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Verdich [7]
3 years ago
8

A box contains 87 coins, only Dimes and nickels. The amount of money I the box is $5.45. How many dimes and how many nickels are

in the box?
Mathematics
2 answers:
Tamiku [17]3 years ago
5 0
There are 65 nickels and 22 dimes in the box.
Slav-nsk [51]3 years ago
3 0
Write the situation as a simultaneous eqution: 
x+y=87
10x+5y=545

Now solve for y by multiplying the whole of the first equation by the coefficient of x:
10x+10y=870
10x+5y=545

5y=325
y=65 nickels in the box
x+y=87
x=22 dimes in the box
To prove this is correct, we do (10 x 22)+(5 x 65)=545 cents ($5.45)
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Please help I really need help . I will for sure reward you as brainly . Thank you in advance
nirvana33 [79]
The first one is Corresponding Angles
The second one is Alternate interior angles
The third one is Co-interior angles
The fourth one is Vertical angles
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Hope it helps

8 0
3 years ago
Use cylindrical coordinates. Find the volume of the solid that lies within both the cylinder x2 y2
Sedaia [141]

Answer:

hello your question is incomplete here is the complete question

Use cylindrical coordinates Find the volume of the solid that lies within both the cylinder x^2 + y^2=16 and the sphere x^2 + y^2 + Z^2= 81

Answer : \frac{4 \pi }{3} [729 - 65\sqrt{65} ]

Step-by-step explanation:

The given data

cylinder  = x^2 + y^2 = 16

sphere = x^2 + y^2 +z^2 = 81

from the given data the solid is symmetric around the xy plane hence we will calculate half the solid volume above the plane then  multiply the sesult by 2

Note : we are restricting our attention to the cylinder  x^2 + y^2 = 16 and also finding the volume inside the sphere which gives bound on the z-coordinate as well

the r parameter goes from 0 to 4

ATTACHED IS THE REMAINING PART OF THE SOLUTION

showing the integration

5 0
4 years ago
You are selling lemonade for $1.50, a bag of kettle corn for $3, and a hot dog for $2.50 at a fair. Write and simplify an expres
Mkey [24]

Answer:

P(1.5 + 3 + 2.5)

Step-by-step explanation:

4 0
3 years ago
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irga5000 [103]

Answer:

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Step-by-step explanation:

4 0
3 years ago
What is the slope of the line that passes through points (1,7),(10,1)
astra-53 [7]
Answer:
slope = -2/3

Explanation:
Slope of line can be calculated using the following formula:
slope = \frac{y2-y1}{x2-x1}

We are given:
point (1,7) representing (x1,y1)
point (10,1) representing (x2,y2)

Substitute with the givens in the above formula to get the slope as follows:
slope = \frac{1-7}{10-1} = -2/3

Hope this helps :)
7 0
3 years ago
Read 2 more answers
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