<span>They don't know they should stretch.</span>
The answer is 30. The three is in the tens place, representing 30.
The answer is 8, I got this question a long time ago so I know if wrong please tell me.
Answer:
<11,33>
Step-by-step explanation:
If it is perpendicular to <3,-1> We can use <0,0> as the other point to get the slope
m = (y2-y1)/(x2-x2)
The slope of the vector is
(-1-0)/(3-0)
= -1/3
Then we want a vector perpendicular, so we take the negative reciprocal of the slope
- (-3/1) =3
So the perpendicular slope is 3
Our new vector y/x = 3/1
Using cross products
3x=y
The magnitude has to be 11 sqrt (10)
magnitude = sqrt( ((x)^2 + y^2) = 11sqrt(10)
magnitude = sqrt( ((x^2 + y^2) = 11sqrt(10)
Square both sides
x^2+y^2 = 11^2*10
x^2 + y^2 =1210
We have 2 equations and 2 unknowns
x^2 +y^2 =1210 and
3x=y
Replace y with 3x
x^2 + (3x)^2 =1210
x^2 +9x^2 =1210
10x^2 =1210
Divide both sides by 10
x^2 =121
Take the square root of each side
sqrt(x^2) = sqrt(121)
x=±11
But it problems states it has to be in the first quadrant so x=11
x =11
Now we can find y
y =3x
y =11*3
y =33
The vector is <11, 33>
Answer:
You have an empty box which is 1,800 grams. After you put the books in, it's 9 kilograms. There are 9,000 grams in 9 kilograms, and 1,800 grams were already there before you put the books.. so just do 9,000 - 1,800 which equals 7,200. Then divide 7,200 by 4, because there are 4 books with equal mass.
Step-by-step explanation: