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tatyana61 [14]
3 years ago
7

Please help! I really need it

Mathematics
1 answer:
nirvana33 [79]3 years ago
4 0
Add all sides.
5x+2+3x+8+4x-1
Combine like terms
12x+9
Subtract nine to get it on the other side of the equal sign
12x= -9
Divide by twelve
x=-9/12
Simplify
x=-3/4
Plug in x.
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15:3 is the only equivalent ratio to 20:4.

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3 years ago
If you flipped a fair coin 18 times, about how many times would you expect heads to appear? HELP ME PLEASE!!!!!!!
Andrei [34K]

Answer:

9 or 3.8x10^-6

Step-by-step explanation:

By flipping a coin you'd look at how many times a head could appear (1/2) and multiply that by the 18 times.

Another explanation:

I'm not sure on this but would you raise 1/2 to the 18th power?

4 0
3 years ago
write the equation of the line perpendicular to y= 5/2x+2 that passes through the point (-7,9). Type an answer using slope-inter
lianna [129]

Answer:

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y + 7 = 4/5 ( x - 9)

Step-by-step explanation:

those are

the answers

7 0
2 years ago
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Contact [7]

Answer:

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Step-by-step explanation:

The first step is isolating the expression within the absolute value bars. The first thing we can do is subtract both sides by 8. If we do that, we get -2|4-5y| = -4. Now, to completely isolate the absolute value, we would have to divide by -2. This yields |4 - 5y| = 2. Finally, we can remove the absolute value bars. However, to do this, we need to first understand what an absolute value bar does to an equation. Lets say that |x| = 2. Absolute value describes the DISTANCE of some quantity from 0 (on the number line). Therefore, x (which is inside the absolute value bars) can be either positive or negative 2 (they are BOTH two units away from 0). Similarly, in this case, (4 - 5y) can either be 2 or -2 (because the absolute value of both is 2). Now we have two possible solutions to solve for:

4 - 5y = 2 OR 4 - 5y = -2

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4 0
2 years ago
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Naily [24]

Answer:

Step-by-step explanation:

all real numbers that are greater than -22 : x >  -22

interval notation: ]- 22 ; + ∞  [

3 0
3 years ago
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