Can someone pls help me? I NEED HELP

zubka84 [21]

We can use the two point form to find the answer:
$y1 - y2 = m(x1 - x2)$
Where y1 is the y coordinate(coordinate on the right hand side of (-9)) of the of the first coordinates, and y2 is the y coordinates of the second coordinates given (0).

While x1(-9) and x2(-6) are the x-coordinates(left hand side of the coordinates) of the coordinates given seperately.

m is the slope of the two points, and the formula is:
$\frac{y1 - y2}{x1 - x2}$
In this case:
$\frac{ - 9 - ( 0)}{ - 9 - (-6)} \\ = \frac{ - 9 }{ - 9 + 6 } \\ = \frac{ - 9}{ -3 } \\ = 3$

We can then proceed to find the eqaution by putting *one* of the points into the two-point formula.

Put (-6，0) into the formula:
-0-y = 3(-6-x)
-y = -18 - 3x
y = -(-18 - 3x)
y = 18 + 3x

Therefore the answer is y= 18+3x.

Hope it helps!

8 0

4 years ago

What is the value of 3x2 - 5xy + 5y2 for x = -6 and y = 2?

crimeas [40]

Answer is 188 3x2 - 5xy + 5y2 Now put x = -6 and y = 2 3(-6)2 - 5(-6)(2) + 5(2)2 3(36) - 5(-12) + 5(4) 108 + 60 + 20 188

4 0

4 years ago

A new shopping mall is gaining in popularity. Every day since it opened, the number of shoppers is 20%, percent more than the nu

Goshia [24]

Answer:

There were 125 shoppers on the first day.

Step-by-step explanation:

Let us call the number of shoppers on the first day $a_1$ , then on the <em>n</em>th day the number of shoppers $a_n$ is

$a_n = a_1 (1.20)^{n-1}$

which is a geometric series whose sum to the<em> n</em>th term is

$\sum_{n=0}^{n-1} a_1(r^n) = a_1\dfrac{1-r^n}{1-r}$

Now, we know that the total number of shoppers over the first 4 days is 671; therefore,

$a_1\dfrac{1-r^n}{1-r^n} = 671 $$

$a_1\dfrac{1-(1.2)^4}{1-(1.2)} = 671 $$

$a_1(5.368) = 671 $$

$a_1 = \dfrac{671}{5.368}$

$\boxed{a_1 = 125 \;people. }$

Thus, there were 125 shoppers on the first day.

7 0

3 years ago

An object is moving at a speed of 2 centimeters ever 7 seconds. express this speed in meters per week.

IgorC [24]

The speed of the object is 12121 m per week.

What does it mean to do speed?

“Speed” is a street name for various stimulant drugs that teens, young adults and others use to feel more alert and focused, and in some cases, to feel high.
Some people also use various forms of speed to reduce their appetite. Types of speed include: Amphetamines (used to treat ADHD, narcolepsy, and depression)

The object is moving at a speed of 2 centimeters every 7 seconds.

We need to find the speed in m per week.

2 cm = 0.02 m

1 week = 604800 s

7 s = $1.65 * 10^{-6} week$