All categories

3 years ago

1) An elevator is on the 15th floor, it goes down 18 floors

Mathematics

2 answers:

Sophie [7]3 years ago

8 0

Answer:2nd floor

Step-by-step explanation:

since the elevator is on the 15th floor and you go down 18 that’s equals negative 3 then you go back up 5 floors and you add 5 to negative 3 which leaves you with the 2nd floor

Elenna [48]3 years ago

3 0

Answer:

The elevator is now on the 2nd floor.

Step-by-step explanation:

15 - 18 = -3

-3 + 5 = 2

You might be interested in

A vending machine operator has determined that the number of candy bars sold per week by a certain machine is a random variable

docker41 [41]

Answer:

The answer is below

Step-by-step explanation:

Let Y represent the profit per day, and x represent the number of bar sold per day. Hence:

Y = 0.25x - 2

a) The mean is given as:

$\mu_y=E(Y)=E(0.25X-2) = 0.25E(X)-2\\\\But\ E(X)=mean\ of\ machine=125. Hence:\\\\E(Y)=0.25(125)-2=29.25\\\\E(Y)=\$29.25$

b) The standard deviation of y is:

$\sigma_y=var(0.25X-2)\\\\\sigma_y=0.25\sigma(X)\\\\but\ \sigma_X=7,hence:\\\\\sigma_y=0.25(7)=1.75\\\\\sigma_y=\$1.75$

6 0

3 years ago

What is the value of z so that-9 and 9 are both solutions of x^2+z=103?

notka56 [123]

If the sol'ns are -9 and 9, then we can use this to form our eq'n:
(x - 9)(x + 9) = 0
x^2 - 81 = 0
so...
x^2 + z - 103 = x^2 -81
z - 103 = -81
z = -81 + 103
z = 22

8 0

3 years ago

Find the value of a so that the lines with the given equations are perpendicular:

Korvikt [17]

Perpendicular slopes are opposite and reciprocals of each other so “a” would equal 3.
6y + 3x=6
6y = -3x + 6
y = -1/2x + 1

5 0

3 years ago

Can someone please help me with this

anygoal [31]

Answer:

the picture is blurry

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Help me !!!!!!!!!!!!!!!!!!!!

True [87]

Answer:

0 isnt a number loll

Step-by-step explanation:

6 0

3 years ago