Answer:
a·b = 7.2
Step-by-step explanation:
Given :
IaI = 2; IbI = 4 ,
Using Dot product formula:
a·b = IaI IbI cos
a·b = (2) (4) (cos(-\pi/7[/tex])
a·b = 7.2
Hence Dot product of vector a and b i s:
a·b = 7.2
Answer:
A
The answer would be A because what is 156- 19=137 so we now take out number 2/B
137-19=118 So that means we can eliminate number 3/c that says 119 so that's out now.
And for last number the 3rd number to subtract is what is 118-19=99 so we just eliminated number 4 that says 98.
And the only number that followed our answers and ad the same answer for us was A so lets go with A.
Hope this helps have a great day:)
Answer:
x= 5/4 ; y= -7/4
Step-by-step explanation:
I will solve your system by substitution.
(You can also solve this system by elimination.)
3x+y=2;5x−y=8
Step: Solve3x+y=2for y:
3x+y+−3x=2+−3x(Add -3x to both sides)
y=−3x+2
Step: Substitute−3x+2foryin5x−y=8:
5x−y=8
5x−(−3x+2)=8
8x−2=8(Simplify both sides of the equation)
8x−2+2=8+2(Add 2 to both sides)
8x=10
8x
8
=
10
8
(Divide both sides by 8)
x=
5
4
Step: Substitute
5
4
forxiny=−3x+2:
y=−3x+2
y=−3(
5
4
)+2
y=
−7
4
(Simplify both sides of the equation)
Answer:
x=
5
4
and y=
−7
4
Answer:
Hi there!
Your answer is:
81
Step-by-step explanation:
First, simplify within parentheses.
-4-3-2 = -7-2 = -9
(-9)^2
The negative is within the parentheses, so it goes away when squared
(-9)^2 = -9× -9= 81
Hope this helps
Answer:
(4, 2)
Step-by-step explanation:
( x,y) -----} ( x,-y)