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Step2247 [10]
3 years ago
7

Use distributive property to rewrite each algebraic expression: 15(2+r)

Mathematics
1 answer:
ira [324]3 years ago
8 0

Answer:

15 x 2 + 15 x r

Step-by-step explanation:

I hope this helps and hope u have an Amazing day!!

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Given that f(x)=(k x)/(2x 1)and that f(-3)=2, find the value of k
makvit [3.9K]

Answer:

Kindly upload a better version

Step-by-step explanation:

3 0
3 years ago
The sum of a positive number and 22 is 455 times the reciprocal of the number find the number
dalvyx [7]

Answer:

13

Step-by-step explanation:

Let the number be x.

ATQ x+22=455/x. x^2+22x=455. x=-35 or 13. Since x is positive, x=13

3 0
3 years ago
I'm horrible at this please help:((((​
wel

Step-by-step explanation:

You can insert different values of x to find y

For example:

x = 4

Plug in x into the equation

y = -1/2(4) + 5

y = -2 + 5

y = 3

So your point will be (4, 3)

If you do 1 more like this, you can draw a line between them. Or you can use Desmos to graph the line.

Hope this helped you!!

8 0
3 years ago
A researcher wants to see if birds that build larger nests lay larger eggs. He selects two random samples of nests: one of small
True [87]

Answer:

95% confidence interval for the difference between the average mass of eggs in small and large nest is between a lower limit of 0.81 and an upper limit of 2.39.

Step-by-step explanation:

Confidence interval is given by mean +/- margin of error (E)

Eggs from small nest

Sample size (n1) = 60

Mean = 37.2

Sample variance = 24.7

Eggs from large nest

Sample size (n2) = 159

Mean = 35.6

Sample variance = 39

Pooled variance = [(60-1)24.7 + (159-1)39] ÷ (60+159-2) = 7619.3 ÷ 217 = 35.11

Standard deviation = sqrt(pooled variance) = sqrt(35.11) = 5.93

Difference in mean = 37.2 - 35.6 = 1.6

Degree of freedom = n1+n2 - 2 = 60+159-2 = 217

Confidence level = 95%

Critical value (t) corresponding to 217 degrees of freedom and 95% confidence level is 1.97132

E = t×sd/√(n1+n2) = 1.97132×5.93/√219 = 0.79

Lower limit = mean - E = 1.6 - 0.79 = 0.81

Upper limit = mean + E = 1.6 + 0.79 = 2.39

95% confidence interval for the difference in average mass is (0.81, 2.39)

3 0
3 years ago
Mr Ferris is hanging pictures on the wall. He would like the picture to be in the center of the wall. The picture measures 22 1/
jek_recluse [69]

Answer:

24.75

Step-by-step explanation:

Take 72 ( 6 foot in inches) subtract 22 1/2 from it. You get 49.5. divide 49.5 by 2 and you get 24.75 on each side of the wall. You're welcome . Dont forget to show work.

3 0
3 years ago
Read 2 more answers
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