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harina [27]
2 years ago
7

Please anyone answer this for me?

Mathematics
1 answer:
vlabodo [156]2 years ago
7 0
Im not sure but

(sarah + tara)/2 = 8

(20 + tara)/2 = 8

20 + tara = 16

tara = 4hours ?? it doesn’t make logical sense but this is the only way i can think of

sorry if this wasn’t helpful ;-;
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Amelia is going to buy some cards for her friends.Each card costs $3.She finds a coupon for $2 off the entire purchase.Write an
dalvyx [7]

y = ( 3 * x ) - 2.

This is because the card costs for 3 $ and should be multiplied by the number of total cards she buys in that particular day. So 3 * x.

Now as she has got a 2$ off coupon, whatever the total is she gets 2 dollars off on that price. So we will subtract 2 at that time. FInally all this summed up would be equal to y.

7 0
3 years ago
Figure b is a scaled copy of figure a
Romashka [77]

Step-by-step explanation:

Im trying to get pts

6 0
2 years ago
Assume the random variable X is normally distributed with meanmu equals 50μ=50and standard deviationsigma equals 7σ=7.Compute th
nekit [7.7K]

Answer:

P(35

And we can find this probability with the following difference and using the normal standard table or excel we have:

P(-2.143

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problem

Let X the random variable that represent the variable of interest of a population, and for this case we know the distribution for X is given by:

X \sim N(50,7)  

Where \mu=50 and \sigma=7

We are interested on this probability

P(35

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

If we apply this formula to our probability we got this:

P(35

And we can find this probability with the following difference and using the normal standard table or excel we have:

P(-2.143

6 0
3 years ago
I need help on this please ​
marishachu [46]
Ya I think it is also the second one
5 0
3 years ago
Read the top and answer 100 points
77julia77 [94]

Answer:

1)30.1029995664

2)69.2980392812

3)168.080670083

4)(3x/3=13/3

x=4.33333333333

5)5x-(5000)=0

5x=5000

x=5000/5

x=1000

6)(2)3(x+2)=(6000)=0

23x+46-6000=0

23x-5954=0

23x=5954

x=5954/23

x=258+20/23

Hope this help you!

7 0
3 years ago
Read 2 more answers
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