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
Alenkinab [10]
3 years ago
9

Mary has a collection of nickels and quarters for a total value of 4.90.if she has 42 coins total how many of each kind are ther

e
Mathematics
1 answer:
Ray Of Light [21]3 years ago
7 0

Let x be the number of nickels and y be the number of quarters.

Then, x + y = 42 --- (1)

It is given that total value = 4.90.

Therefore, 0.05x + 0.25y = 4.9 --- (2)

Multiply (1) by 0.25

0.25x + 0.25y = 10.5 --- (3)

Now, subtract (2) from (3), we get,

0.2x = 5.6

Divide both sides by 0.2.

x = 28

x + y = 42

y = 42 - x

= 42 - 28

= 14

Hence, Mary has 28 nickels and 14 quarters in total.

You might be interested in
How do I write 1,234,678 in word form
ANTONII [103]

Answer:

one million two hundred thirty four thousand six hundred seventy eight

8 0
3 years ago
Solve for x: |4x + 12| = 16
JulijaS [17]
4x+12=16
4x=4
x=1

or

-(4x+12)=16
-4x-12=16
-4x=28
x=-7

answer Choice C is correct
6 0
3 years ago
Read 2 more answers
The girl needs 322 yards of ribbon the ribbon comes in rolls of 15 yards how many rolls should she buy
vivado [14]
22
please rate brainliest :)
8 0
2 years ago
Read 2 more answers
Consider the gender and class make-up of students at a large university by gender and status as given in the table.
azamat

Answer:

0.589

Step-by-step explanation:

THis is a conditional probability question. Let's look at the formula first:

P (A | B) = P(A∩B)/P(B)

" | " means "given that".

So, it means, the <u><em>"Probabilty A given that B is equal to Probability A intersection B divided by probability of B."</em></u>

<u><em /></u>

So we want to know P (Female | Undergraduate ). This in formula is:

P (Female | Undergraduate) = P (Female ∩ Undergraduate)/P(Undergraduate)

Now,

P (Female ∩ Undergraduate) means what is common in both female and undergraduate? There are 43% female that are undergrads. Hence,

P (Female ∩ Undergraduate) = 0.43

Also,

P (Undergraduate) is how many undergrads are there? There are 73% undergrads, so that is P (undergraduate) = 0.73

<em>plugging into the formula we get:</em>

P (Female | Undergraduate) = P (Female ∩ Undergraduate)/P(Undergraduate)

=0.43/0.73 = 0.589

this is the answer.

4 0
3 years ago
SOLVE BY SUBSTITUTION OR ELIMINATION<br> 7y=9x+20, 33= -12y-7x
grigory [225]

Answer:

Point Form:

(−3,−1)

Equation Form:

x=−3,y=−1

Step-by-step explanation:

3 0
2 years ago
Other questions:
  • Find the exact value of tan(x-y) if sinx=8/17 and cosy=3/5
    5·2 answers
  • together, jason and mara have $74. jason has $6 more than 1/3 as much money as Mara has. how much does each person have?
    6·1 answer
  • What values of x makes this equation true?<br> (2x+6)^2-14=30
    12·1 answer
  • The coordinates for the endpoints of LM are L (-2, -3) and M (4, 5). LM is dilated by a scale factor of ( 1/ 2) from center of d
    15·1 answer
  • Can you help me with numbers 1,2,3 I will mark you Brainiest please I need your help
    14·1 answer
  • Of the following options what could be a possible first step in solving the equation -7x-5=x+3
    7·1 answer
  • Write the ratio of hands to cellphones in simplest form. it was 8 hands and 4 phones
    13·1 answer
  • Is f(x)=x+3 a constant function?
    11·1 answer
  • You are playing a game using the spinners shown.
    12·1 answer
  • PLEASEEE HELPPP ILL GIVE BRAINLY ANSWEAR ALL OF THEM!!!!!
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!