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3 years ago

11

Liz flips a coin 80 times. The coin lands heads up 32 times and tails up 48 times. the theoretical probability of the coin landi

ng heads up is

1 answer:

vredina [299]3 years ago

5 0

Answer:

1/2 since there's always a fifty-fifty chance.

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Solve the equation by factoring,2x^2=28-x

valkas [14]

Answer:x = -4

x = 7/2

Or

x= 3.500

Step-by-step explanation:

Pls mark brainliest

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3 years ago

-x+2y=9<br> -7x-2y=-1 <br> Solve each system by elimination

g100num [7]

X - 2y = - 9
7x + 2y = 1

x - 2y = - 9
(+)
7x + 2y = 1
___________
8x = - 8

x = - 1

- 1 - 2y = - 9
2y = 8
y = 4

i am a mathematics teacher. if anything to ask please pm me

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3 years ago

2. A machine burns m gallons of oil each hour on weekends and ngallons each hour on weekdays. How many gallons of oil are burned

Lynna [10]

The question says the machine uses up m gallons of oil each hour on weekends.

This means that if the machine works for 24 hours each day, it implies that:

$\text{Total amount of oil used up in a day = 24}\times m=24m$

There are only two days on weekends i.e. Saturday and Sunday.

This means that if the amount of oil used in 1 day in the weekend is 24m, then we can say:

Saturday: oil used is 24m

Sunday: oil used is 24m

Total oil used during the weekend is:

$24m+24m=48m$

4 0

1 year ago

Here’s another way to think about the number line model for 2 – (-3): if we were adding 2 + (-3), we’d first move two units to t

CaHeK987 [17]

Subtracting -9 from any number is the same as

<u></u>

<u>A</u>

<u>subtracting 9 from that number.</u>

7 0

3 years ago

5+<img src="https://tex.z-dn.net/?f=%5Csqrt%7B16x%5E%7B2%7D%20-37x-2%20%7D%3D4x" id="TexFormula1" title="\sqrt{16x^{2} -37x-2 }=

bonufazy [111]

Answer:

Step-by-step explanation:

$\sqrt{16x^2-37x-2} =4x-5\\squaring~ both~sides\\16x^2-37x-2=16x^2-40x+25 ~[(a-b)^2=a^2-2ab+b^2]\\16x^2-37x-2-16x^2+40x-25=0\\3x-27=0\\3(x-9)=0\\x-9=0\\x=9$

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3 years ago