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3 years ago

PLEASE HELP ME!!!!! Thank You

Mathematics

1 answer:

IRINA_888 [86]3 years ago

8 0

An exponential regression equation is in the form $y=a(b)^x$ . When you turn on your stat plot in your calculator and then enter those values into L1 for x's and L2 for y's, your calculator uses those values as coordinates to write an equation of best fit. The stat button is used for this. Arrow over to Calc and press enter and it will give you the equation of best fit for these data. Our equation is $y=11.55(1.85)^x$ . The coefficient of determination is .98 so it's a really close fit.

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In a store, a sample of 60 pens was selected from a box of 1,200 pens. Of these 60, 4 pens did not work. About how many pens cou

Lapatulllka [165]

Ok so if 1200 total pens and 60 were taken that's a ratio of 1200/60=20

out of 60pens 4 didn't work, again ratio is 4/60=1/15 so about 1/15 of the pens didn't work.

so we have 1200pens * 1/15broken ratio = 80 pens or we can say

20*4=80pens won't work from 20 groups of 60 and 4 out of 60 not working is 20*4=80 not working from total batch of 1200.

hope this helps you some! thank you!!!!!!!!!

3 0

2 years ago

Anthony has to practice his guitar for 1.75 hours each morning and 2.5 hours each evening for the first 4 days this week. How ma

weqwewe [10]

Answer:

17 hours

Step-by-step explanation:

From the above question,

Anthony is practicing 4 days in a week

Hence

The number of hours he practices in the morning for 4 days =

1.75 hours × 4

= 7 hours

The number of hours he practices in the evening for 4 days =

2.5 hours × 4

= 10 hours

Therefore, the total number of hours he practices this week

= 7 hours + 10 hours

= 17 hours

5 0

2 years ago

An accountant invested $5000 at a simple interest rate of 8% for 2 years. What total amount of money will she have from her inve

il63 [147K]

Answer:

$5800 plz give the brainliest

Step-by-step explanation:

you have to muliyiply everything so 5000*.08*2 which is 800 now add that to 5000 because thats the amount she put in so it will be $5800.

6 0

2 years ago

A test has five questions. To pass the test, at least three of the questions must be answered correctly. question ----> Find

torisob [31]

Answer:

1/5

Step-by-step explanation:

Total Question no. 5

Three must be answer correctly so 3/5 to pass

and 2/5 to fail

So 1/5 because to pass the test he can answer it correctly only one time

7 0

2 years ago

I need step by step explanation and answer please

fredd [130]

Answer:

Step-by-step explanation:

Trigonometric identities:

$\sin^{2} (x) + { \cos}^{2} (x) = 1 \\ {\cos}^{2} (x) = 1 - { \sin}^{2} (x) \\ { \sin }^{2} x = 1 - {\cos}^{2} (x) \:$

Replace into the equation

$\frac{ \sqrt{1 - \cos^{2} (x) } }{ \sin(x) } + \frac{ \sqrt{1 - \sin^{2}(x) } }{ \cos(x) } \\ \\ = \frac{ \sqrt{ \sin^{2}(x) } }{ \sin(x) } + \frac{ \sqrt{ \cos^{2}(x) } }{ \cos(x) }$

Remove roots and simply

$= \frac{ \sin(x) }{ \sin(x) } + \frac{ \cos(x) }{ \cos(x) } \\ \\ = 1 + 1 \\ = 2$

7 0

2 years ago