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4 years ago

Determine whether the vectors u and v are parallel, orthogonal, or neither.

1 answer:

6 0

For this case we have the following vectors:
u = (9, 0)
v = (0, -9)
Using product point we have:
u.v = (9, 0). (0, -9)
u.v = (9) * (0) + (0) * (- 9)
u.v = 0 + 0
u.v = 0
If the scalar product of two vectors is zero, both vectors are orthogonal.
Answer:
C. orthogonal

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How do you prove the formula for the sum of an infinite converging series? S∞=a1/1-r

8_murik_8 [283]

Step-by-step explanation:

so the infinite series is

a + ar + ar^2 + ar^3....

= a(1 + r + r^2 + r^3...)

= a(1 + r(1 + r + r^2 + r^3...))

ignore the a for a second

imagine it's 1

we call this sum S

S = 1 + r(1 + r + r^2 + r^3...)

S = 1 + rS

S - rS = 1

S(1 - r) = 1

S = 1/(1-r)

and the difference for that series is every term is multiplied by a

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3 years ago

A rectangle is 14 ft longer than its width. The perimeter is 88ft. Please help

nirvana33 [79]

Answer:

L=29ft

W=15ft

Step-by-step explanation:

Step one:

given

let the width be x

W=x

L= x+14

P= 88ft

perimeter= 2L+2W

so, substituting our data we have

88=2(x+14)+2x

88=2x+28+2x

collect like terms

88=4x+28

88-28=4x

60=4x

divide both sides by 4

x=60/4

x=15

Step two:

the dimensions are

the width is 15ft

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L=29ft

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3 years ago

9x-3x-5=19 solve for x

Natasha_Volkova [10]

Answer: x=4

Step-by-step explanation:

Simplify the left side of 9x-3x-5=19 by combining like terms:

6x-5=19

Add 5 to both sides:

(6x-5)+5=19+5

Simplify:

6x=24

Divide both sides by 6:

(6x)/6=24/6

Simplify:

x=4

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3 years ago

90 POINTSSSSSSS:

denis23 [38]

Answer:

Part A: 12 plus x, the x being how much money he made on Sunday.

Part B: 2 plus x times 2

Step-by-step explanation:

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3 years ago

Read 2 more answers

If (-3, y) lies on the graph of y = 3^x, then y = 1/27 -1 -27

posledela

1/27

Cuz y=3^(-3)=1/(3^3)=1/27

7 0

4 years ago