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hichkok12 [17]
4 years ago
15

You play video games online. When you sign up with the game site, you get 200 points. You earn 20 more points for each hour that

you play. How many hours do you have to play to get to 500 points?
Mathematics
1 answer:
uranmaximum [27]4 years ago
3 0

Hey there! The answer is 30 hours!


Work: 500 - 200 = 300

 15 x 20 = 300

200 + 300 = 500

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4 Write<br> 4<br> as a percentage<br> Pls help me i need someone to explain it to me
kicyunya [14]

Answer:

Yeah! Well 4 as a percentage would be 0.04 because 4% is 0.04.

Step-by-step explanation:

When you multiply a number times 100 (100%) you move the decimal place 2 places to the <em>left</em>. When you multiply a number times 10 you move the decimal place 1 place to the <em>left.</em> Just think that 100 has 2 0's in it so move that much to the <em>left.</em>

Hope this helps!

4 0
3 years ago
Sara and Jenny can both do flips in the air. The ratio of the number of flips Sara can do to the number of flips Jenny can do is
Snowcat [4.5K]

Wow! I never had problems this hard in middle school!

But you can do it!

First, we need to figure the number of flips Sara can do based on Jenny's.

Jenny = 120 and Sara - 120 x 3/8 (because she is only 3/8 of Sara's)

Calculate 120 x 3/8 = 45 flips

Now we know that Sara increased her amount of flips by 3 (45 +3 = 48)

And we know that Jenny decreased hers by 12 (120 - 12 = 108)

So now we have a ratio of 48:108, but we need to simplify that with factoring.

I am going to divide first by 2.

24:54

Then 2 again...

12:27

How about 3?

4:9

I think that is as far as we can go.

Sara is now doing 4 out of every 9 that Jenny does.

Check it!

108 (Jenny) x 4/9 = 48 (Sara) Yes! It checks.

8 0
4 years ago
2x^2 - 5x + 7 = 0. <br> Find the discriminant. <br>Describe the roots and explain your reasoning.
erma4kov [3.2K]
The discriminant of
ax^2+b+c=0 is
b^2-4ac

when the discriminant is
less than 0, then there are no real roots
equal to 0, then there is 1 real root
greater than 0, then there are 2 real roots


so

2x^2-5x+7=0
a=2
b=-5
c=7

discriminat=(-5)^2-4(2)(7)=25-28=-3
-3<0
no real roots
5 0
4 years ago
An inequality is like an equation, but instead of an equal sign (=) it has one of these signs: ______________, _______________ ,
seraphim [82]

Answer:

An inequality sign is like an equal sign with a line through it

so, like, if you put = and / together

5 0
3 years ago
Read 2 more answers
Directions
valina [46]

Answer:

Huh I'm srry I'm so srry but in confused

Step-by-step explanation:

like really bad XD pls dont be mad I'm just saying :D

3 0
3 years ago
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