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MA_775_DIABLO [31]
4 years ago
7

Oliver had $50 on the day before his birthday. After he recived some money for his birthday , he had $75. Write and solve eqauti

on to find how much money oliver received for his birthday.
x+50=75
Mathematics
1 answer:
Doss [256]4 years ago
3 0

Answer:

X=25

Step-by-step explanation: 25+50=75


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​% of U.S. adults think that political correctness is a problem in America today. You randomly select six U.S. adults and ask th
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Answer:

Explanation has been given below

Step-by-step explanation:

hope fully it may concern with 70% adults then

p = 0.77

randomly select = 6

then mean will be

mean = n * p = 6*0.77=4.62

To get variance np (1-p)

then putting values we get

np (1-p) = 4.62 *0.23 = 1.0626

taking square root we get

\sqrt{1.0626}

sd = 1.03

Most samples of 6 adults would differ from the mean by no more than 1 sd

mean is differ by no more than 2 sds .

In a real-life situation, it is expected that 4 or 5 of 6 to think it is a problem.

I would not expect 0, 1, or 2.

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4 years ago
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Hi,
Answer should be letter B, since it is the one conclusion you get using both the law of detachment and the law of syllogism.
8 0
3 years ago
2x-y=-1 , 3x-y=2 solve by substition
Mazyrski [523]

Answer:

x = 3, y = 7

or (3,7)

Step-by-step explanation:

We are given the system of equations below:

\large{ \begin{cases} 2x - y =  - 1 \\ 3x - y = 2 \end{cases}}

We are required to solve the system by substitution method. What we have to do is to isolate either x-term or y-term so we can use the method. I will be isolating y-term because it is faster due to having 1 as a coefficient.

By isolating y-term, just pick one of the given equations to isolate. No need to isolate the whole system. (I will be isolating y-term of the first equation.)

\large{ \begin{cases} y=  2x + 1\\ 3x - y = 2 \end{cases}}

Then we substitute y = 2x+1 in the second equation.

\large{3x - (2x + 1) = 2}

Use the distribution property.

\large{3x - 2x - 1 = 2}

Isolate x-term to solve the equation.

\large{x = 2 + 1} \\  \large{x = 3}

Since we are solving a system of equations. We have to solve for both x-value and y-value to complete. We have already found x-value, but nor y-value yet. Therefore, our next step is to substitute the value of x that we solved in any given equations. It's recommended to substitute in an equation that doesn't have high coefficient value. So I will be substituting x = 3 in the first equation.

\large{2x - y =  - 1}  \\  \large{2(3) - y =  - 1} \\  \large{6 - y =  - 1}

Isolate and solve for y-term.

\large{6 + 1 = y} \\  \large{7 = y} \\  \large{y = 7}

Since we substitute x = 3 and get y = 7. We can write in ordered pairs as (3,7)

Hence, the solution is (3,7)

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3 years ago
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0.79

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