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3 years ago

12

The constant in the expression-2x is?

1 answer:

Kryger [21]3 years ago

8 0

Answer:

-2

Step-by-step explanation:

Well if we break -2x apart we see that it's really just -2 × x.

Now, let's say you completely forget this you can think of it like this:

-2x is, -2 and x.

Between these two terms x is the variable leaving -2.

You can try the same thing with these:

5x is ?

-9x is ?

50x is ?

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A high school student took two college entrance exams, scoring 1070 on the SAT and 25 on the ACT. Suppose that SAT scores have a

antoniya [11.8K]

Answer:

Due to the higher z-score, he did better on the SAT.

Step-by-step explanation:

When the distribution is normal, we use 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.

Determine which test the student did better on.

He did better on whichever test he had the higher z-score.

SAT:

Scored 1070, so $X = 1070$

SAT scores have a mean of 950 and a standard deviation of 155. This means that $\mu = 950, \sigma = 155$ .

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

$Z = \frac{1070 - 950}{155}$

$Z = 0.77$

ACT:

Scored 25, so $X = 25$

ACT scores have a mean of 22 and a standard deviation of 4. This means that $\mu = 22, \sigma = 4$

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

$Z = \frac{25 - 22}{4}$

$Z = 0.75$

Due to the higher z-score, he did better on the SAT.

8 0

3 years ago

a factory produced 6911 boxes of ice cream after 135 boxes of ice cream were sold, the factory produced 347 more of ice cream .h

VARVARA [1.3K]

Answer:

There are 7123 boxes of ice cream left in the factory

Step-by-step explanation:

Initially produced in factory : 6911 boxes

135 boxes are sold, so the factory now has 6911 - 135 = 6776

347 more boxes are produced, so we add this number to what there was in the factory: 6776 + 347 = 7123

8 0

2 years ago

What is (-1 1/2) to the 3 power

saw5 [17]

Answer:

-3.375

Step-by-step explanation:

1. convert -1 1/2 to -3/2

2. (-3/2)^3

3. -27/8

4. -3.375

brainliest maybe ?

6 0

2 years ago

Answer each question. Would they be functions, or not functions?

torisob [31]

The answer is not functions

8 0

2 years ago

Read 2 more answers

Suppose that Stephen is the quality control supervisor for a food distribution company. A shipment containing many thousands of

kondaur [170]

Answer: 0.8031

Step-by-step explanation:

Binomial distribution:

For a binomial variable x,

The probability of getting success in x trials = $P(X=x)=^nC_xp^x(1-p)^{n-x}$

, where n = Total trials .

p= Probability of getting success in each trial.

For the given situation , we take x as the number of damaged apple .

Given : The proportion of damaged apples : p=0.15

n= 10

Then, the probability that his sample will contain at least one damaged apple. :-

$P(x\geq1)=1-P(x$

Hence, the required probability = 0.8031

5 0

3 years ago