If 4y = 20 then 2y - 1 equals what number

Answers

Answer 1

Answer: $4y=20\n20/4=5\ny=5\n\n2y-1;y=5\n2*5-1\n10-1\n\boxed9\n\n\star\bowtie\star$

Answer 2

Answer: 4y = 20
y = 20 / 4
y = 5

2y - 1 = ?
2(5) - 1 = ?
10 - 1 = 9

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PLEASE HELP ME ASAP 10 POINTS

Answers

To find the surface are, we can add up the area of all of the sides.

Top:
4in x 9in = 36in^2

Bottom:
4in x 9in = 36in^2

Front:
5in x 9 in = 45in^2

Back:
5in x 9 in = 45in^2

Right:
4in x 5in = 20in^2

Left:
4in x 5in = 20in^2

Adding them all together:
36+36+45+45+20+20 = 202in^2

The surface area of the prism is 1. 202 in^2

Question #2 please. Thanks

Answers

find distances
from A to B [(3,2) to (3,7)] is dsistance of 5
from B to C [(3,7) to (8,7)] is distance of 5
it is a square
therefor
from A to B=B to C=C to D=D to A=5

find point D such that from A to D =5 and D to C=5

point is (8,2)

What is the interquartile range of this data?5

8

13

17

Answers

Lowest value: 2

Highest value: 19

Median: 8

Lower quartile: 6

Upper quartile: 14

Range: Highest value - Lowest value = answer

Range: 19 - 2 = 17

Interquartile range: Upper quartile - Lower quartile = answer

(IQR) interquartile range = 14 - 6 = 8

So the answer to your question would be 8 :)

~hope this helps, have a good day/afternoon/night~

Answer:

Step-by-step explanation:

I took the test and got it 100% right!

Complete the equation for the linear function whose graph contains the points (9, 7) and (4, –8).

Answers

Answer:

$\boxed{\boxed{y-7=3(x-9)}}$

Step-by-step explanation:

The given points are $(9, 7),(4, -8)$

We can get the line equation passing through these points by applying point slope formula.

The slope of the line joining these two points would be,

$=(y_2-y_1)/(x_2-x_1)$

$=(-8-7)/(4-9)$

$=(-15)/(-5)$

$=3$

The general point slope form of straight line is,

$y-y_1=m(x-x_1)$

Putting the slope as 3 and the point as (9, 7),

$y-7=3(x-9)$

y-7=3(x-9) or it could be y=3x-20

What is 451.568 rounded to the tenths place.

Answers

It will be 451.6 because 5 is tents place 68 is big number so u add 1 + 5 = 6
Answer 451.6

the answer would be 451.6 and its rounded to the tenth place yw hope that helps :)

Let f(x)=2/x-3. Find f^-1(x)

Answers

Answer:

Two questions:

Question 1: $f^(-1)(x)=?$ given $f(x)=(2)/(x)-3$ .

Answer 1: $f^(-1)(x)=(2)/(x+3)$

Question 2: $f^(-1)(x)=?$ given $f(x)=(2)/(x-3)$ .

Answer 2: $f^(-1)(x)=(2)/(x)+3$

Step-by-step explanation:

So $f^(-1)$ is used in most classes to represent the inverse function of $f$ .

The inverse when graphed is a reflection through the y=x line. The ordered pairs $(a,b)$ on $f$ implies $(b,a)$ are on $f^(-1)$ .

This means we really just need to swap x and y.

Since we want to write as a function of x we will need to solve for y again.

Question 1:

$y=(2)/(x)-3$

Swap x and y:

$x=(2)/(y)-3$

We want to solve for y.

Add 3 on both sides:

$x+3=(2)/(y)$

Make the left hand side a fraction so we can cross-multiply:

$(x+3)/(1)=(2)/(y)$

Cross multiply:

$y(x+3)=1(2)$

Simplify right hand side:

$y(x+3)=2$

Divide both sides by (x+3):

$y=(2)/(x+3)$

So $f^(-1)(x)=(2)/(x+3)$ .

Question 2:

$y=(2)/(x-3)$

Swap x and y:

$x=(2)/(y-3)$

Make left hand side a fraction so we can cross multiply:

$(x)/(1)=(2)/(y-3)$

Cross multiply:

$(y-3)x=1(2)$

We have to distribute here:

$yx-3x=2$

Add 3x on both sides:

$yx=2+3x$

Divide boht sides by x:

$y=(2+3x)/(x)$

You could probably stop here but you could also simplify a little.

Separate the fraction into two terms since you have 2 terms on top bottom being dividing by x:

$y=(2)/(x)+(3x)/(x)$

Simplify second fraction x/x=1:

$y=(2)/(x)+3$

So $f^(-1)(x)=(2)/(x)+3$ .

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