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Yuliya22 [10]
3 years ago
14

Please show your work how you solved this ! Please answer this !!

Mathematics
1 answer:
ValentinkaMS [17]3 years ago
6 0

Answer:

-5xa^2-7a^3+7a^2+4

Step-by-step explanation:

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Two planes, which are 3740 miles apart, fly towards eah other. Their speeds diifer by 35 miles per hour. If they pass eah other
solmaris [256]

Answer:

In 4 hours they flew a combined 3740/4 = 935mph or 467.5mph each. +/- 17.5 to this number,

485mph & 450mph are their speeds.

Step-by-step explanation:

I believe this is correct, if not feel free to let me know and I will fix it. I'm sorry in advance if it is incorrect.

4 0
3 years ago
3cis(5pi/4) in polar form
madreJ [45]
Rectangular form:
z = -2.1213203-2.1213203i

Angle notation (phasor):
z = 3 ∠ -135°

Polar form:
z = 3 × (cos (-135°) + i sin (-135°))

Exponential form:
z = 3 × ei (-0.75) = 3 × ei (-3π/4)

Polar coordinates:
r = |z| = 3 ... magnitude (modulus, absolute value)
θ = arg z = -2.3561945 rad = -135° = -0.75π = -3π/4 rad ... angle (argument or phase)

Cartesian coordinates:
Cartesian form of imaginary number: z = -2.1213203-2.1213203i
Real part: x = Re z = -2.121
Imaginary part: y = Im z = -2.12132034
8 0
3 years ago
Let f(x)=cos(arctanx). What is the range of f?
Alenkasestr [34]
-π/2 < arctan(x) < π/2

So cos(π/2) < cos(arctan(x)) < cos(0)

0 < cos(arctan(x)) < 1
4 0
3 years ago
How to answer the problem
Snowcat [4.5K]

(3 + 2) - 3² = 5 - 9 = -4

Regards :)

3 0
3 years ago
Read 2 more answers
Find the center and radius of this circle x^2+y^2-6x-10y+30=0
Artist 52 [7]

Answer:

Center: (3,5)

Radius: 2

Step-by-step explanation:

x² + y² - 6x - 10y + 30 = 0

Put equation into center-radius form. First regroup terms:

(x²-6x) + (y²-10y) = -30

Complete the squares:

(x²-6x+3²) + (y²-10y+5²) = -30 + 3² + 5²

(x-3)² + (y-5)² = 4 = 2²

Center: (3,5)

Radius: 2

8 0
2 years ago
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