07/08/20

Solve the following simultaneous equations:
Solve the following simultaneous equationsa) 5x+3y=77x-y=13b) 4x+5y=85x+4y=12(I need only b)
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07/08/20

Round your answer up to the nearest whole number.
You are a researcher studying the lifespan of a certain species of bacteria.  A preliminary sample of 30 bacteria reveals a sample mean of ¯x=78 hours with a standard deviation of s=6.8  hours.... more
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07/08/20

Give your answer to the one decimal place

If n=31, ¯x(x-bar)=36, and s=15, construct a confidence interval at a 99% confidence level. Assume the data came from a normally distributed population.
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07/07/20

Need help. Thank you
1.To compare the effect of hospital prenatal nutritional counseling on newborn birth-weights, we conduct a matched-pair study of women who obtain prenatal care at a certain hospital, matching women... more
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07/07/20

Normal Distribution
The labels on boxes of Cheesy Poofs say that the box contains 16 ounces of Cheesy Poofs, but that doesn’t guarantee that each box contains exactly 16.00 ounces. The machine that fills the boxes... more
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07/07/20

The sum of a number divided by -2 and 7 is -5
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07/07/20

Suppose you are have the following null and alternative hypotheses for a test you are running: H 0 : p = 0.63 H a : p ≠ 0.63 Calculate the test statistic, rounded to 3 decimal places
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07/07/20

In a random sample of size 52, 26 people say they generally get less than 8 hours of sleep a night. Calculate the point estimates ˆ p and ˆ q
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07/07/20

In a random sample of size 52, 26 people say they generally get less than 8 hours of sleep a night. Calculate the point estimates ˆ p and ˆ q
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07/07/20

If n = 280 and ˆ p (p-hat) = 0.35, construct a 99% confidence interval.
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07/06/20

Given f(x) = x2 + x + 1, g(x) = x – 2
Given f(x) = x2 + x + 1, g(x) = x – 2, find:a.      (f ° g)(x)b.      (g ° f)(x)c.      (f ° g)(-1)d.      (g ° f)(-1)
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07/06/20

Geometric Sequence
find the two missing terms between 128 and -2
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07/06/20

2.70 grams A chemist had 54 grams of aluminum. There are for aluminum. How milliliter many milliliters of aluminum does the chemist have?

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07/06/20

Finite: Probability
A lot contains 120 parts of which 40 are defective and 80 are good. A sample of three different parts is selected at random. (a) What is the probability that all of the parts selected are good? (b)... more
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07/06/20

Finite: Probability
A jar has 8 Red, 11 White and 1 Blue marble. A marble is selected at random, its color noted and the marble is replaced. A second marble is selected from the 20 marbles (a) What is the probability... more
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07/06/20

Card Probability

find the probability of drawing a king and then a queen (without replacement) from a standard deck of cards
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07/06/20

It is reported that 77% of workers aged 16 and over drive to work alone. Choose 8 workers at random. Find the probability that at most 7 drive at work alone
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07/06/20

probability problem

There is a bag with 3 yellow marbles 2 blue marbles and 1 green marble. The marbles are shooken up. I pull out 2 marbles one at a time. what is the probability I pick not green then blue. please... more
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07/06/20

probability problem
If you toss a coin 3 times what is the probability you will get 2 heads
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07/06/20

probability problem
Can you please help with this question?Tiffany and Emily are playing a game of flipping coins. Tiffany says I bet when I flip three coins I will get at least 2 heads. Emily thinks not. What is the... more
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07/06/20

binomial distribution
In a certain school district, it was observed that 27% of the students in the element schools were classified as only children (no siblings).  However, in the special program for talented and... more
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07/06/20

Hypothesis Testing

You are conducting a study to see if the proportion of voters who prefer Candidate A is significantly different from 0.39. You use a significance level of α=0.005.      H0:p=0.39     H1:p≠0.39You... more
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07/06/20

Hypothesis Testing

In a recent Super Bowl, a TV network predicted that 84 % of the audience would express an interest in seeing one of its forthcoming television shows. The network ran commercials for these shows... more
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07/06/20

tough probability question, please help
three-fifth of balls from bag A, all the white balls from bag B and one-third of balls form bag c are placed in a new bag d. If 4 balls are picked in random, what is the possibility of three of... more
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07/06/20

How is -9<-3x-6<6 represented in the number line?
How is the inequality -9<-3x-6<6 represented on number line?
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