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3 years ago

3 pounds to 24 ounces (ratios)

Mathematics

2 answers:

Sauron [17]3 years ago

8 0

Answer:

If you want to put that in a ratio its simply 3:24

Step-by-step explanation:

777dan777 [17]3 years ago

8 0

3:24 as simple as that

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Find the least squares regression equation using the school year (in number of years after 2000) for the input variable and the

Ad libitum [116K]

Answer-

The least squares regression equation using the school year (in number of years after 2000) for the input variable and the average cost (in thousands of dollars) for the output variable is "y=0.937x+12.765" .

Solution-

The independent variable / input variable= x = Number of years after 2000 ( = year-2000)

The dependent variable / output variable = y = Average cost in thousands of dollars

(The table has been attached herewith.)

To find the regression equation for a group of (x,y) points,

We have to calculate the slope and y-intercept, then we can put those values in the equation y = mx + c ( Slope - Intercept formula)

We know that,

$Slope=m=\frac{N\sum xy -\sum x\sum y}{N\sum x^{2}- (\sum x)^{2}}$

Putting the values from the table,

$m=\frac{(8 \times 1020.206)-(52 \times 150.894)}{(8 \times 3810)-(52^2)}$

( ∵ Instead of 150,894 we have to put 150.894 as we have find the line for year and thousands of dollars )

$\Rightarrow m =\frac{8161.648-7846.488}{3040-2704} =\frac{315.16}{336}=0.937$

Now, for the y-intercept,

$c =\frac{\sum y -m(\sum x)}{N}$

Putting the values,

$c=\frac{150.894-(52 \times 0.937)}{8}=\frac{102.125}{8}=12.765$

Now, putting the values of c and m, in the Slope-Intercept formula,

$y=0.937x+12.765$

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3 years ago

How many quarters are in $375.75?

DanielleElmas [232]

Answer:

1503 quarters

Step-by-step explanation:

There are 4 quarters in 1 dollar, so we multiply this number by 4.

375.75 * 4 = 1503

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3 years ago

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1)35% of _____is 42. 2)92% of_____ is 115.

dangina [55]

35% of 120 is 42. (42/32 then multiply that by 100)

92% of 125 is 115. (115/92 then multiply that by 100)

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