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
8090 [49]
3 years ago
14

A man has 14 coins in his pocket, all of which are dimes and quarters. if the total value of his change is $1.70, how many dimes

and how many quarters does he have?
Mathematics
1 answer:
DaniilM [7]3 years ago
8 0
D + q = 14....d = 14 - q
0.10d + 0.25q = 1.70

0.10(14 - q) + 0.25q = 1.70
1.40 - 0.10q + 0.25q = 1.70
-0.10q + 0.25q = 1.70 - 1.40
0.15q = 0.30
q = 0.30 / 0.15
q = 2 <=== 2 quarters

d + q = 14
d + 2 = 14
d = 14 - 2
d = 12 <=== 12 dimes
You might be interested in
10% of £26 is equal to x% of £52. Calculate the value of x.<br><br>​
irina1246 [14]

Answer:

5

Step-by-step explanation:

26 × 10 ÷ 100 = 52 · x ÷ 100

260 = 52 · x

x = 5

6 0
3 years ago
Consider the following argument: If pigs have wings, then pigs can fly. If pigs are lighter than air, then pigs can fly. Pigs ha
Darina [25.2K]

Answer:

a ) If r ⇒ p

    If q ⇒ p

    r ∪ q

    If r∪p ⇒ ¬ r

   ∴ s

b) The argument is invalid

Step-by-step explanation:

The argument is invalid because we do not with precision if b), because we do not have enough information about it, and this is because the previous sentences does not mention information about the donkey. We cannot infer something when we do not have enough information.

3 0
3 years ago
Which is the least ...0.105 0.501 0.015 0.15
sergeinik [125]
The least is 0,015

hope this will help you 
3 0
3 years ago
Read 2 more answers
Among all pairs of numbers with a sum of 238238, find the pair whose product is maximum. Write your answers as fractions reduced
mylen [45]

Answer:

x=119119,\;\;\;y=119119

Step-by-step explanation:

Let the x be the first number, y be the second number and p be the product of the first and second number.

i.e  x+y=238238   \Rightarrow x=238238-y

      p=xy

   \Rightarrow p=(238238-y)y\\\Rightarrow p=238238y-y^2

\Rightarrow \frac{dp}{dy} =238238-2y\\\Rightarrow 0=238238-2y\\\Rightarrow 2y=238238\\\Rightarrow y=119119

Now,

x=238238-119119\\\\ \Rightarrow x=119119

Hence, x=119119,\;\;\;y=119119

   

8 0
2 years ago
Harry made fruit punch using 2 parts orange juice to 2 parts soda water. The amount of soda water that Harry used is directly pr
Sindrei [870]

y=kx

soda water=k orange juice

2=2k

k=1

18=1 × orange juice

orange juice=18/1

orange juice=18 cups

4 0
3 years ago
Other questions:
  • How many tens make 40 + 50
    5·1 answer
  • A food packet is dropped from a helicopter and is modeled by the function f(x) = -16x2 + 14400. The graph below shows the height
    8·2 answers
  • Need Help in this math problem .
    6·2 answers
  • 3. -19-8 dind the sum or difference ​
    10·1 answer
  • To graph f(x) = 3(x - 1)^2, what would<br> you do to the graph of f(x) = x??
    14·1 answer
  • ∆JKL=∆QRS<br>what is m&lt;Q?<br>enter you answer In the box<br>​
    13·1 answer
  • What is 10 times as much as 24.735?
    15·1 answer
  • A biased dice is thrown.
    8·1 answer
  • Jason jumped 623 feet in a jumping contest. Yolanda jumped 434 feet. How much farther did Jason jump than Yolanda?
    14·2 answers
  • A teacher said that 68% would be the
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!