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iren [92.7K]
3 years ago
12

Please helpstep by stepParentheses, Braces, and Brackets​

Mathematics
1 answer:
AURORKA [14]3 years ago
3 0

Answer:

sorry iuuytffsa at tfyui0

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<img src="https://tex.z-dn.net/?f=%5Csf%20HELP%21" id="TexFormula1" title="\sf HELP!" alt="\sf HELP!" align="absmiddle" class="l
ehidna [41]

Answer:

x=13

Step-by-step explanation:

Switch sides:

2x−9=17

Add 9 to both sides:

2x−9+9=17+9

Simplify

2x=26

Divide both sides by 2:

2x/2 =26/2

Simplify to get the result.

x=13

8 0
2 years ago
25 POINTS
Semenov [28]

If the slope of AB = CD and BC = AD it's a parallelogram:

Slope of AB = 6+1 / -9+5 = -7/4

CD = -2-5 / 3+1 = -74

These are equal.

BC = 5-6 / -1 +9 = -1/8

AD = -2 +1 / 3+5 = -1/8

These are also equal so it is a parallelogram.

Now to find if the diagonals are perpendicular find the slope of the perpensicular points:

AC = 5 +1 / -1 +5 = 6/4 = 3/2

BD = 6+2 / -9 -3 = 8/-12 = -2/3

Because BD is the reciprocal of AC, this means they are perpendicular.

And because AB is not perpendicular to AD ( AB and AD are not reciprocals) it is a rhombus.

5 0
3 years ago
If you multiply the sum of 546 and 1711 by zero, what will be your result?​
Tomtit [17]

Answer:

0

Step-by-step explanation:

any numbers multiply by zero always equals to zero

5 0
3 years ago
F(8)=x+2 solve for x
lorasvet [3.4K]

Answer:

f(x) = x + 2

f(8) = 8 + 2

f(8) = 10

3 0
2 years ago
The average survival time after diagnosis for a certain type of cancer on the standard treatment is two years. A medical researc
wolverine [178]

Answer:

The sample size is too small

Step-by-step explanation:

The answer is the last one: the sample size is too small. Since we only got 3 subjects to test, maybe one of them could live for a long time after the diagnosis of Cacer and that made the average survival time go up by a lot.

In order to obtain results with a significance level higher, you need a sample size of at least 20 subjects.

Now lets see why other options wouldnt be good answers:

  • For a small amount of subjects, it is unlikely to have errors in caculation
  • The sample size is given
  • We are not given information about the treatment and we dont even know if the subjects feel more confident with the new treatment. Also, if a Placebo effect works regularly, it shouldnt limit statistical sifgnificance
  • An increase in 2 years is huge in comparison with the previous survival time.

4 0
3 years ago
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