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GalinKa [24]
2 years ago
9

Please help! I need to finish this before the cutoff!!!!!

Mathematics
1 answer:
katrin2010 [14]2 years ago
7 0

Answer:

im not 100% sure but i think its the last one

D

im not 100% sure though

Step-by-step explanation:

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The difference between 90% and 72% is 18%
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3 years ago
What is the sum of the numbers 24+40 as the product of their gcf and another sum
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This is really conusing
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3 years ago
If angle 8 measures 115, what is the sum of the measures of angle 1 and angle 4?
bogdanovich [222]

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need a pictuer

Step-by-step explanation:

7 0
3 years ago
R = sec(θ) − 2cos(θ), where -π/2 < θ < π/2
Alex

Answer:

  y = (x/(1-x))√(1-x²)

Step-by-step explanation:

The equation can be translated to rectangular coordinates by using the relationships between polar and rectangular coordinates:

  x = r·cos(θ)

  y = r·sin(θ)

  x² +y² = r²

__

  r = sec(θ) -2cos(θ)

  r·cos(θ) = 1 -2cos(θ)² . . . . . . . . multiply by cos(θ)

  r²·r·cos(θ) = r² -2r²·cos(θ)² . . . multiply by r²

  (x² +y²)x = x² +y² -2x² . . . . . . . substitute rectangular relations

  x²(x +1) = y²(1 -x) . . . . . . . . . . . subtract xy²-x², factor

  y² = x²(1 +x)/(1 -x) = x²(1 -x²)/(1 -x)² . . . . multiply by (1-x)/(1-x)

  \boxed{y=\dfrac{x\sqrt{1-x^2}}{1-x}}

__

The attached graph shows the equivalence of the polar and rectangular forms.

4 0
2 years ago
Please I need help ASAP. Can someone help me?
Alenkasestr [34]

Answer: The second bubble thing is correct you have picked the wrong one.

5 0
2 years ago
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