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3 years ago

Wanda shops for books during a 20% off sale.

Mathematics

2 answers:

olga55 [171]3 years ago

8 0

Answer: mark brainliest im grinding ranks

Step-by-step explanation:

babymother [125]3 years ago

7 0

Answer:

I am confused can you explain a little more

Step-by-step explanation:

You might be interested in

Write an equation for the vertical line that contains point E(-12, 7). Is anybody able to help?

BigorU [14]

Answer:

$x = -12$

Step-by-step explanation:

Vertical lines take the form of $x = something$ and horizontal lines take the form of $y = something$

Why is this? Notice that whenever you make a horizontal line on a graph and select virtually any point that's on that line, all of the points you pick will have the same y value. Try to imagine the same thing with a vertical line, are the results the same?

So the line $x = -12$ (we got -12 from the coordinate that was given to us on the question prompt) is a vertical line that passes through virtually all possible y values (from positive infinity to negative infinity, or vice-versa) which means that the question prompt having given us the y value was negligible.

Good luck!

5 0

2 years ago

If p=(-3,-2) and q=(1,6) are the endpoints of the diameter of a circle find the equation of the circle

stira [4]

Answer:

The equation of the circle (x +1) )² +(y-(2))² = (2(√5))²

 or 

The equation of the circle x² + 2 x + y² - 4 y = 15

Step-by-step explanation:

Given points end Points are p(-3,-2) and q( 1,6)

The distance of two points formula

P Q = $\sqrt{x_{2} - x_{1})^{2} + ((y_{2} -y_{1})^{2} }$

P Q = $\sqrt{1 - (-3)^{2} + ((6 -(-2))^{2} }$

P Q = $\sqrt{16+64} = \sqrt{80}$

The diameter 'd' = 2 r

2 r = √80

= $\sqrt{16 X 5}$

= $4 \sqrt{5}$

r = 2√5

Mid-point of two end points

$(\frac{x_{1} + x_{2} }{2} , \frac{y_{1} +y_{2} }{2} ) = (\frac{-3+1}{2} ,\frac{-2 +6}{2} )$

= (-1 ,2)

Mid-point of two end points = center of the circle

(h,k) = (-1 , 2)

The equation of the circle

(x -h )² +(y-k)² = r²

(x -(-1) )² +(y-(2))² = (2(√5))²

x² + 2 x + 1 + y² - 4 y + 4 = 20

x² + 2 x + y² - 4 y = 20 -5

x² + 2 x + y² - 4 y = 15

Final answer:-

The equation of the circle (x +1) )² +(y-(2))² = (2(√5))²

 or 

The equation of the circle x² + 2 x + y² - 4 y = 15

6 0

3 years ago

dangina [55]

Answer:

$3w+10>2w+15$

Step-by-step explanation:

If Jerry initially releases 10 videos a week and creates an additional 3 each week, he will create a total of $3w+10$ videos, where $w$ is the number of weeks. If Martin initially releases 15 videos a week and creates an additional 2 each week, he will create a total of $2w+10$ videos, since $w$ is maintained. Therefore, the inequality $\fbox{$3w+10>2w+15$}$ can be used to find who creates more videos, where $w$ is the number of weeks.