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nadezda [96]
3 years ago
9

A pitcher contains 83.28 cups of iced tea. You drink 2.5 cups of the tea each morning and 0.75 cup of the tea each evening. When

will you ran out of iced tea?
Mathematics
1 answer:
serious [3.7K]3 years ago
8 0

25 days of the iced tea

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If<br>A = i +3j -2K and B=4i-2j+4k<br>Find (2A+B).(A-2B)​
Marizza181 [45]

GIVEN :

a = 1/√10 ( 3i + k) and

b = 1/7 ( 2i + 3j - 6k)

TO FIND :

( 2a- b) . [ ( a x b ) x ( a + 2b)]

SOLUTION :

◆Going with the equation given,

( 2a - b) . [ ( a x b ) x ( a + 2b)]

= (2a - b) [( a×b×a) + 2(a×b)×b]

◆BAC - CAB RULE,

A×B×C = B( A.B ) - C(A.B )

= (2a- b ) [ (b (a.a ) - a (a.b ) + 2b ( a.b) -2b (a.b]

Solving further

= (2a - b )(b - 2a)

= -4a.a -b.b

=-5.

Answer:

( 2 - b) . [ ( a x b ) x ( a + 2b)] = -5

Hoped I helped

8 0
3 years ago
I am having difficulties solving this problem someone pls help.
igor_vitrenko [27]

Answer:

Each time, the x is being multiplied by -3 to result in the output.

So for every x input, multiply by -3.

For the y output for 15, you would divide by -3 to find the input x

For example, when 7 is the input, multiply by -3, and the output y would result in -21.

7 0
3 years ago
Read 2 more answers
4 times a number is increased by 15, the answer is the same as when 70 is decreased by the number
pentagon [3]

4n+15=70+n


I'm pretty sure this is the answer

Have a good day!

3 0
3 years ago
Read 2 more answers
Solve the empty gas tank of a truck needs to be completely filled. the tank is shaped like a cylinder that is 3.5 ft long with a
Dmitrij [34]
5.3 minutes.  
First, let's calculate the volume of the tank. That will be the area of the base multiplied by it's length. And since it's base is a circle, the area is pi*r^2. So:
 V = l*pi*r^2
 V = 3.5 * pi * (2.2/2)^2
 V = 3.5 * pi * (1.1)^2
 V = 3.5 * pi * 1.21
 V = 4.235 * pi
 V = 13.30464489
 
 So the tank has a volume of about 13.3 ft^3. Now simply divide that volume
by the rate of incoming fluid. So
 13.3 / 2.5 = 5.32 
 Rounding to 2 significant figures gives a time of 5.3 minutes.
7 0
3 years ago
NEED HELP PLEASE WILL MARK BRAINLIEST !!!
Leona [35]
The answer you need is b
3 0
3 years ago
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