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4 years ago

Another day. Another question... :)

Mathematics

1 answer:

lutik1710 [3]4 years ago

3 0

im not sure but its 80 or 65

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Paul has 12 coins in his pocket, consisting entirely of dimes and quarters. If he has a total of 195 cents in coins, how many co

anyanavicka [17]

Let x be the number of dimes

and y be the number of quarters

Total number of coins = 12

So number of dimes + number of quarters = total number of coins

x + y = 12 ---------> equation 1

We know, 1 Quarter = 25 cents, 1 Dime = 10 cents, total cents = 196

y quarters = 25y cents , x dimes = 10x cents

x dimes + y quarters = 195 cents

10x + 25y = 195 -----------> equation 2

Now solve both equations

x + y =12, we solve for y by subtracting x on both sides

y = 12-x

Now substitute y in second equation

10x + 25(12-x) = 195

10x + 300 -25x = 195 (combine like terms)

-15x + 300 = 195 (subtract 300 on both sides)

-15x = -105 ( divide by -15)

x=7

y= 12-x

y=12-7 = 5

The number of dimes = 7

Number of quarters = 5

8 0

3 years ago

Simplify 30x-140-(x-4)

balu736 [363]

Answer:

x = 4.7

Step-by-step explanation:

30x - 140 -(x - 4)

Multiply the -1 into (x - 4)

30x - 140 - x + 4

Add/subtract

29x - 136 = 0

+136

$29x = 136$

$\frac{29x}{29} = \frac{136}{29}$

$x = 4.689655172413793$

8 0

4 years ago

Please help ASAP I don’t wanna fail this test!!

Verdich [7]

Answer:

Step-by-step explanation:

5 0

3 years ago

The perimeter of a rectangle must be no greater than 62 meters. The width must be 12

GREYUIT [131]

Answer:

xinloitoikogiaiduoc

Step-by-step explanti

6 0

3 years ago

<img src="https://tex.z-dn.net/?f=5%20-%203x%20%3D%2011" id="TexFormula1" title="5 - 3x = 11" alt="5 - 3x = 11" align="absmiddle

const2013 [10]

Hi there! :)

Answer:

x = -2

Step-by-step explanation:

5 - 3x = 11

Subtract "5" from each side of the equation → 11 - 5 = 6

-3x = 6

Divide each side of the equation by "-3" → 6 ÷ -3 = -2

x = -2

There you go! I really hope this helped, if there's anything just let me know! :)

5 0

3 years ago