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3 years ago

you go down 8 floors in an elavator your friend goes up 5 floors in a elevator write each amount as a integer

Mathematics

2 answers:

Dimas [21]3 years ago

6 0

the answer would be this
-8
+5

ioda3 years ago

6 0

Answer:

$-8$ floors and $5$ floors.

Step-by-step explanation:

We have been given that you go down 8 floors in an elevator. This means that our elevation is decreasing.

We know that negative numbers represent decreasing quantities, therefore, your elevation would be $-8$ floors.

We are also told that your friend goes up 5 floors in a elevator .

We know that positive numbers represent increasing quantities, therefore, your friend's elevation would be $5$ floors.

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Jena and matt, working together, can mow the lawn in 44 hours. working alone, matt takes four times as long as jena. how long do

madam [21]

Let jena take x hours to mow the lawn on her own.- then we can write the equation

1/x + 1/4x = 1 / 44

44 + 11 = x

x = 55

x takes 55 hours to mow the lawn

6 0

4 years ago

Find the mean, variance, and standard deviation of the binomial distribution with the given values of n and p. , The mean, ,

klemol [59]

Complete Question

Find the mean, variance, and standard deviation of the binomial distribution with the given values of n and p. , The mean, , is nothing. (Round to the nearest tenth as needed.)

p = 0.6 n = 18

Answer:

The mean $\mu = 10.5$

The standard deviation $\sigma = 2.08$

The variance $var = 4.32$

Step-by-step explanation:

From the question we are told that

The probability of success is $p = 0.6$

The sample size is $n = 18$

Generally given that the distribution is binomial, then the probability of failure is mathematically represented as

$q = 1- p$

substituting values

$q = 1- 0.6$

$q =0.4$

Generally the mean is mathematically evaluated as

$\mu = np$

substituting values

$\mu = 18 * 0.6$

$\mu = 10.5$

The standard deviation is evaluated as

$\sigma = \sqrt{npq}$

substituting values

$\sigma = \sqrt{18 * 0.6 * 0.4}$

$\sigma = 2.08$

The variance is evaluated as

$var = \sigma^2$

substituting value

$var = 2.08^2$

$var = 4.32$

4 0

4 years ago

A race car accelerates at 2 m/s2 from 12 m/s to 18 m/s. Find distance and time

Marizza181 [45]

Answer:

Distance = 45 meters

Time = 3 seconds

Step-by-step explanation:

Here, we want to calculate distance and time

To find the time, we can use one of the Newtons law of motion

V = U + at

In this question

V = final velocity = 18 m/s

U = initial velocity = 12 m/s

a = acceleration

Thus;

18 = 12 + 2(t)

18-12 = 2t

2t = 6

t = 6/2

t = 3 seconds

Mathematically we can also find the distance using one of the equation of motion;

D = ut + 1/2 at^2

D = 12(3) + 1/2 * (2) * 3^2

D = 36 + 9

D = 45 m

6 0

3 years ago

Graph the equation: x = y^2 - 2

Lesechka [4]

Draw a cartesian plane, create a graph with the equation x = y^2 - 2
then substitute numbers into the equation so that it is true, to find points on the graph, e.g. substitute y with 1, you get
x = 1^2 - 2
x = 1 - 2 = -1, so when y = 1, x = -1, this point is (-1, 1)

for the next substitute y with 2,
x = 2^2 - 2
x = 4 - 2 = 2, the point is (2, 2)
you might want to try negative values of y
y = -1, x = (-1)^2 - 2
x = -1 the point is (-1,-1)

then plot the points on the graph

5 0

3 years ago

PLEASE HELP !! ILL GIVE BRAINLIEST *EXTRA 40 POINTS* DONT SKIP :(( .!

UNO [17]

Answer:

D ez

Step-by-step explanation:

6 0

3 years ago