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
Mekhanik [1.2K]
3 years ago
10

In Chad's reading class, all the students are reading the same book. The school bought each student a book at $7 per book. If th

ere are 27 students in Chad's class, which of the following expressions could not be used to calculate the total cost?
7(20) + 7(7), 7(30) - 7(3) 7(30) - 7(7)
Mathematics
1 answer:
Allushta [10]3 years ago
6 0
The last one 7(30)-7(7) because if you do it then it is 7(23) which doesn’t make sense because it is 27 we need to find
You might be interested in
Use the graph that shows the solution to f(x)=g(x)
Radda [10]
Add 2 to both sides and x will equal 2
5 0
3 years ago
Isotope mass (amu) abundance (%) 1 203.97304 1.390 2 205.97447 24.11 3 206.97590 22.09 4 207.97665 52.41 find the atomic mass of
Nata [24]
Answer:
average atomic mass = 207.2172085 amu

Explanation:
To get the average atomic mass of an element using the abundance of its isotopes, all you have to do is multiply each isotope by its percentage of abundance and then sum up all the products.

For the question, we have:
203.97304 amu has an abundance of <span>1.390% (0.0139)
</span>205.97447 amu has an abundance of 24.11% (0.2411)
206.97590 amu has an abundance of 22.09% (0.2209)
207.97665 amu has an abundance of 52.41 % (0.5241)

The average atomic mass can be calculated as follows:
average atomic mass = 203.97304(0.0139) + 205.97447(0.2411)
                                     + 206.97590(0.2209) + 207.97665(0.5241)
average atomic mass = 207.2172085 amu

Hope this helps :)
7 0
3 years ago
Diego's club earns money for charity when members of the club perform community service after school,each student who does commu
Arlecino [84]

Answer:

No

Step-by-step explanation:

Given that:

Amount earned when a student does comminty service = $5

Number of students in club = 12

Amount earned E, is a function of number of members (n) who does community service.

Hence,

E = n * amount earned per member

Is 24 a possible output?

To test, then E = 24

24 = n * 5

24 = 5n

24/5 = 5n/5

4.8 = 5

Hence, 24 is not a possible output, be use number of membwra cannot be a decimal

4 0
3 years ago
Need help with 2 questions.
Gala2k [10]
The first one is D
The second one is true
3 0
3 years ago
Read 2 more answers
If y varies directly as x, find the constant of variation if y = 5 when x = -0.1.
lisabon 2012 [21]
Y=kx......5=0.1k....k=5/0.1.....k=50
3 0
3 years ago
Other questions:
  • Solve. −4.2y+2.1&gt;−2.52 Drag and drop a number or symbol into each box to show the solution. &lt;&gt;0.11.14.62−4.62 y
    9·2 answers
  • a line that passes through the point (–1, 3) has a slope of 2. find another point on the line. a. (–3, 2) b. (0, 5) c. (1, 5) d.
    12·1 answer
  • What is the 30th term of the sequence 7, 16, 25, 34,
    15·1 answer
  • What statements is equal to the expression p\11
    15·1 answer
  • Which of the following is the graph of the quadratic function y - x? +10x+16 ?
    7·1 answer
  • Evaluate:|-12| - |4|- |-8|?​
    6·2 answers
  • W(x) = x2 + 1; Find w(x + 3)
    7·1 answer
  • Plz help will give Brainliest
    15·2 answers
  • Please help!! I have less than an hour to turn this in!
    8·1 answer
  • Box A has a volume of 48 cubic meters. Box B is similar to Box A. To create Box B, Box A's dimensions were doubled. What is the
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!