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3 years ago

NEED HELP THIS IS SOOOOOO HARD NEED PROOF WILL GIVE BRAINLIEST AND 5-STAR

Mathematics

1 answer:

Shkiper50 [21]3 years ago

7 0

Answer:

J 1

--------

x^2 -x

Step-by-step explanation:

x+1

----------

x^3-x

Factor out an x in the denominator

x+1

----------

x(x^2-1)

We can factor the terms in the parentheses because it is a difference of squares

x+1

----------

x(x-1) (x+1)

Canceling the x+1 terms

----------

x(x-1)

Distribute in the denominator

--------

x^2 -x

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PLEASE HELP! QUICK i'll give you brainliest if you answer correctly.

dem82 [27]

Answer:

8(-4) = -32

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3 years ago

10( x + 1) = 2 x-7 ??

sergiy2304 [10]

Answer: x=- 17 / 8

Step-by-step explanation:

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)

−

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a 9 grade math class has 27 students there are twice as many girls in this class as there are boys.write a system of equation th

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3 years ago

1.The angle of elevation of a jet plane from a point R on the ground is 60°. After a flight of

egoroff_w [7]

Answer:

Diagram is not so perfect

OR = distance travelled by the jet plane.

Step-by-step explanation:

Let point J be the jet plane and OJ be the constant height at jet plane is flying and OR be the distance jet plane is travelling.

h =

$1700 \sqrt{3}$

Now,

From the figure i drew (1st)

taking 60 as reference angle,

tan60° = p/b

or,

$tan60 = 1700 \sqrt{3} \div b$

$b \: = 1700 \sqrt{3} \div tan60$

so, b = 1700m

inital distance = 1.7km(OR)

now,

tan 30 = p/b

$tan30 = 1700 \sqrt{3} \div b \\ or \: b = 1700 \sqrt{3} \div tan30$

so, b = 5100 m

so, final distance = 5.1 km(OR)

Now,

distance travelled = final distance - initial distance

distance travelled = 5.1 km - 1.7km

distance travlled = 3.4 km

Now,

time = 17 seconds

= 0.00472 hour.

Now,

speed = d/t

or, speed = 3.4/0.00472

so, speed = 720.3389km/hr

so, speed = 720 km/hr approximately

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3 years ago