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3 years ago

Express how you know that the sum of any two consecutive triangular numbers is a square number.

Mathematics

1 answer:

maw [93]3 years ago

8 0

Answer: Beacause 2 triangles make a square

Step-by-step explanation: 2 triangles make a square so it must be the same with numbers? -an 8th grader(me) [lol i'm not that smart]

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Alex repairs clocks at a shop.· He earns $96 per day plus $16 per hour for every hour of overtime he works.· Each day, he wants

shutvik [7]

T=16x+96 so if he wants to receive 130$ a day he must work at least 3 hours of over time.

7 0

3 years ago

Read 2 more answers

Can you help me 4(b–1)²–9

Tamiku [17]

Answer:

(b-1)²-9

= 4[(b - 1)(b - 1)] - 9

= 4[b² - b - b + 1] - 9

= 4(b² - 2b + 1) - 9

= 4b² - 8b + 4 - 9

= 4b² - 8b - 5

Hope this helps!

7 0

3 years ago

An astronomical unit (AU) is the average distance between Earth and the sun. One AU is equal to approximately 150,000,000 km. As

Dimas [21]

Using scientific notation, it is found that the measure of one astronomical unit in kilometers is $1.5 \times 10^8$

A number in scientific notation is given by:

$a \times 10^b$

In which $a \in [1, 10)$

To realize the conversion from decimal to scientific notation, b is the number of decimal places the comma moves, being positive if to the left, negative if to the right.

In this problem, 1 AU = 150,000,000 km.

The comma has to move 8 places to the right, hence $b = 8$

Then, the measure is: $1.5 \times 10^8$

For more on scientific notation, you can check brainly.com/question/16394306

5 0

2 years ago

How do i find the mean of a group of number's

inna [77]

Lets say your numbers are these...

10,20,30,40,50,60,70,80,90 and 100

you would add those to get 650

Now how many numbers did you add?

You added 10

so now divided

650 by 10

you get 65

that is the mean of those numbers!

5 0

3 years ago

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PLEASE HELP: if √3 cos x - sin x = B cos(x+θ), show that b cosθ = √3 and b sin θ = 1

Lesechka [4]

Step-by-step explanation:

See attached image for proof

7 0

2 years ago