2 years ago

I really need help please:)

Mathematics

1 answer:

N76 [4]2 years ago

4 0

Answer: the 3rd one or the 1rst one

Step-by-step explanation:

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Pls help step by step (this is supposed to be middle school level)

dedylja [7]

3 hope thsi helps beheld

3 0

2 years ago

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1-1= what i need to know.

eduard

Answer:

0 is the answer same as 0+0=0

hope this helps

have a good day :

Step-by-step explanation:

6 0

2 years ago

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A random sample of 500 reports an average yearly income of $42,000 with a standard deviation of $1000. An estimate of the parame

Lorico [155]

Answer:

Step-by-step explanation:

Confidence Interval = mean + or - error margin

Mean = 42,000, error margin = width of estimate of the parameter ÷ 2 = 175 ÷ 2 = 87.50

We can be 95% confident that the population mean is 42,000 plus or minus 87.50

8 0

3 years ago

What is the best method to solve the below system of equations<br> 3x + 2y =5 <br> y=2x+3

Nesterboy [21]

Using substitution method
Your answer is

X=1
Y=1

6 0

3 years ago

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Heyy pls help! worth 20 points, and please only help if you know the answer. also no links those r kinda annoying lol

iragen [17]

Step 1: Find the slope:

$m= \dfrac{y_2-y_1}{x_2-x_1}= \dfrac{-2-7}{4-(-2)} = \dfrac{-9}{6}= -\dfrac{3}{2}$

This gives you $y=-\dfrac{3}{2}x+b$ , but we need to find b.

To find b, substitute in one (x,y) pair and it doesn't matter which one. I'll go with (4,-2):

$\begin{aligned}-2&=-\dfrac{3}{2}(4)+b\\[0.5em]-2&=-6+b\\[0.5em]4&=b\end{aligned}$

Now take that b-value and plug in into the slope-intercept form:

$y=-\dfrac{3}{2}x+4$

It's always a good idea to toss in the other x-value from the other point, to make sure it checks out.

7 0

2 years ago