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3 years ago

15

Please help ill give brainliest and 20 points (when I can) 2) The ratio 35 : 84 in simplest form is: *

1 answer:

Ray Of Light [21]3 years ago

8 0

Answer:

None Of The Above

Step-by-step explanation:

Its 7/17

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Christine must buy at least 45 fluid ounces of milk at the store. The store only sells milk in 200 milliliter bottles. If there

ratelena [41]

Since there are 1000 milliliters in a liter, that means that there are 33.8/1000 fluid ouncers per milliliter. That means that each 200 mil bottle is 6.76 fluid ounces or 33.8/1000*200. 45/6.76 = 6.66 but you have to round up to a whole number of bottles since you can buy 2/3 of a bottle which makes your answer 7 bottles.

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3 years ago

What is another way to find the total cost of a jacket for $15.30 with a sales tax of 6.5% ?

omeli [17]

You can divide mabye......idk

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3 years ago

Brittany uses the rowing machine and the stair machine at the gym for an exercise program. Her trainer wants her on an exercise

dangina [55]

Answer:

The equations are: $x+ y = 30$ and $x = 3y$ .

Step-by-step explanation:

We are given that Brittany uses the rowing machine and the stair machine at the gym for an exercise program.

Let the time spend by Brittany on the stair machine be represented by the variable $x$ .

and the time spend by Brittany on the rowing machine be represented by the variable $y$ .

Now, there are two conditions stated by her trainer;

The first condition states that Brittany will exercise for 30 minutes, dividing her time between the two types of machines, that is;

$x + y = 30 \text{ minutes}$

The second condition states that Brittany will spend three times as much time on the stair machine as on the rowing machine, that is;

$x = 3y$

So, the equations are: $x+ y = 30$ and $x = 3y$ .

These equations can be solved either using the substitution method or the elimination method.

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3 years ago

A person's blood pressure is monitored by taking 4 readings daily. The probability distribution of his reading had a mean of 13

ss7ja [257]

Answer:

a) Mean = 133, Standard deviation = 2.5

b) Normal distribution

c) 0.0026

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 4

Mean = 133

Standard deviation = 5

a) Mean and the standard deviation of the sampling distribution of the sample mean for the four observations each day.

The sampling distribution has a mean equal to the population mean

$\bar{x} = \mu = 133$

The standard deviation of the sampling distribution is given by:

$\sigma_s = \dfrac{\sigma}{\sqrt{n}} = \dfrac{5}{\sqrt{4}} = 2.5$

b) Shape of the sampling distribution

Central limit theorem:

When a large sample is drawn from a normal distribution, then the distribution of sample means approaches a normal distribution.

Since the distribution is normal, the sampling distribution of the sample mean will be bell shaped and follow a normal distribution.

c) P(sample mean exceeds 140)

$P( x > 140) = P( z > \displaystyle\frac{140 - 133}{2.5}) = P(z > 2.8)$

$= 1 - P(z \leq 2.8)$

Calculation the value from standard normal z table, we have,

$P(x > 140) = 1 - 0.9974 = 0.0026$

0.0026 is the probability that the sample mean exceeds 140.

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3 years ago

each student in mrs.Henderson's science class brought in 3 books for the book donation. if there are 25 students in the class,ho

Svetlanka [38]

75 books because you multiply 3 x 25 . When you do that you get 75. So the answer to the question would be 75.

7 0

3 years ago

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