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Yakvenalex [24]
2 years ago
12

two amounts of money are in the ratio 8:3.if the second amount is $4.05, what is the value of the first amount

Mathematics
1 answer:
bulgar [2K]2 years ago
5 0

Answer:

10.8$

Step-by-step explanation:

(8*4.03)/3 = 10.8

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Erin and steve divided 0.84
umka2103 [35]

Answer:

Step-by-step explanation:

idk

5 0
3 years ago
A researcher was interested in seeing how many names a class of 38 students could remember after playing a name game After playi
Andreas93 [3]

Answer:

Proportion of the students recalled more than 15 names is 91.77%.

Step-by-step explanation:

We are given that a researcher was interested in seeing how many names a class of 38 students could remember after playing a name game After playing the name game, the students were asked to recall as many first names of fellow students as possible.

The mean number of names recalled was 19.41 with a standard deviation of 3.17.

<em>Let X = number of names recalled</em>

SO, X ~ N(\mu = 19.41,\sigma^{2} = 3.17^{2})

The z-score probability distribution is given by ;

                  Z = \frac{X-\mu}{\sigma} } } ~ N(0,1)

where, \mu = mean number of names recalled = 19.41

            \sigma = standard deviation = 3.17

The Z-score measures how many standard deviations the measure is away from the mean. After finding the Z-score, we look at the z-score table and find the p-value (area) associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X.

Now, proportion of the students recalled more than 15 names is given by = P(X > 15 names)

     P(X > 15) = P( \frac{X-\mu}{{\sigma} } } > \frac{15-19.41}{3.17}  } ) = P(Z > -1.39)

                                                      = P(Z < 1.39) = 0.9177  {using z table}

<em>Therefore, proportion of the students recalled more than 15 names is </em><em>91.77%.</em>

4 0
3 years ago
Starting at home, Luis traveled uphill to the hardware store for 3030 minutes at just 88 mph. He then traveled back home along t
dybincka [34]

Answer:

the distance from home to hardware store = (3030/60) * 88= 4444miles

time to travel back at a speed of 24mph = 4444miles /24mph = 11110 minutes


7 0
3 years ago
Best answer gets brainly
SSSSS [86.1K]
T,t,f,t,t I’m sure of it
5 0
3 years ago
Read 2 more answers
Solve questions 1-10 I just need the answer in (x,y) form
Andre45 [30]

Answer:

1. (1,1)

2.(2,-6)

3.Not sure.

4.No solution

5.(-3,4)

6. (6,-4)

7.(7,2)

8.(-7,-12)

9.(9,-1)

10.(2,1)

Step-by-step explanation:

Hope that helps bud!:)

5 0
2 years ago
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