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
scoray [572]
3 years ago
8

Simita has 25 coins, consisting of 10c and 5c, which total $2.25. how many of each does she have?​

Mathematics
1 answer:
Ilya [14]3 years ago
7 0

Answer:

10c = 20

5c = 5

Step-by-step explanation:

Let x be the number of 10c coins; let y be the number of 5c coins. The total is $2.25, so the amount of 10c and 5c coins will add to that. Simita has 25 coins, so x and y, the number of coins, will have to add to 25. Hence, solve the simultaneous equation.

10x + 5y = 225 (1) - times by 0

x + y = 25 (2) - times by 5

10x + 5y = 225 (1)

5x + 5y = 125 (2)

Then, take equation 2 away from equation 1.

5x = 100

x = 20

Substitute x back into the original equation.

x + y = 25

20 + y = 25

y = 5

You might be interested in
Amanda and her group of friends spent a total of $35.50 on 7 hot dogs and 6 cheese burgers. Greg and his group of friends spent
Alexeev081 [22]
7h + 6b = 35.50
5h + 6b = 30.50

The difference between the 2 totals spent is $5, and there were the same number of burgers, but 2 fewer hotdogs. So $5/2 = $2.50, the cost of a hot dog. Substitute that into the equations to solve for burgers (b)

5(2.50) + 6b = 30.50
12.50 + 6b = 30.50
6b = 18
b = 3

Check the work:
7(2.50) + 6(3) =
17.50 + 18 = 35.50
8 0
3 years ago
Which best describes how the y-values are increasing over each interval? Subtract 10 over each interval. Multiply by 2 over each
Gnom [1K]

Answer:

Add 3 over each interval

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Brainiest to whoever right
Anna35 [415]

Answer:

since M lies between point A and B , we came to know that,

M(4,6) =(x,y)

A(-2,-1)=(x1 ,y1)

B( _, _ )=(x2,y2)

Now using mid point formula,

x=x1×x2÷2 y=y1+y2÷2

so, point B is (10,13)

6 0
2 years ago
Rationalize the denominator in the expression. <br><img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B4%7D%7B%5Csqrt%7B2%7D%20%7D%20
Dovator [93]

Answer:

2\sqrt{2}

Step-by-step explanation:

See the photo for the steps. :)

7 0
3 years ago
Which autocad command can we use to quickly calculate the area and perimeter of a closed region defined by a polyline?
polet [3.4K]

The answer is: The Area command.

The explanation is shown below:

1. The Area command is a very useful command in AutoCad, and you can use it to calculate  the area and the perimeter of a closed region draw with a polyline.

2. To use this command, you only need to type AREA and press the enter button. Then, you must select the points of the closed region and press enter again. Once you do this, the software will show you the perimeter and the area.

4 0
3 years ago
Other questions:
  • A questionnaire provides 54 yes, 33 no, and 33 no-opinion answers. in the construction of a pie chart, how many degrees would be
    14·1 answer
  • Rewrite using scientific notation: 0.003
    12·1 answer
  • I need help. Please answer! ✨✨✨
    11·1 answer
  • A scientist is investigating the effects of salinity on fish development in the Atlantic Ocean. He places fertilized fish eggs i
    15·1 answer
  • Answer A B and C pls
    14·2 answers
  • Please help again! Same thing!
    15·1 answer
  • 2(3x +5) = 5(2x -4) -4x
    10·1 answer
  • Can anyone please help anyone bro
    13·1 answer
  • Logan can make $50 per pool to clean pools during the summer to earn money. He did, however, need to
    14·1 answer
  • What is the branch of mathematics developed by isaac newton called today?.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!