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
skad [1K]
3 years ago
7

There are x students in Ms, Smith's class and 3/4 of them like pizza. If 21 of the

Mathematics
1 answer:
kicyunya [14]3 years ago
7 0

Answer:

3/4 of 21

Step-by-step explanation:

You might be interested in
1. A student took 60 minutes to answer a combination of 20 multiple-choice and extended-response questions. She took 2 minutes t
Darina [25.2K]

Answer:

1) m=15 and r =5

2) 4 and 2 ml

3) x= 0.5 and y = -1

Step-by-step explanation:

given that m multiple choice questions and r extended response questions.

Also given that a) m+r = total no of questions =20 ... i and

                        2m+6r = total time taken = 60  ... ii

b) Divide second equation by 2, m+3r = 30  ... iii

                                                  m+r  = 20   ... i

Subtract to get 2r =10 or r =5

m = 20-5 = 15

Verify: m+r = 15+5 =20

and     2m+6r = 30+30 = 60 minutes.  

Hence verified

--------------------------------------

2) Let a litres of 20% solution and b litres of 50% solution be mixed

a) Then total volume = 6 ml = a+b  ... i

Resulting solution = 30% of 6 ml = 1.8 = 0.2a+0.5b ... ii

b) Solve i and ii

b = 6-a: substitute in ii.

0.2a + 3-0.5a = 1.8

Or a = 4 ml and b = 2ml

Verify: Total volume = a+b =6ml and

concentration = 0.2(4)+0.5(2) = 1.8 = 30% of 6 ml.

Thus verified

---------------------------------

3) 2x-3y=4 ...i

  2x-5y =6... ii

Because x term has the same coefficient in both the equations, elimination is easier.

i-ii gives 2y =-2 or y =-1

Substitute in i, 2x+3 =4 or x = 0.5

So answer is x = 0.5 and y =1


6 0
3 years ago
The indoor climbing gym is a popular field trip destination. This year the senior class at High School A and the senior class at
Tamiku [17]

Answer:

50 students per bus and 9 students per van

Step-by-step explanation:

I just guessed until I got it right, so I don't really have a method. If I ever find a better way of doing it, I'll edit my answer.

7 0
3 years ago
Pls help!!! will give brainliest
patriot [66]

Answer:

im not very good at geometry but is there any choices you could pick from

Step-by-step explanation:


4 0
3 years ago
Does point A on the graph represent a pair of possible values of m and w?
iris [78.8K]

Answer:

No, because 30 is not equal to 2.5 times 6

Step-by-step explanation:

2.5 times 6 = 15

4 0
3 years ago
Read 2 more answers
What is the answer??
user100 [1]

Answer:

letter C is the right answer

4 0
3 years ago
Read 2 more answers
Other questions:
  • C=48y+0.99n solve for y
    14·1 answer
  • Look at the formula for the area of a triangle. a = 1 2 bh which is a solution for h?
    15·1 answer
  • NEED HELP ASAP!!!!!!!!!! SOS!!!!!!!!!!!
    15·1 answer
  • How to solve? I basically want to know the first step..
    11·2 answers
  • POINTS GIVEN HELP ME PLS POINTS WILL BE GUVEN
    7·1 answer
  • HELPP!!!! YOU'LL GET 80 POINTS AND BE BRAINLIEST
    6·1 answer
  • I just need someone to guess which answer is right A B C D
    15·2 answers
  • Correct answer gets brainliest!<br>find two expressions whose difference is 3x + 4​
    12·1 answer
  • The weight of an object on moon is 1/6 of its weight on Earth. If weight of an object on Earth is 18/5 kg, what would be its wei
    5·2 answers
  • • Aisha has an agreed overdraft on her account
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!