In Exercises 15−18, let W be the set of all vectors of the form shown, where a , b , and c represent arbitrary real numbers. In each case, either find a set S of vectors that spans W or give an example to show that W is not a vector space. 15 . [ 3 a + b 4 a − 5 b ]
In Exercises 15−18, let W be the set of all vectors of the form shown, where a , b , and c represent arbitrary real numbers. In each case, either find a set S of vectors that spans W or give an example to show that W is not a vector space. 15 . [ 3 a + b 4 a − 5 b ]
In Exercises 15−18, let W be the set of all vectors of the form shown, where a, b, and c represent arbitrary real numbers. In each case, either find a set S of vectors that spans W or give an example to show that W is not a vector space.
15.
[
3
a
+
b
4
a
−
5
b
]
Quantities that have magnitude and direction but not position. Some examples of vectors are velocity, displacement, acceleration, and force. They are sometimes called Euclidean or spatial vectors.
Solve the equation. Write the smaller
answer first.
2
(x-6)²
= 36
x =
Α
x =
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Write a quadratic equation in
factored form that has solutions of x
=
2 and x = = -3/5
○ a) (x-2)(5x + 3) = 0
○ b) (x + 2)(3x-5) = 0
O
c) (x + 2)(5x -3) = 0
○ d) (x-2)(3x + 5) = 0
A vacant lot is being converted into a
community garden. The garden and a
walkway around its perimeter have
an area of 690 square feet. Find the
width of the walkway (x) if the garden
measures 14 feet wide by 18 feet
long. Write answer to 2 decimal
places. (Write the number without
units).
Hint: add 2x to each of the garden
dimensions of 14 x 18 feet to get the
total area for the length multiplied by
width.
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