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3 years ago

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Which of the following are ordered pairs for the equation y = -4x + 5? (0,5) (1,1) (-1,9) (0,5) (-1,-1) (-1,-9) (0,5) (1,-1) (-1

,9) (0,5) (-1,1) (-1,-9)

1 answer:

Brut [27]3 years ago

5 0

The first one is your answer because if you plug into the cal it shows the x and y table and it shows that the first one is correct.

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It for math and we urge learning about slopes. I don’t know really how to find the slope of a line

kykrilka [37]

Step-by-step explanation:

Get a line of which you want to know the slope.

Pick any two coordinates that the line goes through.

Subtract the two y-coordinates from one another.

Subtract the two x-coordinates from one another.

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3 years ago

7. A cheetah ran 300 feet in 2.92 seconds. What was the cheetah’s average speed in miles per hour? Show your work.

ANTONII [103]

300 feet * mile / 5,280 feet = <span> <span> <span> 0.0568181818 </span> </span> </span> miles

2.92 seconds * hour / 3,600 seconds = <span> <span> <span> 0.0008111111 </span> </span> </span> hours

<span> <span> 0.0568181818 </span> </span> miles / <span> <span> 0.0008111111 </span> </span> hours =
<span> <span> <span> 70.0498132005 </span> </span> </span> miles per hour

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2 years ago

If the coefficient of determination is 0.25 and the sum of squares residual is 180, then what is the value of SSY?

Gennadij [26K]

Answer:

And then $SSY=SS_{total}=\sum_{j=1}^n (y_j-\bar y)^2 =240$

C. 240

Step-by-step explanation:

Previous concepts

Analysis of variance (ANOVA) "is used to analyze the differences among group means in a sample".

The sum of squares "is the sum of the square of variation, where variation is defined as the spread between each individual value and the grand mean"

When we conduct a multiple regression we want to know about the relationship between several independent or predictor variables and a dependent or criterion variable.

If we assume that we have $k$ independent variables and we have $j=1,\dots,j$ individuals, we can define the following formulas of variation:

$SS_{total}=\sum_{j=1}^n (y_j-\bar y)^2$

$SS_{regression}=SS_{model}=\sum_{j=1}^n (\hat y_{j}-\bar y)^2$

$SS_{error}=\sum_{j=1}^n (y_{j}-\hat y_j)^2 =180$

And we have this property

$SST==SSY=SS_{regression}+SS_{error}=SSR+180$

If we solve for SSR we got:

$SSR= SSY-180$ (1)

And we know that the determination coefficient is given by:

$R^2 = \frac{SSR}{SSY}$

We know the value os $R^2= 0.25$ and we can replace SSR in terms of SSY with the equation (1)

$R^2 =0.25= \frac{SSY-180}{SSY}= 1-\frac{180}{SSY}$

And solving SSY we got:

$\frac{180}{SSY}=1-0.25=0.75$

$SSY= \frac{180}{0.75}=240$

And then $SSY=SS_{total}=\sum_{j=1}^n (y_j-\bar y)^2 =240$

C. 240

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3 years ago

What value of x makes the equation 3^(x-5)=27^(x+4) true?

SVEN [57.7K]

Answer:

The attached file contains the solution to the question

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1 year ago

A length of string that is 240 cm long is cut into three pieces the second piece is 25% longer than the first piece the third pi

Tresset [83]

Hey there,
Let's say that the first piece is x cm
1st = x
2nd = x + 25%
3rd = x - 25%
100% = 240 cm
1% = 240 / 100
= 2.4cm
x + x + 25 + x - 25 = 100
3x + 25 - 25 = 100
3x = 100 - 25 + 25
3x = 100
3x = 240 cm
x = 240 / 3
= 80 cm
1st piece = 80 cm
2nd piece = 80 + (25% x 80)
= 80 + 20
= 100cm
3rd piece = 80 cm - (25% x 80)
= 80 cm - 20
= 60cm

Hope this helps :))

<em>~Top♥</em>

6 0

2 years ago

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