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Arturiano [62]
3 years ago
7

HELP ME WITH THIS MATH PLEASE!!

Mathematics
1 answer:
Anna007 [38]3 years ago
4 0
A. slope is rise/run. can count up 3 right 2. slope = 3/2
also by slope formula m = (y - y1)/(x - x1)

B. y-intercept is the y coordinate where the line crosses the y-axis.
See that it is at y = -4 on the graph?
To use the slope.. go backwards from the closest point (4,2) down 2 left 3 gets you to the next point (2,-1) then go down 2 left 3 again to get to y-intercept (0, -4)

C. y = (3/2)x - 4

How you get it is by putting in the values into the standard equation for a line; y = mx + b
m is slope and b is y-intercept.
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Is x= -2 a solution to 3x-6=12?
omeli [17]

Answer:

No

Step-by-step explanation:

3x - 6 = 12

3x = 18

x = 6

The only solution of the equation 3x - 6 = 12 is x = 6.

Answer: No

5 0
3 years ago
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Simplify 14<br> _<br> 8 please answer
Luden [163]

Answer:

7/4

Step-by-step explanation:

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2 years ago
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For what values of b are the vectors [−18, b, 9] and [b, b2, b] orthogonal? (Enter your answers as a comma-separated list. If an
bearhunter [10]

Answer:

Therefore the given vectors are orthogonal for b = 0,±3.

Step-by-step explanation:

If  \vec a and  \vec b are two vectors orthogonal, then the dot product of \vec a and \vec b will be zero.

i.e \vec a. \vec b =0

If  \vec a = x_1\hat i+y_1\hat j +z_1\hat k  and \vec b = x_2\hat i+y_2\hat j +z_2\hat k

\vec a. \vec b=( x_1\hat i+y_1\hat j +z_1\hat k).( x_2\hat i+y_2\hat j +z_2\hat k)

     =x_1 x_2+y_1y_2+z_1z_2

Given two vectors are (-18,b,9) and (b,b²,b)

Let

\vec P= -18 \hat i+b\hat j +9 \hat k

and

\vec Q = b \hat i+b^2 \hat j +b\hat k

Therefore,

\vec P.\vec Q

=( -18 \hat i+b\hat j +9 \hat k).( b \hat i+b^2 \hat j +b\hat k)

=(-18).b+b.b²+9.b

= -18b+b³+9b

= b³-9b

Since \vec P and \vec Q are orthogonal. Then \vec P.\vec Q = 0.

Therefore,

b³-9b= 0

⇒b(b²-9)=0

⇒b =0 or b²=9

⇒b=0 or b =±3

Therefore the given vectors are orthogonal for b = 0,±3.

8 0
3 years ago
Please please help asap right answers only
yan [13]

Answer:

top right

Step-by-step explanation:

you need at least 40 dollars and that equation is a+15 is greater than or equal to 40, which is true in this circumstance.

6 0
2 years ago
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Is this how you work this out or am I doing it wrong​
Sauron [17]
You’re doing it right
8 0
3 years ago
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