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Nezavi [6.7K]
3 years ago
8

Can u answer this please?thanks! ☺️perform the indicated operations and simplify.​

Mathematics
2 answers:
tia_tia [17]3 years ago
6 0

Answer:

13)1

14)6

15)t

16)1

17)1/9

18)2/b-3

19)k-16/30

20)6m+6/m to the power-6m

Step-by-step explanation:

Have a nice day

kkurt [141]3 years ago
5 0
13. 1
14. 6
15. (t+1)
16. 1
17. 1/9
18. 2/b-3
19. k-16/30
20. 6m+6/m^2 - 6m
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Division story of 56 divided by ? Equals 8
TiliK225 [7]
56÷7=8 that is the answer have a nice day
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3 years ago
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4. IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. In a
borishaifa [10]

675 people will have score between 85 and 120

Step-by-step explanation:

Given

Mean = 100

SD = 15

If we have to find percentage of score between two values we have to find the z-score for both values and then area under the curve for both values

z-score is given by:

for a value x:

z-score = \frac{x-mean}{SD}

So,

For 85:

z-score = z_1 = \frac{85-mean}{SD}\\ = \frac{85-100}{15}\\=\frac{-15}{15}\\=-1

z-score = z_2 = \frac{120-mean}{SD}\\ = \frac{120-100}{15}\\=\frac{20}{15}\\=1.3333

Now we have to find the area under the curve for both values of z-score. z-score tables are used for this purpose.

So,

For z1 : 0.1587

For z2: 0.9082

The area between z11 and z2:

z_2-z_1 = 0.9082-0.1587=0.7495

So the probability of score between 85 and 120 is 0.7495

As the sample is of 900 people, the people with scores between 85 and 120 will be:

900*0.7495 = 674.55 people

Rounding off to nearest whole number

675 people will have score between 85 and 120

Keywords: Probability, SD

Learn more about probability at:

  • brainly.com/question/10978510
  • brainly.com/question/11007026

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4 0
4 years ago
HELP SMART PPL!!!!!!!!!!!!!!!!!
mezya [45]

Answer:

33.75

Step-by-step explanation:

45x0.75=33.75

3 0
3 years ago
I need help i'm about to cry lol
grigory [225]

Answer and Step-by-step explanation:

The answer is the last answer choice.

g(x) = -(x + 2)^2 + 1

We don't even have to look at the numbers to tell that this is the correct answer. We look at what is being placed there.

The equation for a transformed function is:

f(x) = a(x-h)^2 + k

a determines the scale of the graph and whether the graph opens up or down.

h determines whether the graph shifts left or right.

k determines whether the graph shifts up or down.

We see that there is a -1 for a, which means the graph will be facing downwards. We see a 2 for where h is, but it really is a -2, and when it becomes a positive after simplifying, the graph will shift to the left.

k is a positive 1, so the graph will be shifted up 1 unit.

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5 0
3 years ago
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Find the distance between w=1+2i and z=3-i
AlladinOne [14]

Answer:

The distance between w=1+2i and z=3-i is 3.61

Step-by-step explanation:

We need to find the distance between w=1+2i and z=3-i

The formula used is: Distance=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}

We have x_1=1, y_1=2, x_2=3, y_2=1

We will use only real numbers and not i for calculating distance.

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So, The distance between w=1+2i and z=3-i is 3.61

3 0
3 years ago
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