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3 years ago

I need help for all of it

Mathematics

1 answer:

bulgar [2K]3 years ago

3 0

Answer:

1. <

2. <

3. <

4. <

5. >

6. >

7. -2, 5, 6

8. -3, 0, 9

9. -1, 1, 6

10. 1, 0, -1

11. 2, 1, -12

12. -10, -11, -12

13. 205, 50, -5, -20

14. 78, 9, -78, -89

15. 60, 0, -2, -55

16. 28, 8, 0, -8

17. 38, 37, -37, -38

18. 11, 1, -1, -111

Explanation:

When it comes to negative and positive numbers you must be careful.

For a positive number, the bigger it is is the greater it'll get

For negative numbers, as the numbers continue to increase the less the value will become.

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Which expression is equivalent to radical-80?

solong [7]

√(-80) = √(4²×5(-1)) = 4√5 √(-1) = 4√5i.

8 0

3 years ago

A ball is thrown vertically in the air with a velocity of 100ft/s. Use the projectile formula h=−16t2+v0t to determine at what t

Naddika [18.5K]

Answer:

The times are 2.5 sec and 3.75 sec

Step-by-step explanation:

* Lets explain the projectile formula

- The ball thrown vertically in the air with initial velocity 100 ft/sec

- the projectile formula is h = -16 t² + vo t, where h is the height of the

ball after thrown it in t seconds and vo is the initial velocity

∵ The initial velocity is 100 ft/sec

- substitute vo by 100

∴ The projectile formula is h = -16 t² + 100 t

- To find the time that the ball is at a height of 150 ft substitute

h by 150 in the projectile formula

∵ h = - 16 t² + 100 t

∵ h = 150 ft

∴ 150 = -16 t² + 100 t

- Subtract 150 from both sides

∴ 0 = -16 t² + 100 t - 150

- Multiply the both sides by -1

∴ 16 t² - 100 t + 150 = 0

* Lets factorize it to find the value of t

∵ 16 t² = 4t × 4t ⇒ first terms in the 2 bracket

∵ 150 = 15 × 10 ⇒ second terms in the two brackets

∵ 4t × 15 = 60 t ⇒ nears

∵ 4t × 10 = 40 t ⇒ extremes

∵ 6t + 40 t = 100 t ⇒ middle term

∴ 16 t² - 100 t + 150 = (4t - 15)(4t - 10)

∵ 16 t² - 100 t + 150 = 0

∴ (4t - 15)(4t - 10) = 0

- Equate each bracket by 0

∴ 4t - 15 = 0 ⇒ add 15 to both sides

∴ 4t = 15 ⇒ divide both sides by 4

∴ t = 3.75

- OR

∴ 4t - 10 = 0 ⇒ add 10 to both sides

∴ 4t = 10 ⇒ divide both sides by 4

∴ t = 2.5

- The ball will be at height 150 ft in 2.5 seconds we the ball goes up

and again ate 3.75 seconds when the ball goes down after it

reached its maximum height

* The times are 2.5 sec and 3.75 sec

5 0

3 years ago

Read 2 more answers

What percent of this grid is shaded?

Marysya12 [62]

Answer:

A. 76%

Step-by-step explanation:

70+6=76 squares are shaded

3 0

3 years ago

Im bored so i want to do another little giveaway but there is still going to be a big giveaway later so be on the look out. enjo

o-na [289]

Answer:

Step-by-step explanation:

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3 years ago

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The two toy store owners agree to specialize and to trade 30 puzzles for 10 puppets. The terms of trade are still 3 puzzles for

likoan [24]

Based on the exchange rate, at the end of the trade, Lewis will have 31 puppets and 2 puzzles left over while Geppeto will have 158 puzzles and 4 puppets left over.

<h3>What is the exchange rate of puzzles for puppets?</h3>

The exchange rate of puzzles for puppets is 3 to 1.

Geppeto has 20 puppets to exchange for puzzles.

Lewis has 50 puzzles to exchange for puppets.

Number of times Lewis can exchange puzzles for puppets = 50/3 = 16 times.

Lewis will get 16 puppets in exchange for 48 puzzles.

Therefore;

Lewis will have 16 + 25 puppets = 31 puppets and 2 puzzles left over

Geppeto will have 48 + 100 puzzles = 158 puzzles and 4 puppets left over.

in conclusion, the exchange rate determines the how many puzzles and puppets will each one have after they complete their trade.

Learn more about exchange rate at: brainly.com/question/2202418

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7 0

2 years ago