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UkoKoshka [18]
3 years ago
9

Help I’ll mark you brainly!

Mathematics
1 answer:
Gnesinka [82]3 years ago
7 0
Pls mark brainleist

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Find x using the trig ratios please
Karo-lina-s [1.5K]

Answer:

12.9

Step-by-step explanation:

cos 72 = 4/x

x = 4/cos72

x = 12.9

7 0
3 years ago
Can someone help with that?<br><br>if x+y=2, calculate: <br>P=4x (x-3)+4y(y-3)+8xy​
olganol [36]

Answer:

Step-by-step explanation:

P = 4x(x - 3) + 4y(y - 3) + 8xy

  = 4x² - 12x + 4y² - 12y + 8xy

  = (4x² + 8xy + 4y²) - (12x + 12y)

 = 4(x² + 2xy + y²) - 12(x + y)

 = 4(x + y)² - 12(x + y)

x+y =2 ⇒ P = 4.2² - 12.2 = 16 - 24 = -8

6 0
3 years ago
How do u solve x+3=14
prohojiy [21]

Answer:

x= 11

Step-by-step explanation:

you subtract 3 from 14 and 11 is you answer so x=11

3 0
3 years ago
Read 2 more answers
The sale price of an item is $160 after a 20% off discount. What was the original price of the item?
bulgar [2K]

Answer:

200

Step-by-step explanation:

160/80 is 2. 2 times 100 is 200

6 0
3 years ago
What is the slope of the graph of 8x – 4y = 11?
AlekseyPX
Y = mx + b
where m is the gradient (slope)
-4y = 11 - 8x
4y = 8x - 11
y = 2x - 11/4
m = 2

The correct answer is A.
7 0
3 years ago
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