3 years ago

What is 65+78 i cant find any answer and my teacher is being a cool

Mathematics

2 answers:

igomit [66]3 years ago

6 0

Answer:

143

Step-by-step explanation:

neonofarm [45]3 years ago

4 0

Answer:143

Step-by-step explanation:

it is 143 if you add 65+78

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Suppose that a rectangular piece of glass has a perimeter of 20 meters. If we multiply both its length and its width by 4, what

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Answer:

Answer B is the correct answer

Step-by-step explanation: :)

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3 years ago

A police department reports that the probabilities that 0, 1, 2, and 3 burglaries will be reported in a given day are 0.53, 0.40

SpyIntel [72]

The mean of the probability distribution is given by the expected value given by

$E(x)=\sum xp(x) \\ \\ =0(0.53)+1(0.40)+2(0.05)+3(0.02) \\ \\ =0.40+0.10+0.06=0.56$

The variance of the probability distribution is given by

$Var(x)=(x-\bar{x})^2p(x) \\ \\ =(0-0.56)^2(0.53)+(1-0.56)^2(0.40)+(2-0.56)^2(0.05)\\+(3-0.56)^2(0.02) \\ \\ =(-0.56)^2(0.53)+0.44^2(0.40)+1.44^2(0.05)+2.44^2(0.02) \\ \\ =0.3136(0.53)+0.1936(0.40)+2.0736(0.05)+5.9536(0.02) \\ \\ =0.166208+0.07744+0.10368+0.119072=0.4664$

The standard deviation is given by

$\sigma(x)=\sqrt{Var(x)} \\ \\ =\sqrt{0.4664}=0.683$

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3 years ago

Julio Montoya earns $16.80 per hour for a 40-hour work week. How much more per week would Montoya earn if he received a 10 perce

uranmaximum [27]

Answer:

He would make $67.20 more a week if he got the increase.

Step-by-step explanation:

10% of $16.80 is $1.68. Add $1.68 to $16.80. You get $18.48. Multiply that by 40 hours. You get $739.20. Next, subtract $672 from $739.20. Your answer to that is how much more he'll make if he gets the increase.

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3 years ago

4x - 7y = -40 <br> 3x - 2y = -4

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<h2>Heres your answer: x=4,y=8</h2>

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3 years ago

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Step-by-step explanation:

the scale factor is 1

1/1

both triangles are similar and the scale factor is 1/1

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3 years ago