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gayaneshka [121]
3 years ago
7

Rena, Chris, and John sent a total of 100 and one text messages during the weekend. Chris sent five more messages than Reina. Jo

hn sent two times as many messages as Rena. How many messages did they each send?
Mathematics
1 answer:
timurjin [86]3 years ago
7 0

Answer:

Reina sent 24

Chris sent 29

John sent 48

Step-by-step explanation:

Reina sent 24.

Chris sent 5 more

So 29.

John sent double if Reina's.

24•2

48

Then add to check work.

24+29+48

101

Hope this helps

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11) Help pls I have the answer I just need to show the work.
spayn [35]
True.
The Pythagorean theorem is a^2 + b^2 = c^2 where a^2 and b^2 are the two legs of the triangle (two sides connected by the right angle) and c is the hypotenuse (longest side, opposite the right angle).

To solve using the Pythagorean theorem, plug in sides AC and CB into a and b, then solve for c.

23^2 + 31^2 = c^2
529 + 961 = c^2
c^2 = 1490
c = √1490 = 38.601

I hope this helps!
4 0
3 years ago
Whats the y-intercept
svet-max [94.6K]

Answer:

2

Step-by-step explanation:

the y-intercept is where the line meets the y-axis

7 0
3 years ago
Read 2 more answers
Which steps should be used to compare the fractions of 2/9 and 5/6​
elena55 [62]
Hope this helps the picture explains how to do it hope its useful:)

7 0
3 years ago
In the 1980’s, a clinical trial was conducted to determine if taking an aspirin daily reduced the incidence of heart attacks. Of
zubka84 [21]

There is enough evidence to conclude that taking aspirin cannot  reduces the chance of cancer.

Given sample size of patients take aspirin 11037, sample size of patients who have assigned placebo group be 11034. 104 doctors who take aspirin had a heart attack, 189 doctors had placebo had heart attacks.

First we have to form hypothesis.

H_{0} :p{1} -p_{2} =0

H_{1}:p_{1} -p_{2} < 0

We have to find the respective probabilities.

p_{1}=104/11037

=0.0094

p_{2}=189/11034

=0.0171

Now their respective margin of errors.

s_{1}=\sqrt{ {(0.0094*0.9906)/11037}

=0.0009

s_{2}=\sqrt{0.0171*0.9829}

=0.0011

Hence the distribution of the differences,they are given by:

p=p_{1} -p_{2}

=0.0094-0.0171

=-0.0077

S=\sqrt{s_{1} ^{2}+s_{2} ^{2}  }

=\sqrt{(0.0009)^{2} +(0.0011)^{2} }

=0.00305

z=(p -f)/S (In which f=0 is the value tested at the null hypothesis)

=(-0.0077-0)/0.00305

=-2.52

p value will be 0.005.

p value of 0.05 significance level.

z=1.96.

1.96>0.005

So we will reject the null hypothesis which means it cannot reduce the whole chance of becomming a heart attack.

Hence there is enough evidence to conclude that taking aspirin cannot  reduces the chance of cancer.

Learn more about t test at brainly.com/question/6589776

#SPJ4

6 0
2 years ago
If anybody could help me please :,) will give brainliest + 100 points
Alinara [238K]

Answer:

P(B and D) = 0.35

Step-by-step explanation:

It is a probability tree diagram. Here to find P(B and D):

apply method:

P(A and B) = P(A) × P(B)

Here given:

  • P(B) = .5
  • P(D) = .7

So, P(B and D):

  • P(B) × P(D)
  • .5 × .7
  • .35 ≈ 0.35
8 0
2 years ago
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