Answer:

Step-by-step explanation:
2)
a) elimination method
b) substitution method
c) substitution method
For the first part we can elimate the y variable by subtracting the equations. We can then find the value of x.
For the second part we can substitute y as 2x+5 in the second equation and solve for x.
For the third part we can substitute y as 4x+3 in the first equation and solve for x.
3)

The answer is less than :)
X = 16y^2 + 1
x - 1 = 16y^2
(x - 1)/16 = y^ 2
( (x-1) / 16 ) ^1/2 = y
( (x-1) ^ 1/2 ) / 4 = y
Answer:
Step-by-step explanation:
we have to find the dot product here.
From the formula of dot product of vectors,
we know-
if X=<a,b,c> and Y=<d,e,f>
Then dot product of X and Y is-
X.Y=ad+be+cf
Here, we get
v=<2 , -8 , -8>
and w=<-2 , 6 , -5>
So, the dot product is-
v . w=2(-2)+(-8)(6)+(-8)(-5)
=-4-48+40
=-52+40
=-12
So,
v . w= -12
Step-by-step explanation:
<h3>
<em><u>2</u></em><em><u>-</u></em><em><u>3</u></em><em><u>=</u></em><em><u>0</u></em></h3>
<em><u>2</u></em><em><u>2</u></em><em><u>=</u></em><em><u>9</u></em>
<em><u>2</u></em><em><u>-</u></em><em><u>9</u></em><em><u>=</u></em><em><u>0</u></em>
<em><u>2</u></em><em><u>+</u></em><em><u>3</u></em><em><u>2</u></em><em><u>=</u></em><em><u>0</u></em>