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
madreJ [45]
3 years ago
6

Jo jo has a total amount of $12.45 in quarters and dimes in his pocket. he has a total of 60 coins. how many quarters and dimes

does jo jo have?
a. 42 quarters and 18 dimes b. 43 quarters and 17 dimes
c. 44 quarters and 16 dimes d. 41 quarters and 19 dimes
e. 40 quarters and 20 dimes

NEED ANSWERED ASAPP!!!

Mathematics
1 answer:
baherus [9]3 years ago
8 0

Given:

Total number of coins (Quarters and dimes) = 60

Total amount = $12.45

To find:

The number of quarters and dimes.

Solution:

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

We know that,

1 quarter = 0.25 dollar

1 dime = 0.10 dollar

Total coins: x+y=60               ...(i)

Total amount: 0.25x+0.10y=12.45             ...(ii)

From (i), we get

y=60-x          ...(iii)

Putting this value in (ii), we get

0.25x+0.10(60-x)=12.45

0.25x+6-0.10x=12.45

0.25x-0.10x=12.45-6

0.15x=6.45

Divide both sides by 0.15.

x=\dfrac{6.45}{0.15}

x=43

Putting x=43 in (iii), we get

y=60-43

y=17

So, the number of quarters is 43 and the number of dimes is 17.

Therefore, the correct option is b.

You might be interested in
Simplify 4 to the 7th over 5 squared all raised to the 3rd power
alisha [4.7K]
<h2>Answer:</h2>

\left(\frac{4^{21}}{5^6}\right)

or

4 to the 21st over 5 to the 6th.

<h2>Step-by-step explanation:</h2>

First, we need to write our expression. Let's do it step by step:

<u>4 to the 7th:</u>

4^7

<u>5 squared:</u>

5^2

<u>4 to the 7th over 5 squared:</u>

\frac{4^7}{5^2}

<u>4 to the 7th over 5 squared all raised to the 3rd power:</u>

<u>\left(\frac{4^7}{5^2}\right)^3</u>

Using the law of exponents:

\left(\frac{4^{7\times 3}}{5^{2\times 3}}\right) \\ \\ \left(\frac{4^{21}}{5^6}\right)

Finally, the answer is 4 to the 21st over 5 to the 6th.

8 0
3 years ago
Read 2 more answers
Which of the following types of scientists might study the events that take place in the area labeled by letter d?
alex41 [277]

Answer: D

Step-by-step explanation:A scientist who studies the objects in the sky, including planets, galaxies, black holes, and stars, is called an astronomer

4 0
3 years ago
1.) Max is driving 42 miles per hour. A dog dog runs into the street and max reacts in about three quarters of a second. What is
Nostrana [21]

Answer: 14.07\ m

Step-by-step explanation:

Given

Max is driving at a speed of 42\ mph

It took him three-quarters of a second i.e. 0.75\ s

Speed in meter per second is 18.77\ m/s

Distance is given by

d=v\times t

Reaction distance is

d=18.77\times 0.75=14.07\ m

5 0
3 years ago
4.1338 divide by 0.22
Murljashka [212]

I got the answer 18.79

I believe this is correct, Please tell me if im wrong. :)

3 0
3 years ago
Read 2 more answers
Select two ratios that are equivalent to 4:18
steposvetlana [31]

Answer:

2:9

Step-by-step explanation

4:18 divided by 2 is the lowest it can go so 4 divided by 2 is 2

18 divided by 2 is 9 so,

2:9

4 0
3 years ago
Read 2 more answers
Other questions:
  • Let f(x) = 4x3 + 3x2 − 20x − 15 and g(x) = 4x + 3. Find f of x over g of x.
    12·1 answer
  • What is the total amount in an account that has had $45 per month added into it for 30 years and grew with an annual interest ra
    12·1 answer
  • Please help!!! Use an algebraic equation to solve the problem. The sides of a triangle are in the ratio 3 : 4 : 5. What is the l
    12·2 answers
  • Express f in standard form: f(x) = x^2 − 2x + 3
    10·1 answer
  • BRAINLIESTTT ASAP!!!!
    10·1 answer
  • Solve -5.55-8.55c+4.35c for me please
    9·1 answer
  • Here are four digits 9 4 7 5 use two of these digits to make the largest possible two digit number
    13·1 answer
  • Find the long multiplication answer for 7/10
    12·1 answer
  • PLEASE HELP! Yes or no answer on the graph
    15·2 answers
  • Will be marked the brainliest if correct
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!