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3 years ago

Which expression is equivalent to (-4-x)-(3y-9x)

2 answers:

6 0

Basically, you just need to simplify it first, then combine like terms.
(-4-x)-(3y-9x)
= -4 - x - (3y - 9x)
= -4 - x + -1(3y) + -1 (-9x)
= -4 + -x + -1(3y) + -1(-9x)
= -4 + -x + -3y + 9x
= (-x + -9x) + (-3y) + (-4)
= 8x + (-3y) + (-4)
= 8x - 3y - 4

Nookie1986 [14]3 years ago

3 0

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What is the sum of the last four terms of the series 7+9+11+...21

Sidana [21]

For sake of convenience, reverse the series, then it would be:

21,19,17.....7

a=21, d = -2,

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s(4)=2(36)

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3 years ago

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3 years ago

What is the exact distance from (-5,1) to (3,0).

Ilya [14]

Answer:

The distance between the two points is $\sqrt{65} \ \text{units}.$

Step-by-step explanation:

In order to find the distance between two coordinate pairs, we can use the distance formula:

$\displaystyle \bullet \ \ \ d = \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

Our coordinate pairs need to be labeled accordingly, so we can use this naming system:

$\bullet \ \ \ (x_1, y_1), (x_2, y_2)$

This assigns a name to our points:

$x_1 = -5$
$y_1 = 1$
$x_2 = 3$
$y_2 = 0$

Therefore, we can plug these into the formula and solve:

$d=\sqrt{(3-(-5))^2+(0-1)^2}\\\\d=\sqrt{(8)^2+(-1)^2}\\\\d=\sqrt{8^2+1^2}\\\\d=\sqrt{64+1}\\\\d=\sqrt{65}$

Therefore, the distance between the two points is $\sqrt{65} \ \text{units}$ .

5 0

2 years ago

Easy & brainliest

7nadin3 [17]

Answer: -2(10xy+4y-13)

Step-by-step explanation: Factor the polnomial.

Hope this helps you out.

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3 years ago

What do you do to the b value to correctly complete the square?

mash [69]

Answer:

Step-by-step explanation:

B is correct: We Divide it (the coefficient b) by 2 and square the result.

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2 years ago

Read 2 more answers