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
anzhelika [568]
2 years ago
13

Which system of equations could be used to determine how many of each coin you have

Mathematics
1 answer:
kirza4 [7]2 years ago
8 0
<h3>Answer: Choice A</h3>

0.10d + 0.05n = 2.25

d = 2n

================================================

Explanation:

n = number of nickels

d = number of dimes

we have twice as many dimes as nickels, so we could have something like 18 dimes and 9 nickels. Algebraically we would write d = 18 and n = 9. The equation that fits this is d = 2n. The answer is between A and B at this point.

We rule out choice B since the 0.05d is incorrect. It should be 0.10d to represent the total value of all the dimes.

Choice A is correct

d = number of dimes

0.10d = value of all the dimes in dollars

n = number of nickels

0.05n = value of all the nickels in dollars

0.10d + 0.05n = total value from both coins combined

2.25 =  total value from both coins combined

0.10d + 0.05n = 2.25

You might be interested in
Ten years ago, Rapunzel's hair was 19 long. Now her hair is 20193 long. Approximately how many times as long is Rapunzel's hair
vladimir2022 [97]

Answer:

A.

Step-by-step explanation:

if you simplify the equation on A., you'll get 1,000 as the number.  Rapunzel's hair was approximately 1,000 times longer than it was 10 years ago.

8 0
3 years ago
Boston, Massachusetts had a population of 617,594 people during January 1 2010, and 675,647 people on January 1 2020.
tigry1 [53]

Answer:

  • See below

Step-by-step explanation:

<u>Exponential function is:</u>

  • y = abˣ

<u>If we consider the time difference in years as x and the initial population as a, then we get:</u>

  • 675647 = 617594*b¹⁰

<u>Find the value of b:</u>

  • b¹⁰ = 675647/617594
  • b¹⁰ = 1.09399864636
  • b = 1.09399864636^(1/10)
  • b = 1.009 (rounded)

<u>The equation we got is:</u>

  • y = 617594*1.009ˣ

Here we have y- population after x years since 2010, x - the number of years since 2010 and 1.009 is the population growth rate.

5 0
1 year ago
Show how to rewrite 1/5 with the denominator 10.
Gnoma [55]

Answer:

first blank: 2

second blank: 2

8 0
2 years ago
Point O is the incenter of ΔABC.<br><br> What is mQBO?<br><br> mQBO is ___ degrees.
natta225 [31]
The answer is 12 degrees
5 0
3 years ago
Read 2 more answers
Whatvis the standard form of two hundred ten million sixty four thousand fifty?
Flauer [41]
210,064,050 is your answer
4 0
3 years ago
Other questions:
  • 8(-6a+2)+(-5)(-9a+2)
    15·2 answers
  • Simplify 9(8+4) and explain how
    13·2 answers
  • What is the nth term of the sequence below?
    15·1 answer
  • The difference between 3 1/2 and 1 4/5<br><br> a 2 4/5<br> b 2 7/10<br> c 1 4/5<br> d 1 7/10
    5·2 answers
  • Anyone willing to help me?
    15·1 answer
  • Maya is on her way home in her car. She has driven 12 miles so far, which is one-third of the way home. What is the total length
    10·2 answers
  • Betwermie which of the following relation ships are true. select one that applies
    7·2 answers
  • 1. A multi-cab starter motor has a current of 60.0 A and a voltage of 12 V. What is
    7·1 answer
  • Find each missing measure for 1, 2, 3, and 4. Giving brainliest!
    11·2 answers
  • 1. Find the derivative with respect to x of x +1/x from first principle. <br>​
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!