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
Rus_ich [418]
2 years ago
13

dennis mowed his next door neighbors lawn for a handful of dimes and nickels, 80 coins in all. upon completing the job he counte

d out the coins and it came to 6.60. how many of each coin did he earn?
Mathematics
1 answer:
Serggg [28]2 years ago
7 0

Answer:

52 dimes and 28 nickels

Step-by-step explanation:

n = number of nickels

d = number of dimes

n+d = 80   the number of coins he got

Multiply the number of nickels times .05 plus the number of dimes times .10 to equal the amount of money he got

.05n + .10d = 6.60

Divide this equation by .05

.05n/.05  + .10/.05 = 6.60/.05

n + 2d = 132

n+d = 80

Multiply by -1

-n-d=-80

Add this to n+2d = 132

n+2d=132

-n-d=-80

-------------------

d = 52

Now we need to solve for n

n+d = 80

n+52 = 80

Subtract 52 from each side

n+52-52= 80-52

n = 28


You might be interested in
Which function matches the graph below?
faust18 [17]
Try number 1 hope it’s correct
7 0
2 years ago
Order the following from Least to Greatest (draw a number line)<br><br> l-6l, -3, 0, -1
Anarel [89]
-6,-3,-1,0 A million apologies if I’m wrong half of my brain is still on vacation

8 0
3 years ago
Please reply to my question I will surely mark u as brainly
pshichka [43]

Answer:

I might be wrong but I think the answered would be 14

Step-by-step explanation:

5+5=10+3=13+1=14

6 0
2 years ago
3. Liam has a rectangular back
MA_775_DIABLO [31]

Answer:

Length of the other side of the backyard is 80.4 feet.

Step-by-step explanation:

Let the dimensions of the Liam's rectangular backyard = 85 feet × a feet

Diagonal of the rectangle, AD = 117 feet

When we apply Pythagoras theorem in ΔABD,

AD² = AB² + BD²

(117)² = (85)² + BD²

a² = 13689 - 7225

a = √6464

  = 80.399 feet

a ≈ 80.4 feet

Therefore, length of the other side of the backyard is 80.4 feet.

3 0
2 years ago
q cyclist rode 3.75 miles in 0.3 hours. How fast was she going in miles per hour. at that rate how long will it take her to go 4
Xelga [282]

Answer:

the cyclist was going 12.5 mph

at that rate she will travel 4.5 miles in 21 minutes and 36 seconds.

7 0
3 years ago
Read 2 more answers
Other questions:
  • Solve -5 = x - 3y<br><br> Solve 11 = -3x + 7y
    5·1 answer
  • Segments AB and CD belong to the same line. We know that they overlap. AB = a and CD = b, and the overlapping part measures c. D
    15·1 answer
  • ??????could anyone help
    15·1 answer
  • A random number generator that draws digits at random with replacement from {0,1,2,3,4,5,6,7,8,9} is run three times. Find the c
    8·1 answer
  • Really don’t understand this
    5·2 answers
  • The square pyramid shown below has a volume of 360 ft³. find the height of the pyramid ​
    14·1 answer
  • Find the volume. round your answer to the nearest hundredth
    9·1 answer
  • Someone pls pls pls help
    10·1 answer
  • Can you guy help me I am stuck
    6·2 answers
  • The record high temperature recorded one year was 93°F while the record low temperature that year was -21°F. How much warmer was
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!