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NeX [460]
3 years ago
10

What is 84 divide by 4

Mathematics
2 answers:
Stels [109]3 years ago
5 0
It's 21. If you multiply 4 by 21 you get 84. Not good at giving math explanations sorry.
prohojiy [21]3 years ago
3 0
The answer to 84 divided by 4=21.
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What is x-3=14 x-2=y
Umnica [9.8K]

Answer:

x=17

y=15

Step-by-step explanation:

First plug in the numbers:

x-3=14 x-2=y

What does 3+14=? Well it should equal 17 if added properly.

So then this would be true 17-3=14.

Then if x-2=y you could write 17-2=15. Then y=15

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3 years ago
Which is the solution to the inequality?
galina1969 [7]

Answer:

the last one

Step-by-step explanation:

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3 years ago
The speeds of cars on a given i street we are normally distributed with a mean of 72 miles per hour and a standard deviation of
Ostrovityanka [42]

Answer: 72.78% of the drivers are traveling between 70 and 80 miles per hour based on this distribution.

Step-by-step explanation:

Let X be a random variable that represents the speed of the drivers.

Given: population mean : M = 72 miles ,

Standard deviation: s= 3.2 miles

The probability that the drivers are traveling between 70 and 80 miles per hour based on this distribution:

P(70\leq X\leq 80)=P(\frac{70-72}{3.2}\leq \frac{X-M}{s}\leq\frac{80-72}{3.2})\\\\= P(-0.625\leq Z\leq 2.5)\ \ \ \ \ [Z=\frac{X-M}{s}]\\\\=P(Z\leq2.5)-P(Z\leq -0.625)\\\\\\ =0.9938-0.2660\ \ \ [\text{Using p-value calculator}]\\\\=0.7278

Hence, 72.78% of the drivers are traveling between 70 and 80 miles per hour based on this distribution.

3 0
3 years ago
Log In a survey of a town, 63% of residents own a car, 20% of residents own a truck, and 4% of residents own both a car and a tr
yan [13]

Answer:

6%

Step-by-step explanation:

Let T= truck

C= Car

We are looking for the probability that someone owns a truck given that they own a car

or

P(T|C)

The conditional probability formula is as follows:

P(T|C)=(T∩C)/C

plugging in numbers..

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4 0
3 years ago
A machine is designed to fill 16-ounce bottles of shampoo. When the machine is working properly, the amount poured into the bott
DiKsa [7]

Answer:

Between 15.95 ounces and 16.15 ounces.

Step-by-step explanation:

We have the following value m, being the mean, sd, being the standard deviation and n, the sample size:

m = 16.05

sd = 0.1005

n = 4

We apply the formula of this case, which would be:

m + - 2 * sd / (n ^ 1/2)

In this way we create a range, replacing we have:

16.05 + 2 * 0.1005 / (4 ^ 1/2) = 16.1505

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Which means that 95% of all samples are between 15.95 ounces and 16.15 ounces.

4 0
3 years ago
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