Let Y = X + N where X and N areindependent zero-mean

Mathematics

1 answer:

Mandarinka [93]3 years ago

3 0

Answer:

Please see attachment

Step-by-step explanation:

Please see attachment

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deanna gets 3 problema incorrect on her math quiz. her score is 85%. how many questions are on the quiz

never [62]

Let's start by seeing what percentage is incorrect.
100-85=15
So, 15% is incorrect when answering 3 problems wrong. So let's divide 15 by 3.
15÷3=5
So, each problem is worth 5%, let's divide 100 by 5. The reason I'm doing thiis is to find how many questions are on the quiz, since if you got them all right, it's 100.
100÷5
20
There are 20 questions, let's make sure this is correct.
If she got 3 wrong, she got 17 right. Let's calculate her percentage and make sure it is the right one.
17÷20
.85×100
85%
So, there are 20 questions on the math quiz.

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4 years ago

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For which of the following linear equations is the x-intercept

liraira [26]

Replacing x by 2 and y by we can see which one is correct
Just see if these 2 values fit
The answer is B 3x + 2y = 6

because LHS = 3(2) + 2(0) = 6 + 0 = 6 = RHS

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3 years ago

A concession stand at a sports stadium sells 600 bags of peanuts (each game) if the price of each bag is $4.00. For each $0.25 i

grin007 [14]

Answer:

Price = $4.50

Maximum revenue = $2,430

Step-by-step explanation:

The concession stand sells 600 bags of peanut at $4.00 (600, $4.00).

If there is a $1 increase in price, the number of bags old will decrease by 120, which mens that 480 bags of peanuts will be sold at $5.00 (480, $5.00).

Tracing a linear relationship between price and quantity sold with the two given points:

$m = \frac{5-4}{480-600}\\ m=-\frac{1}{120}$