3 years ago

Find the rule y=4x-1 when x =-2

Mathematics

1 answer:

Otrada [13]3 years ago

3 0

Answer:

y=-9

Step-by-step explanation:

Input the x into the equation

y=4(-2)-1

y=-8-1

y=-9

Boom.

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La ecuación de la recta que pasa por los puntos (2,-1) y (1,-5) es:

77julia77 [94]

Given:

A line passes through the points (2,-1) and (1,-5).

To find:

The equation of the line.

Solution:

If a line passes through the two points, then the equation of the line is

$y-y_1=\dfrac{y_2-y_1}{x_2-x_1}(x-x_1)$

The line passes through the points (2,-1) and (1,-5). So, the equation of the line is

$y-(-1)=\dfrac{-5-(-1)}{1-2}(x-2)$

$y+1=\dfrac{-5+1}{-1}(x-2)$

$y+1=\dfrac{-4}{-1}(x-2)$

$y+1=4(x-2)$

Using distributive property, we get

$y+1=4(x)+4(-2)$

$y+1=4x-8$

Subtract 1 from both sides.

$y+1-1=4x-8-1$

$y=4x-9$

Therefore, the correct option is B.

5 0

3 years ago

Please help! (Will mark brainlist!)

alexandr402 [8]

Answer:

0.285

Step-by-step explanation:

28.5/100 = 0.285

7 0

3 years ago

Read 2 more answers

Write an algebraic expression for each word expression. Then evaluate the expression for these values of the variable : 1/2,4,an

Yuki888 [10]

Answer:

1)p/4,2,1,1.625 2)x+1,3/2,5,7.5

Step-by-step explanation:

1) p/4

1/2 divided by 4=2

4/4=1

6.5/4=1.625

2) x+1

1/2+1=3/2

4+1=5

6.5+1=7.5

7 0

3 years ago

If 30 marbles were to divided between 7 people how much each person will get ?

kirza4 [7]

Hi,

Here is the equation.
$30 \div 7 = 4.28$
Each person would get 4.28 marbles.

Hope this helps.
r3t40

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3 years ago

From the diagram, what can you conclude about triangle CAD?

Alex

I cant see the triangle so its kinda hard to know

7 0

4 years ago