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ArbitrLikvidat [17]
3 years ago
10

??? r + 3r + _ = 6r 3 2 3r 2r

Mathematics
2 answers:
Nina [5.8K]3 years ago
7 0
2r because adding 3r and r gets you 4r so you would need 2 more
Elena-2011 [213]3 years ago
4 0

Answer:

2r

Step-by-step explanation:

r+3r+_=6r

4r+_=6r

Subtract 4r from both sides.

_=2r

Therefore the answer is 2r.

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Most college-bound students take either the SAT(Scholastic Assessment Test) or the ACT (which originally stood for American coll
Jlenok [28]

Answer:

Luis would need to have a SAT score of 574.

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score 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 p-value, we get the probability that the value of the measure is greater than X.

Nicole's z-score:

ACT scores have a mean of about 21 with a standard deviation of about 5, which means that \mu = 21, \sigma = 5

Nicole gets a score of 24, which means that X = 24. Her z-score is:

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

Z = \frac{24 - 21}{5}

Z = 0.6

What score would Luis have to have on the SAT to have the same standardized score(z-score) as Nicole's standardized score on the ACT?

Luis would have to get a score with a z-score of 0.6, that is, X when Z = 0.6.

SAT scores have a mean of about 508 with a standard deviation of about 110, which means that \mu = 508, \sigma = 110.

The score is:

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

0.6 = \frac{X - 508}{110}

X - 508 = 0.6*110

X = 574

Luis would need to have a SAT score of 574.

8 0
2 years ago
Jade used Fraction 3 over 4 yard of fabric to make a scarf. Can she make 2 of these scarves with Fraction 1 and 4 over 5 yards o
goldfiish [28.3K]
The answer is d :) you’re welcome
3 0
2 years ago
The length of a pool is 3 feet more than twice its width. If the perimeter of the pool is 72 feet, find the dimensions of the po
photoshop1234 [79]
[tex]x-length\\ y-width\\ x=2y+3\\ Perimeter: 2x+2y=72\\\\ System\ of\ equations:\\ \left \{ {{x=2y+3} \atop {2x+2y}} \right. \\ Substituting\ x=2y+3\\ 2(2y+3)+2y=72\\ 4y+6+2y=72\\ 66y=60|:6\\ y=11\\x=2y+3=2*11+3=25[/tex]
8 0
3 years ago
Read 2 more answers
u don’t need to do the explanations for the questions. Just answer each expression with correct/incorrect. thank-you :)
tigry1 [53]

Answer:

correct

incorrect

incorrect

correct

5 0
3 years ago
2 factors of 28 add up to 9 what are they
bogdanovich [222]
It is 2 and it is 7 the two factors your welcome  
5 0
3 years ago
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