The expression 2.5a+2b gives the cost (in dollars) for a DVDs and b CDs at a moving sale. a. The cost for 1 DVD is $ and the cost for 1 CD is $ . b. The total cost for 4 DVDs and 4 CDs is $ . Question 2 c. Is $20 enough to buy 6 DVDs and 3 CDs?
Answer/Step-by-step Explanation:
Given:
a = no. of DVDs
b = no. of CDs
Total cost ($) for DVDs and CDs = [tex] 2.5a + 2b [/tex]
a. The cost for 1 DVD = 2.5(a) = 2.5(1) = $2.5
The cost for 1 CD = 2(b) = 2(1) = $2
b. Total cost for 4 DVDs and 4 CDs:
Substitute a = 4, and b = 4 into the equation.
[tex] 2.5(4) + 2(4) [/tex]
[tex] 10 + 8 = 18 [/tex]
Total cost for 4 DVDs and 4 CDs = $18
c. To find out if $20 would be enough to buy 6 DVDs and 3 CDs, substitute a = 6, and b = 3 into the equation. Solve for the total cost to see if it equals $20 or is less than $20. If it's greater than $20, then it won't be enough.
[tex] 2.5(6) + 2(3) [/tex]
[tex] 15 + 6 = 21 [/tex]
6 DVDs and 3 CDs cost more than $20, therefore, $20 is not enough.
2. Choose 3 integers less than or equal to 8?
a). x = 8,9,10
b). x =-3,0,10
c), x = 0,1,8
d) x = 2,3,9
Answer:
c
Step-by-step explanation:
because 8 is equal to 8. 0 and 1 are less than 8.
Which shows one way to use
breaking apart to find 6 x 47?
A (1 x 47) - (1 X 6)
B (6 X 4) + (6 X 7)
C (6 X 40) - (1 x 7)
D (6 X 40) + (6 X 7)
WILL GIVE YOU BRAINLIST
Rafe's kiddie pool is shaped like a square with an area of 220ft^2 . What is the approximate side length of the pool? (Between which two whole numbers does it fall?)
Answer:
a≈14.83ft
Step-by-step explanation:
10.
There are estimated 255 births every minute of every day. How many babies are born in the
world each hour?
255
6,120
12,250
15,300
Answer:
15,300
Step-by-step explanation:
multiply the estimated total number of births (255)
times 60 because there is 60 minutes in an hour
255*60= 15,300
Answer:
15,300
Step-by-step explanation:
1 hour: 60 minutes
60 x 255 = 15,300
The total cost, C, to attend a swim meet for a swimmer competing in x events can be modeled using a linear function. Each swimmer will pay a $3.00 entry fee for each event and $8.00 for lunch. Each swimmer may sign up for a maximum of 5 events. What is the range of the function for this situation?
Answer:
The range is between $11 to $23Step-by-step explanation:
let the total cost be c
let the number of events be x
the linear model is
c=3x+8
therefore for 1 event
c=3(1)+8
c=3+8
c=11
=$11
therefore for 5 events
c=3(5)+8
c=15+8
c=23
=$23
The range is between $11 to $23
What value of p makes the equation true?
-3p + 1/8 = -1/4
Answer:
p = 1/8
Step-by-step explanation:
Hi there !
⁸⁾-3p + 1/8 = ²⁾- 1/4
- 24p + 1 = - 2
- 24p = - 2 - 1
- 24p = - 3 | (-)
24p = 3
p = 3⁽³/24
p = 1/8
Good luck !
What is the midpoint of coordinates (-3,5 and 2,-7)
Answer:
-8.5
Step-by-step explanation:
Show or tell work for brainlest and thank and 5.0 rate and follow
Before making invitations, katrina counted the supplies she bought for her party. She counted 36 water balloons and 81 beads to make bracelets. She then needed to decide how many invitations to make.
A. 6
B. 7
C. 9
D. 10
Answer:
9
Step-by-step explanation:
because they are both dividable by nine
Answer:
the answer is c.9
Step-by-step explanation:
if she has 36 water balloons divide 36 by 4 and then you get 9 then divide 81 9 and get 1 so 9 is the answer
NEED RN WORH 100! THANK YOU
Answer:
d im pretty sure
Step-by-step explanation:
I need help fast .
(- 4, 2), (- 2, 5) and (0, 1) slides the triangle 3 units to the right to create an image . What are the vertices of the image ?
Which is NOT a common denominator for 2/3 and 1/2 ?
A. 18
B. 12
C. 6
D. 3
Answer:
D: 3
Step-by-step explanation:
2 is not a factor of three
The number 3 can not be the common denominator for 2/3 and 1/2. The correct option is D.
What is an expression?Expression in maths is defined as the collection of the numbers variables and functions by using signs like addition, subtraction, multiplication, and division.
Numbers (constants), variables, operations, functions, brackets, punctuation, and grouping can all be represented by mathematical symbols, which can also be used to indicate the logical syntax's order of operations and other features.
Any number of equal parts is represented by a fraction, which also represents a portion of a whole. The number of components of a specific size is expressed as a fraction.
The fractions will have all the numbers 18, 12, and 6 as the common denominator but can not have 3 as a common denominator.
Therefore, the number 3 can not be the common denominator for 2/3 and 1/2. The correct option is D.
To know more about fractional expression follow
https://brainly.com/question/78672
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Solve the inequality.−8≤2/5(k−2)
The / is not a division sign.
Answer: x is grater or equal to -18
Inter el notation
[-18,oo)
Step-by-step explanation:
joey has 12 basketballs, which is three times as lisa. lisa has y basketballs. write this situation as an equation
Answer:
12x3=y
Step-by-step explanation:
i am sure there r other ways to write an equation but this is mines: 12x3=y bc 12 is the number of the basketball joey has and they r saying lisa has 3 times more. it tells us the answer is is 3 times more then 12. i recommend u for these problems take them part by part and then set it up.
Answer:
12x3= what
Step-by-step explanation
there r multiple ways to solve this problem
Can someone please help this is for my quarterly and I really need help
Answer:
3.52
Step-by-step explanation:
subtract the price of milk chocolate and caramels
Jason had one hundred fifty-nine dollars to spend six books.After buying them he had fifteen dollars.How much did each book cost.
Answer:
11.5
Step-by-step explanation:
Divide: 159:6-15
Calculate: 26.5-15
\\11.5//
Answer:
24.8333 with 3 repeating.
Step-by-step explanation:
Lets make an equation for this.
159 - x = 15
X is what we are loooking for so lets isolate it.
Subtract 159 on both sides.
-x = -149
Since both are negative we need to simply cross it out.
x = 149
Now he bought six books, so divide 149 by 6.
You would get 24.8333 with the 3 repeating.
You buy a 36-ounce can of tomatoes. How many pints is that?
Answer:
If you buy a 36-ounce can of tomatoes the number of pints will be 2.24
Step-by-step explanation:
1 Fluid Ounces = 0.062 Pints
2.
Kristen invests $5,000 in a bank. The bank pays 6% interest
compounded quarterly. Find, to the nearest cent, the balance
in the account after 5 years. To the nearest year, how long
must she leave the money in the bank for it to double?
Answer:
1. ) $6,734.30
2) 12 years
Step-by-step explanation:
1. we use the compound interest formula for this
Mathematically;
A = P( 1 + r/n)^nt
where P is the principal which is the amount deposited = $5,000
r = rate = 6% = 6/100 = 0.06
n = number of time per year we compound = 4 since it is quarterly
t = number of years = 5
Substituting all of these, we have;
A = 5,000( 1 + 0.06/4)^(4)(5)
A = 5,000( 1 + 0.015)^20
A = 5,000(1.015)^20
A = $6,734.28 which to the nearest cent = $6,734.30
2) For the money to double means that A becomes 2P
Thus;
2P = P( 1 + 0.015)^4t
divide both sides by P
2 = (1.015)^4t
Fine the ln of both sides
ln 2 = 4t ln 1.015
divide both sides by ln 1.015
4t = ln 2/ ln 1.015
4t = 46.56
t = 46.56/4
t = 11.63 which is approximately 12 years
A line that is used to represent the linear trend in the data is called the line of best fit. When finding the error of the line of best fit, which statement holds true? a. If the error is less than one, the line of best fit is the linear equation of the data. b. The smaller the error, the better the fit. c. If the error is greater than one, there is no correlation to the line of best fit. d. The larger the error, the better the fit. Please select the best answer from the choices provided A B C D
Answer:
B
Step-by-step explanation:
Answer:
B
Step-by-step explanation:
i just took the quiz
Writing proportional equations from tables
CCSS.Math: 7.RP.A.2
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The following table shows a proportional relationship between j and m?
j
m
4
3
12
9
20
15
Write an equation to describe the relationship between j and m.
Answer:
4+12+20=j
3+9+15=m
j(answer) + m(answer)
Step-by-step explanation:
3(6+4y)
hurry uppp pleaseeeee
Answer:
=12y+18
Step-by-step explanation:
=(3)(6+4y)
=(3)(6)+(3)(4y)
=18+12y
=12y+18
Answer: its actully 18+12y
Step-by-step explanation:
3 over 5 (r-7) =1
Enter your answer as a mixed number in simplest form in the box
Answer:
r = 8
Step-by-step explanation:
you start by distributing the 5 to r and -7 to get 3 over 5r - 37. You can then multiply both sides by 5r-37 to get 3 = 5r-37. From here you can add 37 to both sides to get 40 = 5r. From there you divide both sides by 5 to get r = 8
Answer:
r= 8
Step-by-step explanation:
Who was Monroe? was he one of our presidents?
Answer:
James Monroe (/mənˈroʊ/; April 28, 1758 – July 4, 1831) was an American statesman, lawyer, diplomat and Founding Father who served as the fifth president of the United States from 1817 to 1825. ... He is perhaps best known for issuing the Monroe Doctrine, a policy of opposing European colonialism in the Americas.
Step-by-step explanation:
Answer:
James Monroe was the 5th president of the United States. He was born April 28, 1758 in Westmoreland County, Virginia. He was chosen as a Virginia representative to the Congress of the Confederation in 1782. In 1808, he ran for president against Madison, but lost. He ran for president in 1816 as a Democratic-Republican and won. He was sworn into office on March 4, 1817. In 1825, Monroe left office and retired in Virginia. He died on July 4, 1831
choose 3 decimals that are greater than 1⁄2, but less than 1
Answer:
0.6 ; 0.7 ; 0.8
Step-by-step explanation:
Change all numbers given to decimals:
1/2 = 0.5
1 = 1.0
Any number that fits x in 0.5 < x < 1.0 is your answer.
Answer choices:
0.6
0.7
0.8
etc.
~
Answer:
0.6, 0.7, 0.8, 0.9
Step-by-step explanation:
1/2 is 0.5 in decimal form. So, decimals that are greater than 0.5 but less than 1 are:
0.6, 0.7, 0.8, and 0.9 etc.
17 × 45 how to solve it
Answer:
765
Step-by-step explanation:
3
17 Multiply 7x5 and 1x5 first. 7x5=35, so we move the 3 above 1 and
x 45 add it to the product of 1x5. 1x5=5+3=8
85 Before we multiply 7x4 and 1x4, put a zero in the ones place.
+680 7x4=28, so we move the 2 above 1 and add it to the product of 1x4.
765 1x4=4+2=6 Add the products, and 765 is the answer!!
Hope this helps...have a great day C:
I NEED HELP NOW 50 POINTS
Answer:
x1:0 , x2 : 1
Step-by-step explanation:
Answer:
A c is 1 and equation B d is 1
by which rule are these triangles congruent ?
A) AAS
B) ASA
C) SAS
D) SSS
Answer:
ASA
Step-by-step explanation:
Just answered this question
Joshua plans to buy x pencils and one notebook at the schoolstore. A pencil costs $0.10 and a notebook costs $1.25. Joshua
has $7.00
Iln
The distance between Walmart and Mrs. Stivers house is 8km. There are 1.6
km in 1 mile. How many miles apart is Mrs. Stivers house and Walmart?
Answer:
5 miles
Step-by-step explanation:
Divide 8 by 1.6 and the answer is 5. I hope this helped:)
Who can help me find the slope to the graph? Please help it’s due soon
