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erik [133]
3 years ago
12

I need some help please

Mathematics
1 answer:
AleksandrR [38]3 years ago
8 0

Answer:

gimme points

Step-by-step explanation:

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If (2,3) is reflected over the y axis what is the new coordinates
Andrei [34K]

Answer:

(-2,3)

Step-by-step explanation:

When you reflect a point across the y-axis, the y-coordinate remains the same, but the x-coordinate is transformed into its opposite (its sign is changed). Notice that B is 5 horizontal units to the right of the y-axis, and B' is 5 horizontal units to the left of the y-axis. the y-axis is the point (-x,y).

3 0
3 years ago
What is the standard form of the equation of a circle whose diameter is 20 units and whose center is (−1,7)?
VARVARA [1.3K]

Answer:

(x + 1)^2 + (y - 7)^2 = 100

Step-by-sep explanation:

Given:

Diameter of circle = 20 units

Center of circle = (-1, 7)

Standard form of the equation of a circle is expressed in the center-radius form as:

(x - h)^2 + (y - k)^2 = r^2,

Where,

h = -1

k = 7

r = ½ of diameter = ½(20) = 10 units

Plug in the values into the equation

(x - h)^2 + (y - k)^2 = r^2

(x - (-1))^2 + (y - 7)^2 = 10^2

(x + 1)^2 + (y - 7)^2 = 100

4 0
3 years ago
A treatment is administered to a sample of n = 9 individuals selected from a population with a mean of µ = 80 and a standard dev
stepan [7]

Answer:

a) M =82

Step-by-step explanation:

Let´s study this as a Normal distribution.

As we know in a normal distribution the z score is = (X-μ)/(sd/sqrt(n))

where

X = mean for the taken sample = What we want to know in this problem

μ = Total population mean =80

sd= standard deviation= 12

n = sample size=9

So in this case z=( X-80)/(12/sqr(9))= (X-80)/4

also we know that the effect size taken by the machine is 0.5, which is the same as the z-score

so...

0.5 = (X-80)/4 => 0.5*4 = X-80

2+80 = X

X = 82

4 0
3 years ago
In a flower garden, there are 3 tulips for every 8 daisies. If there are 18 tulips, how many daisies are there?
LenaWriter [7]
18/3 = 6
So 8*6 = 48
There will be 48 daisies
6 0
3 years ago
Read 2 more answers
PLZ HELP ASAP SOLID GEOMETRY
Vera_Pavlovna [14]
Volume of the cylinder can be calculated as:

V=πr²h

Radius = r = 4
Height = h = 7
π = 3.14

Using the values, we get:

V = 3.14 (16) (7) = 351.68 cubic units

So the answer to this question is 351.68
7 0
3 years ago
Read 2 more answers
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