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3 years ago

8

Shailyn solved 618 math problems in one week. Karla solved 549 math problems. How many more math problems did shailyn solve than

Karla ?

1 answer:

Vaselesa [24]3 years ago

4 0

The answer is 69.

618-549=69

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PLZZZZZZZZZZZZZZZ HELP ME FAST

alekssr [168]

So it's actually 0.36363636... with the 36 repeating, right?

<span>Here's a technique for converting repeating decimals to fractions: </span>

<span>N = 0.3636363636... </span>
<span>100N = 36.36363636... </span>

<span>This means 100N - N = (36.363636...) - (0.36363636...). This simplifies to 99N = 36, because the "0.36363636..." parts of both numbers on the right cancel each other out. </span>

<span>Solving this for N gives </span>
<span>N = 36/99, or 4/11 </span>

<span>If you take a calculator (or use long division) and divide 4 by 11, you'll see that it's 0.36363636...</span>

8 0

3 years ago

5x+20y=4<br> x=-4y+1<br><br> Solve for x/y

Andrews [41]

Hi there!

Looks like a lot of work is going on here.

Let's start by solving this equation for the x.

$5x + 20y = 4$

Step 1) Add -20y to both sides.

$5x + 20y + - 20y = 4 - 20y 5x = -20y + 4$

Step 2) Divide both sides by 5.

$\frac{5x}{5} = \frac{-20y + 4}{5}$

$x = -4y + \frac{4}{5}$

Final Answer:

$x = -4y + \frac{4}{5}$

Now, let's solve for y.

Step 1) Add -5x to both sides.

$5x + 20y + - 5x = 4 + - 5x 20y = -5x + 4$

Step 2) Divide both sides by 20.

$\frac{20y}{20} = \frac{-5x + 4}{20}$

$y = \frac{-1}{4} x + \frac{1}{5}$

Final Answer:

$y = \frac{-1}{4} x + \frac{1}{5}$

Hope this helps! :D

Hint - When you have two variables in an equation, and you want to solve for one, the other will end up in your answer. :)

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3 years ago

Solve using the quadratic formula

Svetradugi [14.3K]

The answers are -16 and 9. Hopefully this helps :D

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3 years ago

A pizza shop charges $2.00 for a slice that is one-eighth of a pizza and $3.00 for a slice that is one-fourth of a pizza. One da

Lelu [443]

Answer:

Step-by-step explanation:

6x8=48 slices to be sold in 8ths.

2x48= $96

6x4= 24 slices to be sold in 4ths.

24x3=$72

96-72= $24

They will make 24 more dollars if they sell slices in eighths.

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3 years ago

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Diano4ka-milaya [45]

Answer: Multiplying 3x and -x we obtain A= -3x^2

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3 years ago