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lidiya [134]
4 years ago
10

What is 2 3/4+1 3/4?

Mathematics
1 answer:
expeople1 [14]4 years ago
6 0

Answer:

9/ 2

=  4  1/ 2

=4.5

Step-by-step explanation:

Step 1 of 2: Add.  

Add

2 and 3 over 4  

2

3

4

+  

1 and 3 over 4  

1

3

4

=  

18 over 4  

18

4

Step 1 of 2: Add.  

Show the work

Step 2 of 2: Simplify.  

Simplify

18 over 4  

18

4

=  

9 over 2  

9

2

=  

4 and 1 over 2  

4

1

2

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Suppose SAT Writing scores are normally distributed with a mean of 488488 and a standard deviation of 111111. A university plans
makvit [3.9K]

Answer:

The minimum score required for the scholarship is 644.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value 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. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 488, \sigma = 111

What is the minimum score required for the scholarship?

Top 8%, which means that the minimum score is the 100-8 = 92th percentile, which is X when Z has a pvalue of 0.92. So it is X when Z = 1.405.

Z = \frac{X - \mu}{\sigma}

1.405 = \frac{X - 488}{111}

X - 488 = 1.405*111

X = 644

The minimum score required for the scholarship is 644.

4 0
4 years ago
Mike is mixing paint for his walls. he mixes 1/6 gallon blue paint and 5/8 gallon green paint in a large container. what fractio
Ronch [10]
1/6+5/8= 4/24+15/24
= 19/24
I think the total amount is 19/24.
7 0
3 years ago
Read 2 more answers
The difference between an observational study and an experiment is that
lorasvet [3.4K]

Answer:

I think it's the last one! In an experiment, one group is studied over a short period of time---

7 0
3 years ago
Kenny bought 20 packs of baseball cards. There are 12 cards in rack pack. How many cards did Kenny buy?
uranmaximum [27]
If Kenny bought 20 packs of baseball cards and there are 12 cards in a pack, you can calculate how many cards did Kenny buy using the following steps:

20 packs of cards * 12 cards in a pack = 20 * 12 = 240 cards

Result: Kenny bought 240 cards.
6 0
3 years ago
Read 2 more answers
Divide £2400 into the ratio 5:7
sergiy2304 [10]

Answer:

£1000, £1400

Step-by-step explanation:

Sum the parts of the ratio 5 + 7 = 12 parts

Divide the amount by 12 to find the value of one part of the ratio.

£2400 ÷ 12 = £200, thus

5 parts = 5 × £200 = £1000

7 parts = 7 × £200 = £1400

7 0
4 years ago
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