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
nasty-shy [4]
3 years ago
12

6

Mathematics
1 answer:
Juliette [100K]3 years ago
3 0

Answer:

n = 12, q = 9

Step-by-step explanation:

The simultaneous equation that represents the expression is;

n + q = 21 .......... 1

0.05n + 0.25q = 2.85 ........ 2

Multiply equation 2 by 100 to have;

5n + 25q = 285

n + 5q = 57

____________________________________

n + 5q = 57

n + q = 21

Substract the resulting equations

5q-q = 57-21

4q = 36

q = 36/4

q = 9

Substitute q = 9 into eqn 1;

From 1; n+q = 21

n = 21-q

n = 21-9

n = 12

Hence she has 12 nickels and 9 quarters

You might be interested in
Write prime factorizations of the number 18.
Nat2105 [25]

Answer:

18 is a composite number. 18 = 1 x 18, 2 x 9, or 3 x 6. Factors of 18: 1, 2, 3, 6, 9, 18.

Prime factorization: 18 = 2 x 3 x 3, which can also be written 18 = 2 x 3²

<em>hope the answer helped:)</em>

4 0
3 years ago
Please help!!!!!!! Which of the following options is an equivalent function to f(x)=3(2)^3x
pav-90 [236]

A:    f(x) = 3(8)^x.

It's the first option!

Hope you have a good day! <3

8 0
4 years ago
Read 2 more answers
The sum of 1/3 of a number and 12
muminat

Start by assigning a variable name to the "number" -- call it x.

Now write out what they say:

"The product of 1/3 and the sum of a number and 3" -- that's 1/3 times x + 3, or (1/3)(x + 3) or (x + 3) / 3

It's "between negative one and five"

So that means:

-1 < (x + 3) / 3 < 5

So now solve this inequality.  First multiply everything by 3.

-3 < x + 3 < 15

Subtract 3 from all the terms:

-6 < x < 12

So the answer is, all numbers between -6 and 12

7 0
3 years ago
Read 2 more answers
How to add and subtract radians for trig
ELEN [110]
The same way you add and subtract any pair of fractions. You need to make sure the denominators are equal. Once they are equal, you can add or subtract the numerators and place the result over the common denominators.
8 0
3 years ago
Read 2 more answers
What is the area of the shape shown?
Levart [38]
378 cm Is the correct answer i believe
4 0
3 years ago
Read 2 more answers
Other questions:
  • 5/6 + 3/7 <br><br> Please Help thanks
    12·1 answer
  • Carl has three lengths of cable, 5/6 yard long, 1/4 yard long, and 2/3 yard long. after Carl has used 1 yard of cable, how much
    8·1 answer
  • A round patio is 14m in diameter what is the distance around the patio
    15·2 answers
  • Someone please help me??
    10·1 answer
  • A book sold 36,600 copies in its first month of release. Suppose this represents 7.1% of the number of copies sold to date. How
    8·1 answer
  • -6(v+4)=4v-2v+8<br> pls helpp
    6·1 answer
  • Each day, Robert eats 40% of the pistachios left
    14·1 answer
  • Please help me i only know that it is irrational
    9·1 answer
  • Write (5/3) ^3 as a quotient of powers
    13·1 answer
  • The camp cook made 1 1/2 pots of chicken soup. Each serving of soup is 1/4 of a pot. How many servings of chicken soup did the c
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!