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4 years ago

Factor 2x^2 - 11x - 21.

Mathematics

1 answer:

Anit [1.1K]4 years ago

3 0

Answer:

(2x+3)(x-7)

Step-by-step explanation:

✯Hello✯

↪ First you are going to want to equally split the equation into separate brackets - I've done this as (2x^2+3)+(-14x-21)

↪ Further factorise this x(2x+3)

↪ From the other bracet factor -7(2x+3)

↪ they have a common term in which we can use to make new brackets

(2x+3)(x-7)

HOPE THIS HELPS

❤Gianna❤

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A car was driving for 4 hours and covered 225 miles. A high-speed train is ten times as fast as this car. Find the train's speed

Lubov Fominskaja [6]

Answer:

562.5 mph

Step-by-step explanation:

First, let's find how fast the car is going in miles per hour. We do this by dividing the miles by how many hours it took:

225/4 = 56.25

The car was going 56.25 mph

A high-speed train is ten times faster than this car so you multiply 56.25 by 10

(10)(56.25) = 562.5

The train's speed is 562.5 mph

Hope this helps!

- Kay :)

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3 years ago

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What is the probability of spinning the pointer on the spinner below and getting a 2 or 4

Lubov Fominskaja [6]

Answer:

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Step-by-step explanation:

There is five numbers on the spinning and the chance of getting one certain number would be 1/5, and if you add the two probabilities together would be 2/5, I am pretty sure.

3 0

3 years ago

I need help. 40x^6+16x^6

xxMikexx [17]

Answer:

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Step-by-step explanation:

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3 years ago

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-9x - x - 7x² - 6x² + 8 +6 Help please

hammer [34]

Answer:

$\boxed{ \bold{ \huge{ { \sf{ - 13 {x}^{2} - 10x + 14}}}}}$

Step-by-step explanation:

$\sf{ - 9x - x - 7 {x}^{2} - 6 {x}^{2} + 8 + 6}$

Collect like terms

⇒ $\sf{ - 7 {x}^{2} - 6 {x}^{2} - 9x - x + 8 + 6}$

⇒ $\sf{ - 13 {x}^{2} - 10x + 8 + 6}$

Add the numbers

⇒ $\sf{ - 13 {x}^{2} - 10x + 14}$

Hope I helped!

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aliya0001 [1]

Answer:

uhhh… i dunno

Step-by-step explanation:

sry i cannot help u w/ this

Can u just put brainliest for this pls?

Thanks!

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3 years ago