How many hours between 8:15 to 12:45 ?

Answers

Answer 1

Answer: 4.5
an hour to 9:15
one to 10
one to 11
one to 12
and .5 to 1215 to 1245

Answer 2

Answer: Subtract:

12h 45' -
08h 15'
-----------
04h 30'

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Two numbers are in ratio of 2 to3 if the smaller number is 18 the larger number is what

Answers

If you would like to know the value of the larger number, you can calculate this using the following steps:

2 ... 3
18 ... x = ?

2 * x = 3 * 18 /2
x = 3 * 18 / 2
x = 27

The correct result would be 27.

27

2:3
x 9 =
18:27

I hope this helped

If you run 6. Miles an hour how long will it take to do 18 miles help quick pls

Answers

18miles/6mph = 3hrs
3 hours

Perpendicular Vectors:Find v x w if v=5i -4j +4k & w=-6i +3j -2k.
A. 3i-4j-2k
B. -14i-9j-4k
C. 5i +3j -4k
D. -4i -14j -9k

Find v x w if v=-3i-4j-8k & w=2i+6j+4k.
A. 12i -2j +3k
B. 8i +12j +32k
C. 32i -4j -10k
D. 10 i -8j +3k

Find the cross product <-6, 7, 2> x <8, 5, -3>. Is the resulting vector perpendicular to the given vectors?
A. <-31,-2,-86>;yes
B. <-37,-2,0>; no
C. <0,-86,-37>; yes
D. <-37, 0, -80>;no

Answers

1.
v x w = 8 i - 24 j + 15 k + 10 j - 12 i - 24 k =
= - 4 i - 14 j - 9 k
Answer: D )
2.
v x w = -16 i - 16 j - 18 k + 12 j + 48 i - 8 k =
= 32 i - 4 j - 10 k
Answer: C )
3.
The cross product:
< - 6, 7, 2 > x < 8, 5, -3 > =
= - 21 i + 16 j - 30 k - 18 j - 10 i - 56 k =
= - 31 j - 2 j - 86 k = < - 31, - 2, - 86 >
Vectors are perpendicular if: cos ( u, v ) = 0
< - 6 , 7. 2 > * < -31, - 2, - 86 > = 186 - 14 - 172 = 0
< 8, 5 , - 3 > * < - 31, - 2, - 86 > = -248 - 10 + 258 = 0
Answer: A ) < - 31, - 2 , - 86 >, yes.

John needs to make a scale drawing of his school building for art class. If the building is 256.25 meters long, and John scales it down using a ratio of 25 meters to 1 inch, how long will the building be in the sketch?

Answers

So we want to know how long will the scale drowing of the building be if the building is 265.25m long and the scale is 1 inch on the drawing is equal to 25 meters of the building. To find the answer lets scale the building. If the real length of the building is 256.25 meters, then the number of inches will be: 256.25/25=10.25 inches.

What is ? + 57 = 73

Answers

16 + 57 = 73
I hope that helps!

First you have to subtract 57 from 73 to get the mystery number and you get 16.Then you can check if it works out which it does 16+57=73.

Can ya'll help me? tehee :)

Answers

128
328
437
837
Hope it helped

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Somebody help me quickly please:)

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