Answer: 19.50
Step-by-step explanation:
Write a system of equations to represent the problem. Let x represent the cost of a binder, and let y represent the cost of a notebook.
Grace buys 4 binders and 7 notebooks for $26.50 total, so the equation 4x+7y=26.50 represents how much Grace spends.
Grace's friend buys 3 binders and 6 notebooks for $21.00 total, so the equation 3x+6y=21 represents how much her friend spends.
You can use this system of equations to find how much money Grace and her friend spend on notebooks:
4x+7y=26.50
3x+6y=21
Next, find how much Grace and her friend spent on notebooks. Start by finding the cost of one notebook. Use elimination to solve for y. .
3(4x+7y)=3(26.50)
–
12x+21y = 79.50
–
4(3x+6y)=
–
4(21)
–
12x–24y =
–
84
–
3y =
–
4.50
y = 1.50
Each notebook costs $1.50. Grace and her friend buy a total of 13 notebooks, so multiply to find how much money they spend on notebooks.
13$1.50=$19.50
Please answer these questions! I’ll give you brainliest an more! ASAP due Monday!
Answer:
Supplies used:
a. 12 feet of wood used
b. 3.5 bundles used, .5 left
Areas:
a. .75 ft
b. 1.61 ft
c. 2.625 ft
d. 3.33 ft (3 1/3 ft)
Paint:
8 ounces
Step-by-step explanation:
For the supplies used, we can multiply 16 by 3/4 to get 48/4, which simplifies to 12
Then for the shingles we can multiply 4 by 7/8 to get 28/8, which simplifies to 3.5
To get the areas, we just have to multiply the length and width together
6/7 * 7/8 will give us 3/4 or .75
1 1/8 * 1 3/7 will give us 1.61 feet
1 1/8 * 2 1/3 will give us 2.625 feet
1 3/7 * 2 1/3 will give us 3.33 or 3 1/3 ft
To find out how much paint we need, we just have to multiply 2/3 by 12
So we will get 24/3, which simplifies to 8
So we need 8 ounces of paint
If I missed anything please let me know,
Best of luck
A scientist used 786 milliliters of a liquid for an experiment. How many liters of the liquid did the scientist use for this experiment?
A- 786,000 L
B- 7.86 L
C- 0.786 L
D- 0.0786 L
Answer:
0.786L
Step-by-step explanation:
HELPPPPP PLS!!!!!!!!!
Answer:
its 27 but its not there so is
1. no
2.no
3.no
4.no
Step-by-step explanation:
plase give me brailiest
help!! its a part A and part b question
(don't mind my answer for A I pressed it by accident)
Answer:
2cm is 5km
Step-by-step explanation:
16cm is 40km
Answer: 4e+6 centimeters
Step-by-step explanation:
Multiply the length value by 100000 and you'll get your answer.
40x100000= 4e+6 (Multiplied by length value).
the two images below are my question...
Answer:
r = 9.7
Step-by-step explanation:
r-4=5.7
+4 on both sides
r=9.7
:]
What is the constant of proportionality for the relationship between the number of laps and the number of hours?
Answer:
24 laps per hour
Step-by-step explanation:
1/2 hr. is 30 mins she ran 12 laps in 30 mins
60 divided by 30 equals 2
12 time 2 equals 24
\( \bf \implies{24 \: laps/hour}\)
Step-by-step explanation:\( \bf \longrightarrow12 \div \frac{1}{2} \\ \\ \bf \longrightarrow12 \times 2 \\ \\ \bf \longrightarrow24 \: laps/hour\)
KA AGAIN ( 2 pdfs)
correct answers only
Answer:
B
Step-by-step explanation:
To find the constant of proportionality between y and x, divide \(\frac{y}{x}\) for all given values of the chart. If you get the same number, then that is the constant. If they are all different numbers, then one does not exist for that function.
Using the method above, you should get:
Chart A = 2/5
Chart B = 1/5 (Correct Answer!)
Chart C = N/A
Hope this helps!
Answer:
the answer is B
Step-by-step explanation:
Hope this helps
A prism is completely filled with 540 cubes that have edge length of 1/3 cm.
What is the volume of the prism?
Answer: 20
Step-by-step explanation:Each little cube is 1/27 cm cubed. If you multiply by 540, you get 540/27. This equals 20.
What is the measurement of the longest line segment in a right rectangular prism that is 11.2 centimeters long, 6.6 centimeters wide, and 6 centimeters tall?
Answer:
Step-by-step explanation:
3.1313109
Answer: the answer should equal 3.131
Step-by-step explanation: as this is the measurement of the longest line in right rectangular prism.
Please got brainliest
help me plz! thx sooo much! =D
Answer:
X Y
1 25
3 17
4 13
6 5
Step-by-step explanation:
All we need to do is substitute the x values into the equation and we will find the y values!
In each equation, select an operation to make the equation true by making the operation happen where the question mark appears.
PLEASE HELP ME
please help me i will give brainliest to first person to anwser.
Answer:
The first option, V ≈ 1607.7 in²
Step-by-step explanation:
Find the volume of the given cylinder.
\(\begin{center}\framebox{\parbox{4cm}{\textbf{Volume of a Cylinder:}\\[2ex]The volume of a cylinder with radius $r$ and height $h$ is given by the formula:\\[2ex]\center{$V = \pi r^2 h$} \\ \\}}\end{center}\)
Given:
r = 8 in
h = 8 in
π = 3.14
Find:
V = ?? in³
\(\hrulefill\)
Now solving,
Substitute the given values into the formula:
=> V = (3.14)(8)²(8)
Using a calculator to simplify:
=> V = 1607.68 in²
Rounded to the nearest tenth:
∴ V ≈ 1607.7 in²
Thus, the first option is correct.
What number should go in the box to make the equation true? Explain how you got to your answer.
- (3/4) = ?/4
A. -3
B. 3
C. -4
D. 4
Please help me! im on an assignment an cant figure it out
Step-by-step explanation:
The difference beteen 9.2 ounces and 8.1 ounces is 1.1 ounces
and the difference in price is .49
so 1.1 ounces cost .49
$ .49 / 1.1 oz = $ .445 per ounce
Then Reid's bowl should cost 7.8 oz * $ .445 / oz = $3.47
For each ride, a taxi service charges an initial fee plus an additional fee based on the number of kilometers of the trip. The graph shows the cost for taxi rides. Select a true statement. The rise is 4 while the run is 2. The selection of answers are:
A: The slope is 2.1. This means that each kilometer costs $2.10.
B: The slope is 5. This means that each kilometer costs $5.
C: The y-intercept is 2.1. This means that the initial fee is $2.10.
D: The y-intercept is 5. This means that the ride lasts 5. kilometers.
Which one is right and why?
THIS MIGHT NOT BE WHAT YOU ARE LOOKING FOR AND MIGHT NOT BE CORRECT! READ FIRST!
The answer is A. The slope of the line is rise/run = 4/2 = 2.1. This means that each kilometer costs $2.10. The y-intercept is 2.1, which means that the initial fee is $2.10. So the correct statement is: The slope is 2.1. This means that each kilometer costs $2.10.
The other statements are incorrect. The slope is not 5, so each kilometer does not cost $5. The y-intercept is not 5, so the ride does not last 5 kilometers. The y-intercept is the value of the function when the input is 0, which in this case is the initial fee of $2.10.
Which transformation from the graph of a function f(x) describes the graph of 5f(x)?
Part A: vertical or horizontal?
Part B: stretch or shift?
Part C: right, by a factor of, up, left, or down?
Answer:
Step-by-step explanation: shifted up 5
Answer:
Step-by-step explanation:
shrinks vertically
I WILL MAYBE GIVE BRAINLIEST IF CORRECT PLS ANSWER
\(\sqrt{49 } =\)
a. 9
b. 14
c. 8
d. 7
Answer:
The answer is d
Step-by-step explanation:
cause 7 x 7 is 49
What is -4/7 divided by 5?
Answer:
-4/35
Step-by-step explanation:
Marcus needs 12 cups of edible flowers to make the breakfast mixture to feed the zoo's emperor tamarin monkey troop for the week. The number of cups of edible flowers the zoo has in storage is represented by the expression 1.875c−(c+0.5d). If c=25 and d=20, does Marcus have enough edible flowers to make the breakfast mixture for the emperor tamarin monkeys?
No, because 1.875(25)-((25)+0.5(20))=11.875, which is less than 12.
No, because 1.875(25)−((25)+0.5(25))=9.375, which is less than 12.
No, because 1.875(20)−((25)+0.5(20))=2.5, which is less than 12.
No, because 1.875(20)−((20)+0.5(25))=5, which is less than 12.
Answer:
No, because 1.875(25)-((25)+0.5(20))=11.875, which is less than 12.
Step-by-step explanation:
c = 25 d = 20
1.875(25) - (25+0.5*20) =
46.875 - 35 =
11.875
the ratio of the number of oranges to apples to bananas is 8:5:2. if there are 120 fruits in total, how many bananas are there
Answer:
Step-by-step explanation:
To find the number of bananas, we need to determine the proportion of bananas in the total number of fruits based on the given ratio.
Let's assume that the ratio of oranges, apples, and bananas can be represented by 8x, 5x, and 2x, respectively, where x is a common multiplier.
The sum of the parts in the ratio is 8x + 5x + 2x = 15x.
We know that the total number of fruits is 120. Therefore, we can set up the following equation:
15x = 120
To solve for x, we divide both sides of the equation by 15:
x = 120 / 15
x = 8
Now that we know the value of x, we can find the number of bananas by multiplying it by the corresponding part of the ratio:
Number of bananas = 2x = 2 * 8 = 16
So, there are 16 bananas in total.
We can add all the parts to the ratio and get 15. Out of 15 parts, 2 are bananas. Now we can calculate how many fruits are in one part. One fifteenth of 120 is 8, so there are 8 fruits in one part. 2 parts are bananas, so multiplying 8 with 2 gives us our answer, 16.
A cardboard storage carton has a length of 3 feet, a width of 2 feet, and a volume of 12 ft³.whatis the minimum amount of cardboard needed to make the box? [hint: you're given volume, so find the missing height. then use your 3 dimensions to find the total surface area.]
HELP WITH IN 5 MINS WHOEVER GETS IT RIGHT STEP BY STEP WILL BE BRAINLEST
Theo makes a decorative bookmark of size 2"*6" for his teacher. Find the area of the bookmark.
Answer:
12
Step-by-step explanation:
book mark is in the form of rectangle area of rectangle = length into breadth = 6 into 2 = 12
Answer:
12 inches
Step-by-step explanation:
2 x 6 = 12
12 inches
Have an amazing day!
PLEASE MARK BRAINLIEST!
Please help me. Mark me the branliest.
Topic: Percentage
Q1) 80% of a dog's mass is equal to 24% of the mass of a lion. If the mass of the lion is 105 kg more than the mass of the dog, find the total mass of the dog and the lion.
Isabel is mixing paint. She mixes 2 (1/3) pints of blue paint and 4 (1/4) pints of yellow paint.
Which of the following has a ratio of blue paint to yellow paint that is proportional to the amounts used in Isabel's paint mixture?
Answer: None of these are correct
Step-by-step explanation:
What is the value of x and y please explain will give brainliest if you give me a good explanation!!
100 POINTS+BRAINLIEST -8TH GRADE MATH- 4 LITTLE MULTIPLE CHOICE QUESTIONS
**3 of them are simplifying algebraic expressions- please explain how and some rules to remember when doing so.
**the last 1 is determining whether 2 lines are parallel, perpendicular, or neither. Please define each term and show how to find out.
THANKS SO MUCH!!!
Answer:
3x+y=6 is parallel
y=-3x-2
4x 2
----------- - ----------- 2/x+5
x^2-25 x-5
5 3
------ + ------- 8x+19/x^2+5x+6
x+3 x+2
Step-by-step explanation:
Molly wants to buy a dress that costs $20. She has a coupon for 40% off, and there is a 10% sales tax. How much will she pay altogether?
1. What is the 40% of $20? Show your work.
2. After using the coupon, what is the sale price of the dress?
3. How much is the 10% tax on the sale price? Explain how you found your answer.
4. After tax is added to the sale price, how much does Molly pay for the dress?
How do i do this please actually give a good answer i will mark brainliest, look at the picture.
Answer:
Domain = -4,-3,-2,-1, 0, 1, 2, 3
Range = -3, -1, 0.2, 0.3, 1, 2, 5,
Step-by-step explanation:
x = domain
f(x) = y values = range values
We simply do not need repeats ie) -1, and -1 both shown on the same y axis table or side of graph) and can show numerical order if wanted.
How many 2 digit prime numbers can you make make with 2,3,7,9 without repeating a digit?
So you can make 6 prime numbers.
Answer:
6
Hope you could get an idea from here.
Doubt clarification - use comment section.
Answer:
Hey mate!
Step-by-step explanation:
Lets take two places _ _
Now first position is filled in 4 ways (can use 2 3 7 9) that implies 4C1
then second position is filled in 3 ways since for first position we used a digit
and the condition is that not to repeat the digits, so it is done in 3C1 ways.
so the answer is 4*3 or (4C1*3C1)=12;
pls mark me as brainliest!!please help I dont know how to do this.
Answer: The expression would be 2b+7
Step-by-step explanation:
b will be the number of blue beads for the bracelet.
The number of red beads will be represented as b + 7.
Determine the expression for the total number of beads.
Then we can written it as,
= b + (b +7)
= 2b + 7.