3 years ago

What algebraic expressions are equivalent to 5x squared - 8

Mathematics

1 answer:

aleksandr82 [10.1K]3 years ago

3 0

Answer:

1. 2x^2+3x^2-8 (you can only combine when the variable and exponent are the same).

2. 5x^2-4-4

3. 5x^2(-16)-8

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I need help :( (please explain how you got your answer too)

ch4aika [34]

Answer:

a. fly = 5.7

b. fly = 7.5

Step-by-step explanation:

hoist/fly = 1 / 1.9

The new hoist is 3. To get this you have to multiply 1 by 3. That means you have to multiply 1.9 by 3 too.

1.9 * 3 = 5.7

hoist/fly = 3/5 (this is the new ratio)

4.5 / 3 = 1.5

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2 years ago

The difference of a number x and 1/2

Yuliya22 [10]

X - 1/2 (if you meant the difference between)

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3 years ago

Two planes are the same altitude. From the airport , one plane is 50 km away in the direction of N°60 E and another is 80 km awa

djverab [1.8K]

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Answer:

78.5 km

Step-by-step explanation:

Measured at the airport, the angle between the two planes is ...

180° -60° -50° = 70°

The law of cosines tells us the distance between the planes is ...

d = √(50² +80² -2·50·80·cos(70°)) ≈ √6163.84 ≈ 78.5 . . . km

The planes are about 78.5 km apart.

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2 years ago

A radioactive substance decays exponentially. A scientist begins with 100 milligrams of a radioactive substance. After 27 hours,

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33.3 because 27/50=36/x and x=66.67 and thats how much as decayed after 36 hours but you want what is left so subtract from 100 and get 33.3

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3 years ago

Super easy!!<br><br> 3 1/2 x 5 =

bearhunter [10]

Answer:

35/2 or 17.5 or 17 1/2

Step-by-step explanation:

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2 years ago

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