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grin007 [14]
2 years ago
8

Which of the following are roots of the polynomial function f9X0=x^3+3x^2-9x+5

Mathematics
1 answer:
Pani-rosa [81]2 years ago
5 0
D should be it good luck
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An airplane is flying in a direction of 75° north of east at a constant flight speed of 300 miles per hour. The wind is blowing
Nutka1998 [239]

Answer:

79.7°

Step-by-step explanation:

We resolve the speed of the plane into horizontal and vertical components respectively as 300cos75° and 300sin75° respectively. Since the wind blows due west at a speed of 25 miles per hour, its direction is horizontal and is given by 25cos180° = -25 mph.  We now add both horizontal components to get the resultant horizontal component of the airplane's speed.

So 300cos75° mph + (-25 mph) = 77.646 - 25 = 52.646 mph.

The vertical component of its speed is 300sin75° since that's the only horizontal motion of the airplane. So the resultant vertical component of the airplane's speed is 300sin75° = 289.778 mph

The direction of the plane, Ф = tan⁻¹(vertical component of speed/horizontal component of speed)

Ф = tan⁻¹(289.778 mph/52.646 mph)

Ф = tan⁻¹(5.5043)

Ф = 79.7°

6 0
2 years ago
2m · 2n would be the same as _____.<br><br> A) 4 mn<br> B) 2 m + n<br> C) 2 mn<br> D) 2 m - n
JulsSmile [24]

Answer:

A) 4mn

Step-by-step explanation:

2m × 2n = 4mn

I hope this helps!

3 0
2 years ago
Read 2 more answers
Mr. Peterson paid $1,020 in interest for a loan, which was given to him at a rate of 5% for 3 years. How much money did he borro
Nataly_w [17]

Answer:

The amount of money originally borrowed by Mr. Peterson  is $6,800.

Step-by-step explanation:

Let us assume the money borrowed originally = P

Rate of interest  = 5%

Time = 3 years

S interest = $1020

Simple Interest  = \frac{P \times R \times T }{100}

Substituting the all values, we get:

1020 = \frac{P \times 5 \times 3 }{100}\\\implies P = \frac{102000}{15}  = 6,800

⇒  P = $6,800

Hence, the amount of money originally borrowed by Mr. Peterson  is $6,800.

6 0
3 years ago
Help me to solve this question pleaseee
Alika [10]
Cant see the attachment.<span />
6 0
3 years ago
Help me please it’s would be very appreciated!
Basile [38]

Answer:

i believe its the last one 2 x 10 = 20

Step-by-step explanation:

3 0
1 year ago
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