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2 years ago

-y² + z; use y=-2 and z=5

Mathematics

2 answers:

Alecsey [184]2 years ago

8 0

Step-by-step explanation:

-(-2)^2 + 5

-(4) +5

-4 + 5

notsponge [240]2 years ago

5 0

Answer:

Step-by-step explanation:

wrd 2 my momz its 37

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Tyler has to figure out the amount of metal to cover the back of the shelves in Mrs. Edwards room. These are the dimensions. Wha

horsena [70]

The amount of metal he will need to cover the back of the shelves is 180 inches².

The figure above is like a composite figure. Therefore, lets find the area.

<h3>Area of the composite figure</h3>

The area of the figure is the sum of the whole individual 2 dimensional shapes in the composite figure.

Therefore, two rectangles can be drawn from it.

area of rectangle = lw

where

l = length

w = width

Therefore,

area of rectangle 1 = 9 × 8 = 72 inches²

area of rectangle 2 = 6 × 18 = 108 inches²

Total area = 108 + 72 = 180 inches²

Therefore, the amount of metal he will need to cover the back of the shelves is 180 inches².

learn more on area here: brainly.com/question/25849553

4 0

3 years ago

The commute time for people in a city has an exponential distribution with an average of 0.5 hours. What is the probability that

mamaluj [8]

Answer:

0.314 = 31.4% probability that a randomly selected person in this city will have a commute time between 0.4 and 1 hours

Step-by-step explanation:

Exponential distribution:

The exponential probability distribution, with mean m, is described by the following equation:

$f(x) = \mu e^{-\mu x}$

In which $\mu = \frac{1}{m}$ is the decay parameter.

The probability that x is lower or equal to a is given by:

$P(X \leq x) = \int\limits^a_0 {f(x)} \, dx$

Which has the following solution:

$P(X \leq x) = 1 - e^{-\mu x}$

The probability of finding a value higher than x is:

$P(X > x) = 1 - P(X \leq x) = 1 - (1 - e^{-\mu x}) = e^{-\mu x}$

In this question:

$m = 0.5, \mu = \frac{1}{0.5} = 2$

What is the probability that a randomly selected person in this city will have a commute time between 0.4 and 1 hours?

$P(0.4 \leq X \leq 1) = P(X \leq 1) - P(X \leq 0.4)$

In which

$P(X \leq 1) = 1 - e^{-2} = 0.8647$

$P(X \leq 0.4) = 1 - e^{-2*0.4} = 0.5507$

$P(0.4 \leq X \leq 1) = P(X \leq 1) - P(X \leq 0.4) = 0.8647 - 0.5507 = 0.314$

0.314 = 31.4% probability that a randomly selected person in this city will have a commute time between 0.4 and 1 hours

4 0

3 years ago

Which numbers are included in the set of integers that when added to

brilliants [131]

Wouldnt it be all of them?

7 0

3 years ago

Read 2 more answers

The pendulum of an antique clock has been damaged and needs to be replaced.If the original pendulum completed one swing every 1.

baherus [9]

Answer:

The length of pendulum is 55.853cm

Step-by-step explanation:

We are given

the original pendulum completed one swing every 1.5 seconds

so, T=1.5 sec

now, we can use time period formula

$T=2\pi \sqrt{\frac{l}{g} }$

l is the length of pendulum

g is acceleration due to gravity

$g=9.8m/s^2$

now, we can plug values

and then we can solve for l

$1.5=2\pi \sqrt{\frac{l}{9.8} }$

$\frac{l}{9.8}=0.05699$

$l=0.55853m$

In cm

$l=55.853cm$

3 0

3 years ago

SOMEONE PLEASE HELP NOW ILL GIVE YOU A EAST 11 POINTS

Valentin [98]

Answer:

it will be 13

8 0

3 years ago

-y² + z; use y=-2 and z=5​

-y² + z; use y=-2 and z=5