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4 years ago

Do the thing nee ASAP answer, will give brainliest

Mathematics

1 answer:

Citrus2011 [14]4 years ago

6 0

Answer:

(-1,3)

Step-by-step explanation:

Graph the given system of equations

y=-x+2

make a table for each equation to graph it

Lets assume some value for x and find out y

x y=-x+2

-1 -(-1) + 2= 3

0 0+2 = 2

1 -1+2 = 1

Now make a table for second equation

y= 4x+7

Lets assume some value for x and find out y

x y= 4x+7

-1 4(-1) + 7= 3

0 4(0) + 7 = 7

1 4(1) + 7 = 11

The graph is attached below

Solution is (-1,3)

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Help!!!!! please!!!!!

defon

Answer:

The answer is option b.

Step-by-step explanation:

Surface area of a sphere is 4πr²

where r is the radius

diameter = radius / 2

radius = 15 / 2 = 7.5in

Surface area = 4π(7.5)²

= 225π

<h3><u>Small </u><u>sph</u><u>ere</u></h3>

radius = 9/2 = 4.5in

Surface area = 4π(4.5)²

= 81π

Difference of the surface areas is

Surface area of big sphere - surface area of small sphere

Which is

225π - 81π

Hope this helps you.

6 0

4 years ago

A persons bill at a restaurant is $42.75. Estimate the amount of a 15% tip

Alina [70]

$6.41

Step-by-step explanation:

$42.75 x 15% (which is .15) = $6.41 is the tip

7 0

3 years ago

HELP ME PLS & FAST!!

lukranit [14]

There are 6 outcomes for the cube and 4 for the spinner. So you can multiply 6 and 4. That gives you 24. The answer is C. 24. Hope this helps!

8 0

3 years ago

The lifetime of LCD TV sets follows an exponential distribution with a mean of 100,000 hours. Compute the probability a televisi

kondaur [170]

Answer:

0.9

0.3012

0.1809

230258.5

Step-by-step explanation:

Given that:

μ = 100,000

λ = 1/μ = 1 / 100000 = 0.00001

a. Fails in less than 10,000 hours.

P(X < 10,000) = 1 - e^-λx

x = 10,000

P(X < 10,000) = 1 - e^-(0.00001 * 10000)

= 1 - e^-0.1

= 1 - 0.1

= 0.9

b. Lasts more than 120,000 hours.

X more than 120000

P(X > 120,000) = e^-λx

P(X > 120,000) = e^-(0.00001 * 120000)

P(X > 120,000) = e^-1.2

= 0.3011942 = 0.3012

c. Fails between 60,000 and 100,000 hours of use.

P(X < 60000) = 1 - e^-λx

x = 60000

P(X < 60,000) = 1 - e^-(0.00001 * 60000)

= 1 - e-^-0.6

= 1 - 0.5488116

= 0.4511883

P(X < 100000) = 1 - e^-λx

x = 100000

P(X < 60,000) = 1 - e^-(0.00001 * 100000)

= 1 - e^-1

= 1 - 0.3678794

= 0.6321205

Hence,

0.6321205 - 0.4511883 = 0.1809322

d. Find the 90th percentile. So 10 percent of the TV sets last more than what length of time?

P(x > x) = 10% = 0.1

P(x > x) = e^-λx

0.1 = e^-0.00001 * x

Take the In

−2.302585 = - 0.00001x

2.302585 / 0.00001

= 230258.5

3 0

3 years ago

Can someone help me with this PLZ

nydimaria [60]

What should we be helping you with?

I don't see the question?

Please state it clearly so that I can help you. I would love to help you!

7 0

3 years ago