20 pictures and the 39 from the 40 then subtracting 1 then do 20+39=59. Which means they sold 59 tickets

a go carts too speed is 607200 feet per hour. what is the speed in mph?

Answers

The answer is 115 miles per hour
The speed in mph is 115 mph because there are 5280 feet in a mile, so you just divide 607200 by 5280, and you would get 115 mph.

Eric downloads a 10% off any one item coupon and goes shopping at Gadgets Galore, where he buys a digital camera for $93 and an extra battery for $13.99.

Answers

I assume the question is asking how much he paid...?

If so, he has 10% off from 100% of the original price.
100% - 10% means he will pay 90% of the original price.
To find the original price we must add the price of the two items together to get the total price.

$93 + $13.99 = (I will let you do the math.)

Then we must multiply the total price by the percentage he paid (90%).
To do this we must convert 90% into a decimal.
Percent(%) is just a way of saying "Out of 100".
So 90/100 = .90

For the final answer multiply:  .90 * total price = answer.

5 1/3-w= 4
These problems confuse me so much.

Answers

First, you would subtract 5 1/3 on each side, leaving you with -w = -1/3. Since you can't have a negative variable, you would then multiply each side by -1, giving you w = 1/3. Hope this helped and make sure to make this the brainliest answer :)

Write addition fact that helps you to solve 12-4

Answers

Possibly 8+4 because 8+4 equals 12

Subtraction Is 12-4 equal 6

jamal works in a city and sometimes takes a taxi to work. The taxicabs charge $1.50 for the first 1/5 mile and $0.25 for each additional 1/5 mile. Jamal has only $3.75 in his pocket. What is the maximum distance he can travel by taxi if he does not tip the driver?

Can someone help with this question please?

Answers

9/5 of a mile, or 1 and 4/5 miles
It will get him 1.8miles.
He pays 1.50 for the first mile so take 1.50 from the 3.75 and you will get 2.25$.
So take the 2.25 and divide it by how much he will have to pay for each mile .So 2.25/0.25 and you get 0.09 .But you can also just take 1.50 away from 3.75 and get 2.25 the count how many quarters is in 2.25. but you will have to multiply 9 by 1/5 which is 1.8 miles .Its that or 9

Find the solution to the system of equations graphed here

Answers

To find the solution of the system of equations, basically find the point whew the 2 lines intersect at, in this case it would be (1,3).

Answer:

The answer is C

Step-by-step explanation:

How many numbers from 1 to 100 can be divided by 2 with none leftover.

Answers

50 because half of the numbers in 100 are even and all even numbers are divisible by two

How do you write this equation "at a concert,you purchase 3 T-shirts and a concert program for a total cost of $90.The program cost $15 and the T-shirts all cost the same.Write and solve an equation to find the cost of one T-shirt."

Answers

Input 15 as the initial value and (3, 90) as x and y to get the equation 90=m(3)+15. Isolate m to get m=25. Each shirt costs $25 and the equation that represents the scenario is y=25x+15.

I NEED HELP WITH 2 QUESTIONS I WILL MAKE SOME THAT GETS THEM CORRECT THE BRAINIEST, THANKS, AND RATE
Peter earned $180 working at a store during the summer months. He bought 4 books worth $12 each from his earnings at the store. How much money was left after he bought the books?
A$33
B$42
C$132
D$228
Tom bought 5 t-shirts from a store. After he bought the t-shirts, his account balance showed a change of –$65.25. What would have been the change to Tom's account balance had he only bought 1 t-shirt from the store?
A$13.05
B–$13.05
C$13.50
D–$13.50

Answers

1. peter earned 180 dollars
4 books of 12 dollar each will be 4 x 12= 48 dollars
180 - 48 = 132 dollars is left

2. tom bought 5 t shirts. he didnt pay any money so we assume that he paid 0 dollars.
the price of one shirt will be -65.25 dollars / 5
which will give -13.05 dollars

Answer:

1. The correct answer choice is C $132.

2. The correct answer choice is B -$13.05

Step-by-step explanation:

1. 12 x 4 = 48.

180 - 48 = 132

2. -65.25/5 = -13.05

Yes, I know this is already answer.

Also, I took the test :)

Have a good day!

Find the quotient of 1.2 divided by 251.2 show your work

Answers

do 1.2 then the division box and inside the box put 251.2 and the answer is 209.333333333 with an infinite 3

After divide, the quotient of 1.2 divided by 251.2 is 0.004777.

What is Division method?

Division method is used to distributing a group of things into equal parts. Division is just opposite of multiplications. For example, dividing 20 by 2 means splitting 20 into 2 equal groups of 10.

Given that;

⇒ 1.2 divided by 251.2

Solve this as;

⇒ 1.2 ÷ 251.2

⇒ 0.004777

Learn more about the divide visit:

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estimate 4 divided by 1165

Answers

your answer would exactly be 2.9125e2. Estimated, 2.91
Hope this helps!!
Your answer is 291. Hope this helps

Triangle XYZ is similar to triangle RST what is the perimeter of triangle RST

Answers

You need values of some sort to answer this question; the perimeter of triangle RST will correspond to the perimeter of triangle XYZ. For instance, if XYZ has sides 3/4/5, then RST might have sides 1.5/2/2.5 or 6/8/10.

The perimeter of triangle RST is B) 56.25 units. Therefore, the correct answer is B) 56.25 units.

The perimeter of a triangle is the sum of the lengths of its sides.

Since triangle XYZ is similar to triangle RST, the ratio of the corresponding sides of the two triangles is the same.

Therefore, we can set up the following proportion:

XY / XZ = RS / RT

Substituting the known values, we get:

15 / 4 = RS / RT

Multiplying both sides by RT, we get:

15 = RS * RT

We also know that the sum of the angles in a triangle is 180 degrees. Therefore, we can set up the following equation:

90 + ∠RST + ∠SRT = 180

Substituting the fact that triangle XYZ is similar to triangle RST, we get:

90 + ∠XYZ + ∠XZY = 180

Substituting the known values, we get:

90 + 30 + 60 = 180

Therefore, ∠RST = 60 degrees.

Now that we know the lengths of two sides of triangle RST and the measure of one angle, we can use the law of cosines to find the length of the third side:

RT^2 = RS^2 + ST^2 - 2 * RS * ST * cos(∠RST)

Substituting the known values, we get:

RT^2 = 15^2 + ST^2 - 2 * 15 * ST * cos(60 degrees)

Simplifying, we get:

RT^2 = 225 + ST^2 - 15ST

We also know that the perimeter of triangle RST is equal to the sum of the lengths of its sides:

Perimeter = RS + RT + ST

Substituting the fact that triangle XYZ is similar to triangle RST, we get:

Perimeter = 15 + RT + ST

Now that we know the length of RT and the fact that the perimeter of triangle RST is equal to the sum of the lengths of its sides, we can substitute these values into the equation for the perimeter to find the length of the third side, ST:

Perimeter = 15 + RT + ST

ST = Perimeter - 15 - RT

ST = 56.25 - 15 - 37.5

ST = 3.75

Therefore, the perimeter of triangle RST is:

Perimeter = RS + RT + ST

Perimeter = 15 + 37.5 + 3.75

Perimeter = 56.25

Therefore, the correct answer is B) 56.25 units.

for such more question on perimeter

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Question

Triangle XYZ is similar to triangle RST.

Side lengths:

XY = 15 units

XZ = 4 units

YZ = 6 units

Angle measures:

∠X = 90°

What is the perimeter of triangle RST?

A) 45 units

B) 56.25 units

C) 37.5 units

D) 15 units

what is the meaning of term

Answers

the meaning of a term is what is a qout

of what some one is say
a term is a word or phrase used to describe a concept

x - y = 3
x + 2y = -6


Giving out brainliest
SHOW ALL OF YOUR WORK☺

Answers

[tex]x-y=3[/tex]
[tex]x+2y=-6[/tex]

Subtract both equations to isolate and solve for y.

[tex](x-x)+(-y-2y)=3-(-6)[/tex]
[tex]0+-3y=9[/tex]
[tex]y=-3[/tex]

Now, solve for x in either equation by plugging in the y value.
I will choose the simpler first equation: [tex]x-y=3[/tex]

[tex]x+3=3[/tex]
[tex]x=0 ; y=-3[/tex]
x - y = 3 >> x = 3 + y
substituting this x in the second equation gives us
3 + y + 2y = -6 >> 3y = -9 >> y = -3
substituting this value of y in x = 3 + y gives us:
x = 3 + (-3) = 3 - 3 = 0

so the solution is: y = -3 and x = 0

What is the approximate percent decrease when a fish count goes down from 850 to 500?

Answers

Answer:

About 40%

Step-by-step explanation:

It would normally be 41.--% But rounded is the approximate percent so it would be 40%. I hope this helps you! :)

Answer: 41%

Step-by-step explanation:

The change in fish count = [tex]850-500=350[/tex]

The percent decrease when a fish count goes down from 850 to 500 is given by :-

[tex]\text{Percent decrease}=\frac{\text{Change in fish count}}{\text{Previous fish count}}\times100\\\\\Rightarrow\text{Percent decrease}=\frac{350}{850}\times100\\\\\Rightarrow\text{Percent decrease}=41.176470588\%\approx41\%[/tex]

Hence, the approximate percent decrease when a fish count goes down from 850 to 500= 41%

One serving of milk has 120 calories. If one serving is equal to one cup how many calories are in one fluid ounce. 1 Cup = 1 fluid ounce

A. 10
B. 12
C. 16
D. 15

Answers

Well one cup dose not equal one fluid ounce but there are 8 fluid ounces in one cup so you divide 120 by eight and you get 15 calories for one fluid ounce. So your answer is D.

38 1/4 divided by 4 1/2

Answers

use a calculator its not that hard
make the two mixed fractions an improper fraction
38 1/4 = 153/4 and 4 1/2= 9/2
153/4 divided by 9/2
153/4 x 2/9
= 17/2 or 8 1/2

If r = 5 units and x = 7 units, then what is the volume of the cylinder shown above?
A.
175 cubic units
B.
35 cubic units
C.
120 cubic units
D.
700 cubic units

Answers

I hope this helps you

Answer:

175 cubic units

Have a good day.

your friend has owned a dog for 9 years. This is one year less than twice as long as he has owned a cat. How long has your friend owned a cat? write and solve an eqaution

Answers

your friend has owned a cat for 17 years, because 9 times 2 subtracted by 1 equals 17.
(9x2)-1=x



i belive she has owned the cat for 16 years, 9-1x2=16

what theorems/ info about proportional parts in triangle and parallel lines should I use to find the missing length of a triangle? how should I set up an equation? Please explain with details, I will be so grateful.

Answers

Hello there!

So first, yes, you find the missing length (piece plus piece equals whole part) and proportional, you just visualize ( like let's say there are two similar shapes  that are smilier : ABCD~ FGHJ  and let's say AB is 3   FG is 9 , so i would say 3/9 . And for CD is ,..let's say 8 and HJ is 16, so 8/16. So basically:


3  =  9
--      --
8       16         <--- that's how you set up proportional





i  hope you understand , and if not, feel free to message me! 

Have a beautiful day 
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