All categories

3 years ago

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

You might be interested in

Division story of 56 divided by ? Equals 8

TiliK225 [7]

56÷7=8 that is the answer have a nice day

3 0

3 years ago

Read 2 more answers

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:

#LearnwithBrainly

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.

Thus, the answer is the last answer choice.

#teamtrees #PAW (Plant And Water)

5 0

3 years ago

Read 2 more answers

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.

Putting values and finding distance

$Distance=\sqrt{(x_1-x_2)^2+(y_1-y_2)^2}\\Distance=\sqrt{(1-3)^2+(-1-2)^2} \\Distance=\sqrt{(-2)^2+(-3)^2} \\Distance=\sqrt{4+9} \\Distance=\sqrt{13}\\Distance=3.61$

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

3 0

3 years ago

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

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