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stepan [7]
3 years ago
15

In the diagram, line r is parallel to BC.

Mathematics
2 answers:
Nady [450]3 years ago
4 0
The anwser is D for sure
WITCHER [35]3 years ago
3 0

Answer:

d

Step-by-step explanation:

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Use the table of systolic blood pressures (in mm Hg) in each arm
e-lub [12.9K]

Answer:

The 90% confidence interval would be given by (63.330;81.070)

Step-by-step explanation:

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

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".

Let put some notation

x=left arm , y = right arm

x: 175 169 182 146 144

y: 102 101 94 79 79

Since the Confidence is 0.90 or 90%, the value of a = 0.1 and a/2= 0.05we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.05,4)".And we see that ta/2= 2.13

3 0
2 years ago
PLEASE HELP ME <br> I don’t know how to solve this one please give me a good explanation
forsale [732]
You have to use the distributive property, therefore you get 2x+13/3.

The next step is to do 2 x 5 because they gave us a number for the variable x. Then you have to do 2 x 13 which gives us 26.

10+26=36 and 36/3=12, hope I helped, Have a nice day! :)
3 0
2 years ago
Read 2 more answers
Andrew drives through 5 intersections with stoplights on his way to work. He records that he is stopped by a red light in 2 of t
photoshop1234 [79]

Answer:

He should expect to be stopped a total of 16 times

Step-by-step explanation:

What the question is saying is that out of every 5 intersections, he would be stopped at 2.

Now, for forty times in which he passes through an intersection , we want to know the number of times in which he would be stopped

In this case we only need to multiply the probability by the number of times in which he passes an intersection and that would be 2/5 * 40 = 16 times

4 0
3 years ago
12x3 + 13x – 5<br> 2x – 1
salantis [7]

Answer:

ANSWER: 24x^4 - 12x^3 + 26x^2 - 23x + 5

Step-by-step explanation:

6 0
3 years ago
Abi and Ali shared £35 in the ratio 1 : 6.<br> Work out how much Ali received.
baherus [9]

Answer:

£30

Step-by-step explanation:

To tackle these 'sharing' ratios problems, first find the total amount parts in the ratio.

1 : 6 = 1 + 6 = 7 parts

Now divide the total amount of parts by the total amount of money shared

35 / 7 = 5

Now multiply the answer by the value that is appropriate.

In this case, they want you to work out how much Ali recieved.

Ali's value is 6

6 × 5 = £30

hope this helps :)

4 0
2 years ago
Read 2 more answers
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