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3 years ago

Which is the graph of y = Lx] -2?

Mathematics

1 answer:

Dimas [21]3 years ago

7 0

Answer:

Graph the line using the slop and y-intercept, or two points.

Slope: 1

y-intercept: -2

x: 0, 0

y: -2, -2

(Sorry is this isn't the answer you are looking for)

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A studio apartment has a floor that measures 80 feet by 64 feet. A scale drawing of the floor on grid paper uses a scale of 1 un

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10 units by 6.4 units

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3 years ago

A particular brand of dishwasher soap is sold in three sizes: 25 oz, 40 oz, and 65 oz. Twenty percent of all purchasers select a

Elodia [21]

Answer:

Step-by-step explanation:

Given that:

There are 3 sizes of dishwasher soaps.

Twenty percent of all purchasers select a 25-oz box, 50% select a 40-oz box, and the remaining 30% choose a 65-oz box. Let X1 and X2 denote the package sizes selected by two independently selected purchasers.

Therefore, $3 \times 3 = 9$ random samples of size 2 are taken from the population.

The information is well represented in the table below.

$x_1$ $x_2$ $p(x_1 \ x_2) = p(x_1)p(x_2)$ $\bar x = \dfrac{x_1+x_2}{2}$ $s^2= (x_1-\bar x)^2 +(x_2-\bar x)^2$

25 25 0.20×0.20=0.04 25 0

25 40 0.20×0.50=0.10 32.5 112.5

25 65 0.20×0.30= 0.06 45 800

40 25 0.50×0.20=0.10 32.5 112.5

40 40 0.50×0.50=0.25 40 0

40 65 0.50×0.30=0.15 52.5 312.5

65 25 0.30×0.20=0.06 45 800

65 40 0.30×0.50=0.15 52.5 312.5

65 65 0.30×0.30=0.09 65 0

The sample distribution of $\bar x$ is shown below as ;

$\bar x$ 25 32.5 40 45 52.5 65

$p(\bar x)$ 0.04 0.10+0.10 0.25 0.06+0.06 0.15+0.15 0.09

= 0.20 =0.12 =0.30

The value of $E(\bar x) = \sum \bar x \ P(\bar x)$

= 25(0.04) + 32.5(0.20) + 40(0.25) + 45(0.12) + 52.5(0.30) + 65(0.09)

= 44.5 oz

From the same table above ;

the sampling distribution of ${s^2}$ is be shown below;

${s^2}$ 0 112.5 312.5 800

0.04+0.25 0.10+0.10 0.15+0.15 0.06+0.06

+0.09

$p(s)^2$ = 0.38 =0.20 = 0.30 0.12

The value of $E(s)^2 =\sum s^2 .p(s)^2$

= (0×0.38)+(112.5×0.20)+(312.5×0.30)+(800×0.12)

=0+112+93.75+96

=301.75

5 0

3 years ago

Find the vertex of the parabola whose equation is y=-2x^2+8x-5. (2,27), (2,19), (2,3)

Basile [38]

Answer:

Vertex of the parabola is (2,3)

Step-by-step explanation:

The parabola is a negative, it opens down and the maximum place it can reach is 3 (y).

4 0

3 years ago

Write y= x^2 - 4x + 6 in vertex form . NEED ASAP!! please !!

worty [1.4K]

First, complete the square.
y = (x^2 - 4x + 4) + 2
y = (x - 2)^2 + 2
There you go. Have a nice day! :)

6 0

3 years ago

A boat crew rowed 10.5 miles downstream, with the current, in 1.5 hours. the return trip upstream , against the current , covere

alukav5142 [94]

Answer:

The speed of the boat is 5 miles per hours

The speed of the current is 2 miles per hours .

Step-by-step explanation:

Given as :

The distance cover by boat downstream = D = 10.5 miles

The time taken by boat to cover D distance = T = 1.5 hours

The distance cover by boat Upstream = d = 10.5 miles

The time taken by boat to cover d distance = t = 3.5 hours

Let The speed of boat = x mph

Let The speed of current = mph

Now, According to question

∵ Speed = $\dfrac{Distance}{Time}$

<u>For Downstream</u>

x + y = $\dfrac{D}{T}$

Or, x + y = $\dfrac{10.5}{1.5}$

Or, x + y = 7 .......A

<u>For Upstream</u>

x - y = $\dfrac{d}{t}$

Or, x - y = $\dfrac{10.5}{3.5}$

Or, x - y = 3 .......B

Now, Solving eq A and eq B

So, (x + y) + (x - y) = 7 + 3

Or, (x + x) + (y - y) = 10

Or, 2 x + 0 = 10

∴ x = $\dfrac{10}{2}$

i.e x = 5 mph

So, The speed of the boat = x = 5 miles per hours

Put the value of x into eq A

∵ x + y = 7

Or, 5 + y = 7

∴ y = 7 - 5

i.e y = 2 mph

So, The speed of the current = y = 2 miles per hours

Hence, The speed of the boat is 5 miles per hours and The speed of the current is 2 miles per hours . Answer

7 0

3 years ago