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4 years ago

What is 2x-4y=20 for y

1 answer:

8 0

Okay so you need to get the y by itself

2x - 4y = 20

subtract the 2x over

-4y = -2x + 20

divide everything by -4

y = 1/2x - 5 <------- this is your answer

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AveGali [126]

Answer:

AB XY

Step-by-step explanation:

They are congruent side angles

3 0

3 years ago

25. Save the simultaneous equations 2x-y=4;x+y=5

Gnoma [55]

Answer:

Step-by-step explanation:

2x-y=4 ..........(1)

x+y=5 ...........(2)

<u>Add equation 1 and 2:</u>

We get:

3x=9

x=9/3

x=3

Substitute value of x in (2):

x+y=5

3+y=5

y=5-3

y=2

(3,2)

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3 years ago

A population is normally distributed with mean 18 and standard deviation 1.7. (a) Find the intervals representing one, two, and

elena55 [62]

Answer:

Interval within 1 standard deviation: (16.3,19.7)

Interval within 2 standard deviation: (14.6, 21.4)

Interval within 3 standard deviation: (12.9, 23.1)

Step-by-step explanation:

We are given the following in the question:

Population mean, $\mu$ = 18

Standard deviation, $\sigma$ = 1.7

We have to find the following intervals:

Interval within 1 standard deviation:

$\mu \pm 1\sigma\\=18 \pm 1.7\\=(16.3, 19.7)$

Interval within 2 standard deviation:

$\mu \pm 2\sigma\\=18 \pm 2(1.7)\\= 18 \pm 3.4\\=(14.6,21.4)$

Interval within 3 standard deviation:

$\mu \pm 3\sigma\\=18 \pm 2(1.7)\\= 18 \pm 5.1\\=(12.9,23.1)$

6 0

4 years ago

If the x-intercept is 7, the point version would be written as (answer)

saul85 [17]

Answer:

(7,0)

Step-by-step explanation:

The x intercept is the x value when y = 0

(7,0)

8 0

2 years ago

Y=2x-4 what is say the y intercept?

Afina-wow [57]

Answer:

-4

Step-by-step explanation:

The number that is by itself is always the y-intercept

5 0

3 years ago