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vitfil [10]
4 years ago
7

Please do not answer unless you are correct..I will award double points

Mathematics
1 answer:
Sophie [7]4 years ago
8 0
The dot product of two orthogonal vectors is always zero. 

Vector u can be expressed (-5,-3) as its ends on this points and starts from origin. The dot product of vector u with vector given in option A results in zero.

(-5, -3) · (1/5, -1/3)

= -5(1/5) + (-3)(-1/3)

= - 1 + 1

= 0 

Hence first option is the correct answer
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Someone please help thank you!!!!
Ratling [72]

"The perimeter P..." gives us one variable to work with.

"is" in this context almost always means "equals".

"the sum" we know we will be adding.

"twice the length l" gives us a variable and a coefficient.

"twice the width w" gives us a variable and a coefficient.

The equation for this is P=2l+2w

I hope in the future you can remember these tips! :)

8 0
4 years ago
What equation can be used to find the value of x
Gnom [1K]

Answer:

3x + 1 + 5x - 7 + 11x - 4 = 180°

x = 10°

Step-by-step explanation:

Sum of angle in Triangle = 180°

So lets add up the angles with combining like terms.

3x + 1 + 5x - 7 + 11x - 4 = 180°

19x + 1 - 7 - 4 = 180°

19x - 10 = 180°

19x = 190

x = 10°

If my answer is incorrect, pls correct me!

If you like my answer and explanation, mark me as brainliest!

-Chetan K

7 0
3 years ago
Please help this is so confusing to me
Stels [109]

First multiply C by F by multiplying each row in C by each column in F:

12 * -2 + 0*0 + 1.5*2   12*0 + 0*8 + 1.5*1

1*-2 -6*0 +7.2       1*0-6*8 +7*1


to get a matrix of:

-21   1.5

12   -41


Now subtract that matrix from B:


2- -21 = 2+21 = 23

8 - 1.5 = 6.5

0.6 - 12 = -11.4

3 - -41 = 3+41 = 44


So you have:

23   6.5

-11.4   44


Which makes C the correct answer.

         

6 0
4 years ago
Solve for x in this linear equation: -30 + 30x = 4(3 + 4x).
DIA [1.3K]
Your answer should be 12+16x
7 0
3 years ago
Raymond bought a used truck for $18,800. If the sales tax in his state is 7 percent, what was the final price for his car?
blondinia [14]

Answer:

$1316

Step-by-step explanation: You would multiply 18,800 by 0.07  and Your would get $1316

4 0
3 years ago
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