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
Dominik [7]
2 years ago
13

Miguel has a total of 27 dimes and nickels. The total value of the coins is $1.80. How many dimes and nickels does he have?

Mathematics
1 answer:
soldi70 [24.7K]2 years ago
5 0

Answer:

There are 9 dimes and 18 nickels.

Step-by-step explanation:

Let d = be the number of dimes

 

     n = be the number of nickels

 

 

    d + n = 27...eq.1

 

   0.10d + 0.05n = 1.80...eq.2

 

Solve the system of equations

 

   d + n = 27

 

10d + 5n = 180  ( multiply eq.2 by 100 )

 

 -5d - 5n = -135

 

      5d = 45

 

       

        d = 9 , there are 9 dimes so,0.90

 

        n = 27 - 9 = 18,   there are 18 nickels so, 0.90

 

To check:   9 dimes + 18 nickels = 27 coins

 

                0.90 + 0.90 = $ 1.80 total value of the coins

You might be interested in
how many such tests would it take for the probability of committing at least one type i error to be at least 0.7? (round your an
drek231 [11]

The number of tests that it would take for the probability of committing at least one type I error to be at least 0.7 is 118   .

In the question ,

it is given that ,

the probability of committing at least , type I error is = 0.7

we  have to find the number of tests ,

let the number of test be n ,

the above mentioned situation can be written as

1 - P(no type I error is committed) ≥ P(at least type I error is committed)

which is written as ,

1 - (1 - 0.01)ⁿ ≥ 0.7

-(0.99)ⁿ ≥ 0.7 - 1

(0.99)ⁿ ≤ 0.3

On further simplification ,

we get ,

n ≈ 118 .

Therefore , the number of tests are 118 .

Learn more about Error here

brainly.com/question/17062640

#SPJ4

4 0
1 year ago
Mark spent 135$ on his comic book collection. he just sold it online for 310$. approximately what is the profit as a percent of
V125BC [204]

Answer:

It would be B

Step-by-step explanation:

310-135=175

175/135

7 0
2 years ago
Read 2 more answers
Eliminate the parameter. x = t2 + 2, y = t2 - 4
stepan [7]
\bf \begin{cases}
x=t^2+2\implies x-2=t^2\implies \sqrt{x-2}=\boxed{t}\\\\
y=t^2-4\\
----------\\
y=\left( \boxed{\sqrt{x-2}} \right)^2-4\implies y=x-2-4\\\\
y=x-6
\end{cases}

just a plain vanilla substitution

8 0
3 years ago
Read 2 more answers
The table shows ticket prices for the local minor
Zanzabum

Answer:

2x club member ticket = 1x non-club member ticket

6 0
3 years ago
Read 2 more answers
What is equivalent to 5x+2y=12
lara31 [8.8K]

Answer:

A

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Other questions:
  • How many hundredths are 20 thousandths
    14·1 answer
  • Henry's wage is £450 per week.
    13·1 answer
  • I need help plsss<br> Nowww
    11·1 answer
  • Plz help no guessing
    9·1 answer
  • If f(x) = 5x^2 -13 and g(x) =8x^3 +4, find (f+g)(x)
    14·2 answers
  • Please Help Me! This Is Due Soon.
    7·1 answer
  • 4d = -16 <br><br> what’s the value of d
    10·2 answers
  • Pls help! due tonight! Will give brainliest! And pls explain! 16 points!
    9·1 answer
  • Alice and Shivani went to lunch at a cafe. They ordered a spinach salad for $5.75, a tuna sandwich for $7.20, and 2 glasses of l
    5·1 answer
  • Pls help me: A couple plans to have 4 children. The gender of each child is equally likely. Design a simulation involving 90 tri
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!