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3 years ago

Math Question plz help

Mathematics

1 answer:

nata0808 [166]3 years ago

4 0

Answer: y = 4/5 - 6.2

y = mx + b

first get the 2 points and plug it in to the equation

y - y1 = m (x -x1)

y - 3 = 4/5 (x - 4)

y - 3 = 4/5x - 3.2

add 3 on both sides

y = 4/5 - 6.2

Step-by-step explanation:

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Help me now pleasee!!!

Mice21 [21]

For this, you have to plot the points on the graph. where it says right hand height, you go down to that number on the x axis (horizontal) and then up to the correct number for right foot length (vertical)

8 0

3 years ago

Three vertices of parallelogram DEFG are D(-4,-2), E(-3,1) and F(3, 3). Find the coordinates of G.

Olin [163]

Answer:

Coordinates of G = $(2,0)$

Step-by-step explanation:

Given: Three vertices of parallelogram DEFG are D(-4,-2), E(-3,1) and F(3, 3).

To find: coordinates of G

Solution:

Midpoints of a side joining points $(a,b),\,(c,d)$ are given by $(\frac{a+c}{2},\frac{b+d}{2})$

Diagonals of a parallelogram bisect each other.

So,

Midpoint of DF = Midpoint of EG

Midpoint of DF = $(\frac{-4+3}{2},\frac{-2+3}{2})=(\frac{-1}{2},\frac{1}{2})$

Midpoint of EG = $(\frac{-3+x}{2},\frac{1+y}{2})$

Let coordinates of G be $(x,y)$

Therefore,

$(\frac{-1}{2},\frac{1}{2}) =(\frac{-3+x}{2},\frac{1+y}{2})\\\\\frac{-1}{2}=\frac{-3+x}{2},\,\frac{1}{2}=\frac{1+y}{2}\\\\-1=-3+x,\,1=1+y\\\\x=-1+3,\,y=1-1\\x=2,\,y=0$

So,

Coordinates of G = $(2,0)$

8 0

3 years ago

What is the range of the following relation?

denis23 [38]

The range of a relation is the set of the outputs of the relations.

The outputs are

$\{1, 2, 3, 4, 5\}$

And this is the range.

3 0

3 years ago

What does <br> 1/2 and 2/8 =

jeyben [28]

$\frac{1}{2} + \frac{2}{8} = \frac{1 * 4}{2 * 4} + \frac{2}{8} = \frac{4}{8} + \frac{2}{8} = \frac{6}{8} = \frac{3}{4}$

6 0

3 years ago

You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard devia

Akimi4 [234]

Answer:

673 people

Step-by-step explanation:

Statistics<3

Use the margin of error formula.

ME = t* $\frac{s}{\sqrt{n} }$

Margin of error or ME = 3
Critical t or t* with a confidence level of 95% on the calculator is invNorm(.975) = 1.96. You would use invt, except you don't have the degrees of freedom, so you can approximate with invNorm. It's close enough.
Standard deviation or s = 39.7
Solve for n!

3 = 1.96* $\frac{39.7}{\sqrt{n} }$

3/1.96 = $\frac{39.7}{\sqrt{n} }$

1.531 = $\frac{39.7}{\sqrt{n} }$

39.7/1.531 = $\sqrt{n}$

25.937 = $\sqrt{n}$

25.937^2 = $\sqrt{n}$ ^2

672.7 = n

You need at least 673 people to be confident!

4 0

3 years ago