1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Elena-2011 [213]
3 years ago
14

One week, Isabelle bought 2 bags of apples and 3 bags of oranges. The next week, she bought 1 bag of apples and 2 bags of orange

s. If a represents the cost of each bag of apples and r represents the cost of each bag of oranges, which expression could Isabelle use to calculate the difference between the amounts she spent each week?
Mathematics
2 answers:
Alinara [238K]3 years ago
5 0

Answer:

-a-r OR a+r

Step-by-step explanation:


<u>First week cost of Isabelle:</u>

2 bags of apples at a price of a each, so total cost is 2a

3 bags of oranges at a price of r each, so total cost is 3r

Sum of these two: 2a+3r


<u>Second week cost of Isabelle:</u>

1 bag of apple at a price of a each, so total cost is a

2 bags of oranges at a price of r each, so total cost is 2r

Sum of these two: a+2r


<u>Depending on the price of bags of apples and oranges, the second week can cost more, or the first week's total could be more.</u>


  • <em>If 2nd weeks total is more than 1st week's total:</em>

The difference is 2nd week's total minus first week's total:

(a+2r)-(2a+3r)\\=-a-r

  • <em>If 1st weeks total is more than 2nd week's total:</em>

The difference is 1st week's total minus second week's total:

(2a+3r)-(a+2r)\\=a+r


kenny6666 [7]3 years ago
4 0

Answer: D (2a+3r)-(a +2r)

Step-by-step explanation:

Right in edge 2020

You might be interested in
The function c(t) represents the total cost for a quilter to make t quilts. c(t)=55t+175 what does the value 55 represent in thi
zmey [24]
For each quilt made, the cost increases by $55. I just took the quiz so it's 100% correct.
5 0
3 years ago
Read 2 more answers
∫ (3x²-2)/x³ dx<br><br> help
pychu [463]
We will use integration by substitution, as well as the integrals
∫
1
x
d
x
=
ln
|
x
|
+
C
and
∫
1
d
x
=
x
+
C
∫
x
3
x
2
+
1
d
x
=
∫
x
2
x
2
+
1
x
d
x
=
1
2
∫
(
x
2
+
1
)
−
1
x
2
+
1
2
x
d
x
Let
u
=
x
2
+
1
⇒
d
u
=
2
x
d
x
. Then
1
2
∫
(
x
2
+
1
)
−
1
x
2
+
1
2
x
d
x
=
1
2
∫
u
−
1
u
d
u
=
1
2
∫
(
1
−
1
u
)
d
u
=
1
2
(
u
−
ln
|
u
|
)
+
C
=
x
2
+
1
2
−
ln
(
x
2
+
1
)
2
+
C
=
x
2
2
−
ln
(
x
2
+
1
)
2
+
1
2
+
C
=
x
2
−
ln
(
x
2
+
1
)
2
+
C
Final answer
4 0
3 years ago
I need help with this word problem it’s urgent please help.
harkovskaia [24]

Starting with some solution of volume <em>v</em> and an alcohol concentration of 100<em>c </em>% , if you add 180 mL of 45% isopropyl to it, you get a mixture with a total volume of 180 mL + <em>v</em>.

Each mL of the starting solution contains <em>c</em> mL of alcohol. For example, if the concentration of the starting solution is 80% (so <em>c</em> = 0.8), then each mL contains 80% = 0.8 of one mL of alcohol.

Similarly, each mL of the added solution with 45% concentration contains 0.45 mL of alcohol.

You want the new solution to have a concentration of 70%, so that the ratio of the amount of alcohol in it to the total volume is 70%, meaning

<em>cv</em> + 0.45 (180 mL) = 0.7 (180 mL + <em>v</em>)

and you want to solve for <em>v</em> :

<em>cv</em> + 81 mL = 126 mL + 0.7<em>v</em>

<em>cv</em> - 0.7<em>v</em> = 126 mL - 81 mL

(<em>c</em> - 0.7) <em>v</em> = 45 mL

<em>v</em> = (45 mL) / (<em>c</em> - 0.7)

Judging by context clues, <em>c</em> lies somewhere between 0.7 and 1. (It can't be less than 0.7 because mixing this solution with any other solution of smaller concentration will never yield a solution of higher concentration.)

If, for example, <em>c</em> = 0.8, so that your starting solution is at 80% concentration, then you would need

<em>v</em> = (45 mL) / (0.8 - 0.7) = 450 mL

to be mixed with 180 mL of 45% solution to end up with 180 mL + 450 mL = 630 mL of 70% solution.

As another example, if you're mixing pure alcohol, so that <em>c</em> = 1, you would need

<em>v</em> = (45 mL) / (1 - 0.7) = 150 mL

to make a 180 mL + 150 mL = 330 mL batch of 70% solution. The fact that you would need less of a higher concentration solution is not surprising.

3 0
3 years ago
1
Tomtit [17]

Answer:

There are 40 musicians that are only marching band.

Step-by-step explanation:

Since we knot that there are 25 musicians that do both that means there is 60 - 25 = 35 musicians who do only jazz band. From his we can answer the question because....

100 = a + b + c

Where "a" is the number of musicians who go only to jazz, "b" is the number of people who do both, and "c"  is the number of people that go only to the marching band. From here we can do this....

100 = a + b + c

c = 100 - a - b

Substitute the value we found outa and get.....

c = 100 - 35 - 25

c = 40

3 0
3 years ago
Read 2 more answers
What ratio is less than 15:24.these are the answer choices  &gt; 1:2, 7:8, 19:24, 6:8
Drupady [299]
15:24 is divisible by 3, simplifying it down to 3:8. 19:24, 7:8, and 6:8 are all obviously larger than this ratio, and 1:2 can be equalized to 4:8, which is also bigger than 3:8, so none of the answer choices are less than 15:24.
5 0
3 years ago
Read 2 more answers
Other questions:
  • Please help, polygon she the A-C
    11·1 answer
  • Which of the following functions is graphed below?​
    11·1 answer
  • 9a+6s equals cost for a adults and s students
    13·2 answers
  • A certain alloy contains 5.25% copper. How much is there in a piece weighing 200 pounds?
    10·2 answers
  • A computer chip manufacturer made 270,000 chips last week. If 8% of them were defective, how many defective chips were made?
    11·1 answer
  • Mowing lawns earns $10.00 for 1 hour and $42.00 for 5 hours. what is the slope
    5·1 answer
  • Help if you can. Thank You.
    14·1 answer
  • Last night, grandma let the children choose cookies or ice cream for dessert. She has 68 desserts n all,which 17 of which were i
    10·1 answer
  • Please help me I don’t know the answer and I need somebody to help me
    10·2 answers
  • 10 more than the difference of 6m and 3. Write the sentence as a numerical expression
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!