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]
3 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]3 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
Construct a bar graph for the relative frequencies given
SVEN [57.7K]
Yes this is not correct br
5 0
2 years ago
A food truck sells tacos for 6.50 each and burritos for 7.50 each. The food truck's revenue from selling a total of 164 tacos an
olga55 [171]

Answer:

12 burritos and 167 tacos

Step-by-step explanation: 164 x 6.5 = 1066

1157 - 1066 = 91

91/7.5 about 12

164 tacos and 12 burritos

5 0
3 years ago
If $-2 < x \le 3,$ then find all possible values of $5x + 1.$ Give your answer in interval notation.
kotegsom [21]

Answer: (-9, 16]

This is the interval from -9 to 16. Exclude -9 but include 16.

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

Work Shown:

The idea is to multiply all sides by 5, then add 1 to all sides

-2 < x \le 3

5(-2) < 5x \le 5(3)

-10 < 5x \le 15

-10+1 < 5x+1 \le 15+1

-9 < 5x+1 \le 16

This converts to the interval notation  (-9, 16]

note: a curved parenthesis means "do not include this value in the solution set"; while a square bracket has us include the value. So we exclude -9 and include 16.

3 0
3 years ago
Solve 7 ÷ one half = ___.<br> Question 1 options:<br><br> 14<br><br> 15<br><br> 24<br><br> 40
Norma-Jean [14]

Answer:

O 14

Step-by-step explanation:

hope it is helpful :)

7 0
2 years ago
A sports equipment store rents road bikes for $23 an hour.
kobusy [5.1K]

Answer:

$24,840

Step-by-step explanation:

Please mark brainliest.

6 0
3 years ago
Other questions:
  • Which of the following is the independent variable of F(G(X))?
    5·1 answer
  • What is the gcf of 12 35 15
    14·2 answers
  • What do a rectangle and a rhombus have in common? Select all that apply. The opposite sides are parallel. They have four right a
    15·1 answer
  • How to figure it out
    14·1 answer
  • Find sec Θ if the terminal side of Θ in standard position contains the point (4, -3)
    7·2 answers
  • Please help me ASAP I’ll mark Brainly
    12·1 answer
  • Which are like terms<br> will give brainest if correct
    9·2 answers
  • The following ordered pairs model a linear function rule.
    5·2 answers
  • HELPPP ON GEOMETRY PLZZ!!! No links i will report.
    11·2 answers
  • Change this equation to slope intercept form <br> -3x+2y=10 <br><br> PLEASE HELP
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!