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Natasha2012 [34]
3 years ago
7

Find the midpoint of A and B where A has coordinates (-5, 3) and B has coordinates (3,-1)

Mathematics
1 answer:
yaroslaw [1]3 years ago
5 0

Answer:

(-1, 1)

Step-by-step explanation:

Midpoint formula: (x₁ + x₂/2 , y₁ + y₂/2)

Substitute the values into the formula.

(-5 + 3/2 , 3 - 1/2)

(-2/2 , 2/2)

(-1,1)

Therefore, the midpoint is (-1, 1).

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Which expression represents the number of sides in the polygon for the nth member of the pattern?
Ira Lisetskai [31]
Given a triangle (3 sides), a hexagon (6 sides) and a nonagon (9 sides).

The sides increases by 3 and the equation that represents the pattern is 3n.

Therefore, the <span>expression that represents the number of sides in the polygon for the nth member of the pattern is 3n.</span>
5 0
3 years ago
GRADES On her first four quizzes, Rachael has earned scores of 21, 24, 23, and 17 points. What score must Rachael
Shkiper50 [21]
Answer:
20

Explanation:
For the mean to be 21, the total of the 5 numbers must be 21*5= 105

To find what the final quiz score must be, we need to subtract the first 4 scores from 105. 105- 21- 24- 23- 17= 20

We can check this answer by finding the median of the 5 numbers now (17,20,21,24,23). The new median is 21 which means the final quiz score must be 20!

Hope this helped! :)
3 0
2 years ago
Help???!!??????!??!!???!????!??
svet-max [94.6K]
x_{vertex}= \frac{-2}{2 \cdot 3}=- \frac{2}{6}=  - \frac{1}{3} \\\\\\ &#10;y_{vertex}=3 \cdot \left(- \frac{1}{3} \right)^2+2 \cdot \left(- \frac{1}{3} \right)+1=3 \cdot\frac{1}{9} -  \frac{2}{3} +1=\frac{1}{3} -  \frac{2}{3} +1= \frac{2}{3}  \\  \\  \\ \boxed {\text {Answer:} \ \left(- \frac{1}{3};  \frac{2}{3} \right)}
6 0
3 years ago
Solve the equation for y.<br> 8x – 9y = 11
pav-90 [236]
8x-9y=11

First you move the 8x because you have to leave the 9y alone

8x-9y=11
-8x        -8x

-9y=11-8x

Now you have to move the -9, so the inverse of multiplying is dividing so you divide -9.

-9y/-9= 11/-9 -8x/-9

since you can't have negative as a denominator it would be:

y= -11/9+8x/9

<span>You have to change the signs</span>
3 0
3 years ago
Joey is running an experiment with a mass on a spring. Joey models the height of the mass above the table he is working on using
galben [10]

Answer: 1.8 s

Step-by-step explanation:

Given

The height of the spring mass system above the table is given by

h(t)=6.85\cos (3.42t)+9

The mass is performing S.H.M with frequency \omega =3.42

and \omega T=2\pi

\therefore T=\dfrac{2\pi }{\omega}

time when mass returns to its original position

T=\dfrac{2\pi }{3.42}\\\\T=1.8\ s

5 0
2 years ago
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