Sally has seven times as many dimes as nickels. how many nickels does she have?

their value is $3.00.

4 nickels
7 nickels
28 nickels

A) 4 nickels

Step-by-step explanation:

Given:Sally has seven times as many dimes as nickels.

Let's take "x" be the number of nickels and "y" be the number of dimes.

We know that a dime represents 0.10 cents and a nickel represents .05 cents

Sally has seven times as many dimes as nickels.

y = 7 x (1)

0.10 x + .05 y = 3

Multiply by 100 on both sides, we get

10y + 5x = 300 (2)

Now we have to solve these two equations.

Now plug y = 7x in the second equation, we get

10(7x) + 5x = 300

70x + 5x = 300

75x = 300

x = 300/75

x = 4

Now plug x = 4 in y = 7x, we get

y = 7×4 = 28

Here x represents the number nickles.

Sally have 4 nickels.

step-by-step explanation:

x^2 -12x + 36 + y^2 = 36

x^2 + y^2 = 12x

r^2 = 12rcos(theta)

r = 12 cos(theta)

22.83 repeating

step-by-step explanation:

137 ÷ 6 is 22.8333333 therefore we understand that 3 is repeating.

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