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
OleMash [197]
3 years ago
12

Every evening Jenna empties her pockets and puts her change in a jar. At the end of the week she counts her money. One week she

had 38 coins, all of them dimes and quarters. When she added them up, she had a total of $6.95. how many coins did jenna have
Mathematics
1 answer:
Usimov [2.4K]3 years ago
3 0
D + q = 38......d = 38 - q
0.10d + 0.25q = 6.95

0.10(38 - q) + 0.25q = 6.95
3.80 - 0.10q + 0.25q = 6.95
-0.10q + 0.25q = 6.95 - 3.80
0.15q = 3.15
q = 3.15 / 0.15
q = 21 <== number of quarters

d + q = 38
d + 21 = 38
d = 38 - 21
d = 17 <== number of dimes



You might be interested in
The sum of two numbers is 54. The smaller number is 18 less than the larger number. What are the numbers?
igomit [66]

Answer:

The larger number is 37.  This makes the smaller number 56 - 37, which is 19.

Step-by-step explanation:

 

The first step is to pick variables for the two numbers.  Lets call the smaller number x and the larger number y.

Since the sum of the two numbers is 56, this means that x + y = 56.  Let's call this equation 1 and save it for later.

 

The next sentence says:

The smaller number is 18 less than the larger number.  So, 18 less than the larger number would be y - 18.  So, the smaller number must be equal to this, so

 

x = y - 18

 

Replace the x in equation 1 with y - 18

 

x + y = 56

(y-18) + y = 56   (replace x with y-18)

2y - 18 = 56        (add the y's)

2y = 74               (add 18 to both sides)

y = 37                 (divide both sides by 2)

 

So, the larger number is 37.  This makes the smaller number 56 - 37, which is 19.

 

Hope this helps!!  :)

8 0
2 years ago
Charlie runs at a speed of 3 yd./s about how many miles per hour does Charlie run
vagabundo [1.1K]
1 hour = 3600 seconds

3 × 3600 = 10800

<span>10800 yards per hour
</span>
1 mile = 1760 yards

10800 ÷ 1760 =  6.13

6.13 miles per hour
4 0
3 years ago
Peytons car used 6 gallons to travel 192 miles how many gallons of gas would she need t I travel 480 miles
ELEN [110]

Answer:

15 gallons

Step-by-step explanation:

if 6gallons = 192 miles

then x gallons 480 miles

x = (6*480)/192

x = 2880/192

x = 15 gallons

5 0
3 years ago
What to numbers can go into 72 and 45
ratelena [41]

Answer:

3 and 9

Step-by-step explanation:

3 * 24 = 72

9 * 8 = 72

3 * 15 = 45

9 * 5 = 45

8 0
3 years ago
Read 2 more answers
Help!!!!! Meee!!!! Please
ch4aika [34]

Answer:

A, D, E

Step-by-step explanation:

Time is a function of temperature because there are no points where the x-value has more than one y-value.

There are two points where the temperature reaches 74 degrees.

Between 5 and 9 the temperature did not change.

6 0
3 years ago
Read 2 more answers
Other questions:
  • Write the algebraic expression that is the model of 3 boxes labeled x, 2 boxes labeled y and 4 boxes without a label
    6·1 answer
  • Solve for f.<br><br> –7f − 9 = 9 − 4f<br><br> f =
    5·1 answer
  • Help please solving this multiplication not sure.
    12·2 answers
  • What is the algebraic expression for , a number b divided by 36
    11·1 answer
  • A. Use your calculator to work out the exact value of 13822 x 623/ 14
    12·1 answer
  • You have just administered 3 tablets with a dose strength of 1.5mg tablets. What is the total dosage?
    9·2 answers
  • This season a softball player scores 6 runs more than three times the number of runs she bats in (also known as RBIs). She score
    15·2 answers
  • A test had a mean of 72% and a standard deviation of 8 what is the z-score for a test score of 85?
    12·1 answer
  • Find the value of x. Then find the angle measures of the polygon.<br><br> x=_ <br><br> Question 2
    10·2 answers
  • Magazine:
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!