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3 years ago

The equation of the line of best fit of a scatterplot is y = -8x + 3. What is the y-intercept?

Mathematics

1 answer:

aivan3 [116]3 years ago

3 0

Answer:

8 is the answer

Step-by-step explanation:

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An inlet pipe on a swimming pool can be used to fill the pool in 33 hours. The drain pipe can be used to empty the pool in 34 ho

Talja [164]

Answer:

An inlet pipe on a swimming pool can be used to fill the pool in 33 hours. Time it will take to fill the pool = 748 hrs

Solution:

Let x = time it will take to fill the pool

$\frac{1}{33}$ = work rate of inlet pipe

$\frac{1}{34}$ = work rate of drain pipe

Using the formulae

Volume of flow=work rate $\times$ time

Let us assume complete time of pool to fill = 1

Remaining fraction of pool to be filled = $1-\frac{1}{3}=\frac{2}{3}$

$\begin{array}{l}{\frac{1}{33} x-\frac{1}{34} x=\frac{2}{3}} \\\\ {\frac{x}{33}-\frac{x}{34}=\frac{2}{3}}\end{array}$

$\frac{34 x-33 x}{33 \times 34}=\frac{2}{3}$

$34 x-33 x=\frac{2 \times 34 \times 33}{3}$

$\begin{array}{l}{x=\frac{2244}{3}} \\\\ {x=\frac{3168}{3}} \\\\ {x=748}\end{array}$

Time it will take to fill the pool = 748 hrs

5 0

3 years ago

GOT A BUNCH OF UNANSWERED QUESTIONS THAT NEED ANSWERING ON MY PROFILE

Sati [7]

Answer:

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3 years ago

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Simply the expression 3(2x+y)

Damm [24]

Answer:

6x + 3y

Step-by-step explanation:

3(2x + y)

6x + 3y

Bet of Luck!

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3 years ago

Find the factor of 30

Citrus2011 [14]

Step-by-step explanation:

The factors of number 30 are 1, 2, 3, 5, 6, 10, 15 and 30.

hope it helps!

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Please I need help Please!! Solve for x

qwelly [4]

Answer:

21+9=27+x

30=27+x

30-27=x

x = 3

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3 years ago