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2 years ago

Help me with question number 3 please!!!

Mathematics

1 answer:

grin007 [14]2 years ago

5 0

Answer: please mark brainlyest

Step-by-step explanation:

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(Please help)Choose the correct answer and please explanation each (Brainliest)

Vesnalui [34]

Answer:

1. C

2. D

3. C

Explanation:

1. Girls = 12 plus twice the number of boys, so C. y = 12 + 2x.

2. You have to see which point has the second value being greater than the first value:

A) -1 > -2 is not true

B) 0 > 1 is not true

C) 2 > 3 is not true

D) 8 > 4 is true, so it's D

3. Add the two values and see if it's less than 5

A) -1-4 < 5 is true

B) 0 + 4 < 5 is true

C) 1 + 7 < 5 is not true, so this is the answer

D) 2 + 2 < 5 is true

3 0

2 years ago

1. Write the standard form of the line that passes through the given points. (7, -3) and (4, -8)

Sveta_85 [38]

Answer:

1. $-5x+3y+44=0$

2. $2x+y-2=0$

3. $2x+y-4=0$

Step-by-step explanation:

Standard form of a line is $Ax+By+C=0$ .

If a line passing through two points then the equation of line is

$y-y_1=m(x-x_1)$

where, m is slope, i.e., $m=\dfrac{y_2-y_1}{x_2-x_1}$ .

The line passes through the points (7,-3) and (4,-8). So, the equation of line is

$y-(-3)=\dfrac{-8-(-3)}{4-7}(x-7)$

$y+3=\dfrac{-5}{-3}(x-7)$

$y+3=\dfrac{5}{3}(x-7)$

$3(y+3)=5(x-7)$

$3y+9=5x-35$

$-5x+3y+9+35=0$

$-5x+3y+44=0$

Therefore, the required equation is $-5x+3y+44=0$ .

We need to find the equation of the line, in standard form, that has a y-intercept of 2 and is parallel to $2 x + y =-5$ .

Slope of the line : $m=\dfrac{-\text{Coefficient of x}}{\text{Coefficient of y}}=\dfrac{-2}{1}=-2$

Slope of parallel lines are equal. So, the slope of required line is -2 and it passes through the point (0,2).

Equation of line is

$y-2=-2(x-0)$

$y-2=-2x$

$2x+y-2=0$

Therefore, the required equation is $2x+y-2=0$ .

We need to find the equation of the line, in standard form, that has an x-intercept of 2 and is parallel to $2x + y =-5$ .

From part 2, the slope of this line is -2. So, slope of required line is -2 and it passes through the point (2,0).

Equation of line is

$y-0=-2(x-2)$

$y=-2x+4$

$2x+y-4=0$

Therefore, the required equation is $2x+y-4=0$ .

5 0

2 years ago

Tell whether this statement is sometimes, always, or never true. Identify the answer with a sketch. If B is a point between A an

Ksivusya [100]

The statement is always true

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2 years ago

Factor the trinomial by using the factor X method 3n-8n+4

Alex73 [517]

3n² - 8n + 4
3n² - 6n - 2n + 4
(3n - 2)(n - 2)

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3 years ago

Please help immediately this is 2 days late

laiz [17]

Answer:

Step-by-step explanation:

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2 years ago