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
lara31 [8.8K]
3 years ago
14

Louis has three more quaters than dimes in his pocket, for a total of $1.80 . Which equation could used to detemine the number o

f dimes, x in this pocket
Mathematics
1 answer:
antoniya [11.8K]3 years ago
8 0

Answer:

3+d=q and 0.10d+0.25q=1.80

There are 3 dimes and 6 quarters.

Step-by-step explanation:

This situation has two unknowns - the total number of dimes and the total number of quarters. Because we have two unknowns, we will write a system of equations with two equations using the two unknowns.  

We know there are three more quarters than dimes. We write that as 3+d=q.

We also know the total cost and the value of each coin. We write 0.10d+0.25q=1.80.

We substitute 3+d for q in the second equation.

0.10d+0.25(3+d)=1.80

0.10d+0.75+0.25d=1.80

0.35d+0.75=1.80

We isolate the variable by subtracting 0.75 across the equal sign and then dividing by the coefficient of d.

0.35d=1.05

d=3

There are 3 dimes.

You might be interested in
Gio’s soccer team is having a car wash to raise money for new uniforms. C stands for how many cars are washed and D stands for h
umka2103 [35]

i will help you if you help me.

7 0
3 years ago
Read 2 more answers
What is 5/6 as a percent rounded to the nearest hundredth
siniylev [52]
To find the percent, we first find the decimal.

To do that we divide 5 / 6, which gives us approximately 0.83333, now we multiply it by 100 since percentages are parts of 100.

0.83333 * 100 = 83.33%
6 0
3 years ago
How could you estimate the difference of 6.52 and 6.520
borishaifa [10]
They are equal because no matter how many zeroes are the decimal point and all the numbers so  6.900000000000000 and 6.9 are equal.
3 0
3 years ago
Read 2 more answers
a line passes through the point (2,-3) and is perpendicular to the line y=-3 find equation for this line
melamori03 [73]

Answer:

x=2

Step-by-step explanation:

y=-3 is a horizontal line so the one that is perpendicular to it is supposed to be vertical

5 0
3 years ago
Y=-1/2x +7
yarga [219]

Answer:

B; (2,-4)

Step-by-step explanation:

The general equation of a straight line is;

y = mx + b

where m is the slope and b is the y-intercept

So from the question, when we look at the given equation, its slope is -1/2

mathematically, when two lines are perpendicular, the product of their slopes is -1

thus;

m1 * m2 = -1

m2 * -1/2 = -1

-m2 = -2

m2 = 2

The general equation form is;

y-y1 = m(x-x1)

where (x1,y1) = (4,0)

y-0 = 2(x-4)

y = 2x - 8

So, now we look at the point that will work for this equation

For the line that will work, if we substitute its x-value, we get the y-value

Let us take a look at option B

y = 2(2) -8 = 4-8 = -4

we can see that (2,-4) works

4 0
3 years ago
Other questions:
  • As a valet at the mall, Davis works 7-hour shifts. He earns $7 per hour and keeps 60% of his tip money. How much does Davis need
    8·1 answer
  • I really need this plzzzzzz
    7·1 answer
  • you are trying to increase your monthly savings to buy a used car your boss allows you to work one hour of overtime at time and
    14·1 answer
  • In the figure, AB = 15.8, 11.9 10.2, 8.4 inches and AC = 18.7, 15.5, 14.3, 13.1 inches.
    5·1 answer
  • 49 can be expressed as the sum of first ------------ consecutive odd numbers<br> need fast
    12·1 answer
  • What is the fraction form of the following decimal expansion?0.1253
    7·1 answer
  • Two trains leave stations 238 miles apart at the same time and travel toward each other. One train travels at 95 miles per hour
    6·1 answer
  • Is it true that (x^2-3x+2)/(x-1) = x – 2, for all values of x? Justify your answer.
    13·2 answers
  • Please help! 30 points!
    7·1 answer
  • Which inequality is graphed on the grid?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!