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2 years ago

NEED HELP ASAP!!!!!!!!!!!!!!!!!! I'll give Brainliest to whoever can answer all questions :)))

Mathematics

2 answers:

miv72 [106K]2 years ago

8 0

Answer:

the first question would be y= -1/4x + 8

the second one would be 3x + 5y = -65

the third one would be y= -2

and last but not least... the last one would be b.

Step-by-step explanation:

wel2 years ago

5 0

A- y= -1/4x+8
B- 3x+5y=-65
C- y=-2
D- B
Good luck :)

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5 times as many stakes

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The chart shows the low temperature each day in International Falls, Minnesota, during the month of February 2009. What was the

Nastasia [14]

Answer:

The median is -8°F

Step-by-step explanation:

Attached Table.

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Looking at the table, we need to arrange the numbers (first week numbers) from least to greatest.

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Find the product of all real values of r for which 1/2x=r-x/7

Dahasolnce [82]

Answer:

$r = \±\sqrt{14$

$Product = -14$

Step-by-step explanation:

Given

$\frac{1}{2x} = \frac{r - x}{7}$

Required

Find all product of real values that satisfy the equation

$\frac{1}{2x} = \frac{r - x}{7}$

Cross multiply:

$2x(r - x) = 7 * 1$

$2xr - 2x^2 = 7$

Subtract 7 from both sides

$2xr - 2x^2 -7= 7 -7$

$2xr - 2x^2 -7= 0$

Reorder

$- 2x^2+ 2xr -7= 0$

Multiply through by -1

$2x^2 - 2xr +7= 0$

The above represents a quadratic equation and as such could take either of the following conditions.

(1) No real roots:

This possibility does not apply in this case as such, would not be considered.

(2) One real root

This is true if

$b^2 - 4ac = 0$

For a quadratic equation

$ax^2 + bx + c = 0$

By comparison with $2x^2 - 2xr +7= 0$

$a = 2$

$b = -2r$

$c =7$

Substitute these values in $b^2 - 4ac = 0$

$(-2r)^2 - 4 * 2 * 7 = 0$

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Add 56 to both sides

$4r^2 - 56 + 56= 0 + 56$

$4r^2 = 56$

Divide through by 4

$r^2 = 14$

Take square roots

$\sqrt{r^2} = \±\sqrt{14$

$r = \±\sqrt{14$

Hence, the possible values of r are:

$\sqrt{14$ or $-\sqrt{14$

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$Product = \sqrt{14} * -\sqrt{14}$

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2 years ago

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bezimeni [28]

It most common to round to the hundredths place, this is two spaces after the decimal.

So look two spaces right - 0.17. If the third digit (in this case 6) is higher than 5 you round the number up if its not, keep it the same.

"6" is greater than five, so round it to about (or approximately) 0.18.

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