A piggy bank contains an equal number of pennies, nickels, dimes, and quarters. If the total amount of money in the piggy bank is $7.79, find the number of each type of coin

Answers

Answer 1

Answer:

7.79 = .01x + .05x + .10x + .25x =
7.79 = .41x
.41 = .41
x= 19

Answer 2

Answer: $7.79 = p number of pennies worth $.01 each, n number of nickels worth $.05 each, d number of dimes worth $.10 each, and q number of quarters worth $.25 each. p = n = d = q
Algebraically, this is written:
7.79 = .01p + .05n + .10d + .25q
Since there is the same number of each type of coin, the variables are all equal to each other. This means that they can all be referred to as 'x'.
7.79 = .01x + .05x + .10x + .25x = .41x
7.79 = .41x
.41 = .41
19 = x

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Please hurry need it asap

Answers

Answer:

I think its B

Step-by-step explanation:

Answer:

use math w ay .co m its helps

Step-by-step explanation:

What is the density of the brown sugar if an 8cm3 block of brown sugar is 12.9 g

Answers

the answer is 1.6125 g/cm3

Give the first four terms of a geometric sequence having a1=18 and r = 2.

Answers

Hello,

$a_(1)=9*2=18$
$a_(2)=9*2^(2)=36$
$a_(3)=9*2^(3)=72$
$a_(4)=9*2^(4)=144$

$a_(n)=9*2^(n)$

Solve the equation 3x+6y=18 for x

Answers

3x+6y=18
subtract 6y from both sides
3x=18-6y
divide by 3
x=6-2y

Hi there!

When you answer a math problem with 2 variables, you have to make sure the other is in your answer. :)

Solve for x -

Step 1) Add -6y to both sides.

3x + 6y + -6y = 18 + -6y

3x = -6y + 18

Step 2) Divide both sides by 3.

3x/3 = -6y + 18/3

x = -2y + 6

Final Answer -

x = -2y + 6

Hope this helps!

If you need anything else, send me a message! I'd be happy to help! :D

The cost of stainless steel tubing varies jointly as the length and the diameter of the tubing. If a 5 foot length with diameter 2 inches costs $48.00 , how much will a 19 foot length with 3 inches diameter cost?

Answers

Answer:

$273.60

Step-by-step explanation:

The cost of stainless steel tubing varies jointly as the length and the diameter of the tubing.

i.e $C\propto L\cdot D$

i.e $C=k\cdot L\cdot D$

A 5 foot or 60 inches length with diameter 2 inches costs $48.00, so

$\Rightarrow 48=k* 60* 2$

$\Rightarrow k=(48)/(60* 2)=0.4$

Now the equation becomes,

$C=0.4\cdot L\cdot D$

So the cost of a 19 foot or 228 inches length with 3 inches diameter is,

$C=0.4* 228* 3=\$273.60$

The new number, 200, is 400 less than the original number. What is the approximate percent change

Answers

first, what was the original number?

it was 200+400=1000!

and when we want to know the change in percent, we divide the "new" number over the "original" number: and we'll know that percentage of the original the new number is!:

$(200)/(1000) *100%= (2)/(10) *100%=(200)/(10) %=20%.$

so the percent change was 80 %: the original number was reduced by (100-20)=80 %

The answer is 66%. Sorry if it is wrong.

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