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3 years ago

Pls help simple stuff

Mathematics

1 answer:

vitfil [10]3 years ago

3 0

Answer: 2) 4x - 8 - 8y

Step-by-step explanation:

if xy=4

then y(x-4)(x+2) use foil method with parenthisies to get

y(x²+2x-4x-8) foil again

x²y+2xy-4xy-8y plug 4 in for xy

x²y+2(4)-4(4)-8y solve what u can

x²y+8-16-8y= x²y-8-8y

for x²y if you take out the exponent you have an xy and an x so when u plug in 4 you get 4x ending up with a solution of

4x-8-8y

Hope that helped

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3 years ago

An airplane must clear a 60-foot pole at the end of a runway 500 yards long determine the angle of elevation at which the airpla

Marat540 [252]

Answer:

2.3 degrees.

Step-by-step explanation:

Please find the attachment.

We are told that an airplane must clear a 60-foot pole at the end of a runway 500 yards long.

Let us convert 500 yards to feet.

1 yard= 3 feet.

500 yards= 3*500 feet= 1500 feet.

We can see from our attachment pole and runway are in form of a right triangle. The pole is opposite to angle of elevation of plane and length of runway is adjacent.

Since tangent represents the relation between opposite and adjacent of right triangle, So we will use tangent to find angle of elevation that plane must ascend to clear the pole.

$tan(\theta)=\frac{60}{1500}$

$\theta=\tan^{-1}(\frac{60}{1500} )$

$\theta=\tan^{-1}(0.04)$

$\theta=2.290610042639$

Therefore, the airplane must ascend 2.3 degrees to clear the pole.

8 0

2 years ago

Someone quickly help! thanks!

Goryan [66]

Answer:

x=23°; θ=87°

Step-by-step explanation:

These two angles create what is known as supplementary angles, or 2 angles that add up to 180°. We know this because all horizontal lines are 180° on either side. Since we know the total value of these two angles should equate to 180°, we can set up a simple equation:

$93+(3x+18)=180$