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
professor190 [17]
3 years ago
15

Peggy had 4 times as many quarters as nickels. She had $2.10 in all. How many nickes and how many qurters did she have ?

Mathematics
1 answer:
Delicious77 [7]3 years ago
8 0
A) 4*N -Q = 0
B) .05N + .25Q = 2.10

Multiply B) by 4
B) .2N + Q = 8.40 Adding this to A)
A) 4*N -Q = 0
4.2N = 8.40
N = 2 Nickels
Q = 8 Quarters


You might be interested in
A plane at 3,800 feet is descending at a rate of 120 feet per minute, and a plane at 520 feet is climbing at a rate of 40 feet p
Llana [10]

so the basic formula for this d = rt

where d is the distance , r is the speed and t is time

 

3800 – 120t = 520 + 40t ( this is the altitude of each plane are equal)

Solve for t

T = 20.5 min time it takes for the planes to be at the same altitude

 

3800 – 120(20.5) = 1340 ft

<span> </span>

5 0
3 years ago
Suzanna walked two over seven of a mile in two over five of an hour. What is her unit rate in miles per hour? two sevenths over
Lorico [155]

Answer:

5/7 mile per hour.

Step-by-step explanation:

Divide 2/7 by 2/5 to get to 0.714. After that, convert the decimal to a fraction and you get your answer.



Hope this helped!!! <3 :)

5 0
3 years ago
PLEASE HELP ILL MARK BRAINLIEST
viktelen [127]

Answer:

You would want to do the square root of 361 which is 19

Hope This Helps!

ps. no, I'm not stalking u I just clicked on the next question from your last one.

5 0
2 years ago
Read 2 more answers
A window is 21 inches wide, and its perimeter is 112 inches. What is the length of the window?
Kazeer [188]

Answer:

The length of the window is 35 inches.  

Step-by-step explanation:

Perimeter of an object can be found using the general formula:  P = 2W + 2L, where P = perimeter, W = width and L= length.  Since both the width and perimeter of the window are given, we can plug these values into the formula to solve for the missing variable 'L':  112 = 2(21) + 2L, or 112 = 42 + 2L.  We can then use inverse (opposite) operations to isolate the variable and solve.  Whatever we do to one side of the equation, we do to the other.  We will start by subtracting 42 from each side:  112 - 42 = 42 - 42 + 2L or 70 = 2L.  Next, we divide both sides by 2 to solve for L:  70/2 = 2L/2 or L = 35.  So, the final length of the window is 35 inches.  

8 0
3 years ago
Describe the dimensions of two different prisms that each have a volume is 2,400 cubic centimeters
Phantasy [73]
One prism with a volume of 2400 might have a rectangular base with a length of 4 and a width of 5, as well as a height of 120. 

V = l x w x h
V = 4  x 5 x 120
V = 2400

This prism would essentially look like a really tall rectangle, since the height is such a large number. I wouldn't accurately represent the units on graph paper, if I were you. Just label the sides with the numbers I gave you.

Another prism with a volume of 2400 might be a rectangular prism with a length of 8, a width of 10, and a height of 30. 

V = l x w x h
V= 8 x 10 x 30
V = 2400

This would also be a tall rectangle, although it isn't as tall. Keep in mind that l x w x h is only the volume formula for a rectangular prism. I only used rectangular prisms because they would be the easiest for this example. A triangular prism has a different volume formula.
3 0
3 years ago
Other questions:
  • Find approximate solution for the equation in the interval -π tan x= 2 csc x
    9·1 answer
  • What is the slope-intercept form of the equation of the line through the
    10·1 answer
  • Eight and one fifth plus four and two fifths plus three and three tenths<br>​
    10·2 answers
  • What is half of 3 5/10?
    12·1 answer
  • Emily gave 20% of her buttons to Jake. How many total buttons did Emily start with if she gave 15 buttons to Jake?
    15·1 answer
  • Find f(3) given f(x)=4^x
    9·1 answer
  • Triangle KLM ~ triangle KCD are similar. Solve for x.​
    13·1 answer
  • What is the product? 3x(-6 -11 -14 -9)
    7·1 answer
  • Help plz i will rate
    11·2 answers
  • Which representation shows y as a function of x?
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!