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
Gala2k [10]
3 years ago
12

Beverley has quarters and dimes in her pocket. She has 21 coins with a total value of $3.00. How many of each type of coin does

she have
Mathematics
1 answer:
forsale [732]3 years ago
8 0

Answer:

6 quarters and 15 dimes

Step-by-step explanation:

6 quarters = $1.50

15 dimes = $1.50

6 quarters + 15 dimes = $3.00

You might be interested in
Find the greatest solution for x+y when x^2+y^2 = 7, x^3+y^3=10
damaskus [11]

Answer:

4

Step-by-step explanation:

set

f(x,y)=x+y\\

constrain:

g(x,y)=x^2+y^2 = 7\\h(x,y)=x^3+y^3=10

Partial derivatives:

f_{x}=1\\f_{y} =1 \\g_{x}=2x \\g_{y}=2y\\h_{x}=3x^2 \\h_{y}=3y^2

Lagrange multiplier:

grad(f)=a*grad(g)+b*grad(h)\\

\left[\begin{array}{ccc}1\\1\end{array}\right]=a\left[\begin{array}{ccc}2x\\2y\end{array}\right]+b\left[\begin{array}{ccc}3x^2\\3y^2\end{array}\right]

4 equations:

1=2ax+3bx^2\\1=2ay+3by^2\\x^2+y^2=7\\x^3+y^3=10

By solving:

a=4/9\\b=-2/27\\x+y=4

Second mathod:

Solve for x^2+y^2 = 7, x^3+y^3=10 first:

x=\frac{1}{2} -\frac{\sqrt{13}}{2} \ or \ y=\frac{1}{2} +\frac{\sqrt{13}}{2} \\x=\frac{1}{2} +\frac{\sqrt{13}}{2} \ or \ y=\frac{1}{2} -\frac{\sqrt{13}}{2} \\x+y=-5\ or\ 1 \or\ 4

The maximum is 4

6 0
3 years ago
Can you ever have a function and a relation at the same time? Why or why not?
s2008m [1.1K]

Answer: If you think of the relationship between two quantities, you can think of this relationship in terms of an input/output machine. If there is only one output for every input, you have a function. If not, you have a relation. You can conclude that this set of ordered pairs does not represent a function

Step-by-step explanation:

Hope this helps :) good luck!!

6 0
3 years ago
750 tickets were sold for a game for a total of $1,500.00. if adult tickets sold for $2.50 and children's tickets sold for $1.50
Charra [1.4K]
1500$/750tickets=2$
(2.50$+1.50$)/2=4/2=2$ <span>weighted average
this mean 50 50
750/2=375
</span>375 adult tickets and 375 children's tickets
6 0
3 years ago
An 8 foot square floor is to be covered with square tiles measuring 8 inches on each side. If each tile
Mashcka [7]

Answer:

72

Step-by-step explanation:

There are 12 inches in a foot.

Therefore in 8 feet there are 96 inches

Therefore the square floor is 96 * 96.

Therefore the area of the square floor is 9216 inches squared.

Each tile is 8 inches by 8 inches meaning it has an area of 64 inches squared.

9216 / 64 = 144.

Therefore 144 tiles are needed to tile the floor

Since each tile is 50 cents, 144 * 0.5 = 72

Therefore it costs 72 dollars to tile the floor.

3 0
3 years ago
The diameter of a circle is 7 cm. Find its circumference in terms of pie
vagabundo [1.1K]

Answer:

7pi

Step-by-step explanation:

Circumference is pi * diameter. This means that the circumference is 7 pi

6 0
3 years ago
Other questions:
  • The temperature at noon is -4 degrees Celsius. The temperature at 6:00 pm -12 degrees Celsius. What is the difference between no
    5·1 answer
  • Can a triangle have more than one obtuse angle?
    13·2 answers
  • If the radius of a sphere doubles , then it’s volume increases by a factor of ___
    6·1 answer
  • PLEASE HELP!!!!!!!!!!!!! (15 points)
    6·2 answers
  • What is 100.006+ 23.45
    7·2 answers
  • The ratio of turkeys to glasses of milk is 3:1 is there or 25 glasses of milk how many cookie dough
    6·1 answer
  • Students at three elementary schools collected a total of 29,294 cans of food to donate to a local food bank. Students at Johnso
    11·1 answer
  • Graph g(x)=− 51 (x+5) ^2 − 2
    13·1 answer
  • Drag each tile to the correct box.
    8·2 answers
  • Find the base of an isosceles triangle whose area is 60 cm² and the length of one of its equal sides is 13 cm. ​
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!