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Tanzania [10]
3 years ago
7

If cosx=-3/7, find the value for cos4x

Mathematics
1 answer:
charle [14.2K]3 years ago
6 0

Answer:

cos ( 4 x ) = - 479 / 2401

Step-by-step explanation:

:D

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Mum bough a litre of orange juice. She filled 6 glasses and had 1/4 of a litre left. How much was in each glass?
saveliy_v [14]
Each one had 1/8 litre
because she had 1/4 out of 1 left so she used 3/4 litre to fill 6 glasses
3/4 ÷6 = 1/8
3 0
3 years ago
Read 2 more answers
(X^10y^2)^1/5a^2/5
Ket [755]

Answer:

(a^2 x^10 y^2)^(1/5)

Step-by-step explanation:

a is raised to the 2/5 power. If you put it under the 1/5 power brackets, a will squared comparred to all the other powers.

So the answer is (a^2 x^10 y^2)^(1/5)

4 0
3 years ago
Michael drove from home to work at an average speed of 45 mph. His return trip home took 45 minutes longer because he could only
Xelga [282]

The distance from his home to his work place is 118.125 miles

<h3>How to find the distance from his home to his work place?</h3>

He drove from home to work at an average speed of 45 mph. Therefore,

speed = 45 mph

let

time = x

speed = distance / time

distance = 45x

His return trip home took 45 minutes longer because he could only drive at 35 mph. Therefore,

45 minutes = 0.75 hours

distance = 35(x + 0.75)

distance = 35x + 26.25

Therefore,

45x = 35x + 26.25

45x - 35x = 26.25

10x = 26.25

x = 26.25 / 10

x = 2.625

Therefore,

distance = 45(2.625) = 118.125 miles

learn more on distance here: brainly.com/question/21329221

#SPJ1

3 0
2 years ago
If 5% of an item is $1.50, what is the original price?
Olegator [25]

Answer:

original price = $30.00

Step-by-step explanation:

note that the original price is 100% , then

1% = $1.50 ÷ 5 = $0.30 , so

100% = 100 × $0.30 = $30.00

6 0
1 year ago
Read 2 more answers
Geometry: Solve for X
nevsk [136]
6) x= 2, angle = 90 degrees obviously
7) Im not sure on this one
8) x = 5
9) x = 1

3 0
3 years ago
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