3 years ago

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

1 answer:

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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Grade 8 Math

zavuch27 [327]

Question #1 = <span>the amount of snow that falls each hour
question #2 = the starting amount of snow
algebra sucks, keep up the good work

</span>

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3 years ago

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4 times a number is decreased by 9, the result is the same as when 15 is added to twice the number. find the number

igor_vitrenko [27]

Answer:

Step-by-step explanation:

4*x-9=2x+15

4x-9=2x+15

-2x -2x

2x-9=15

2x=24

x=12

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2 years ago

Evaluate the function at each specified value of the independent variable and simplify. (if an answer is undefined, enter undefi

tekilochka [14]

For this case we have the following function:

$h (t) = t ^ 2 - 8t$

What we should do is evaluate the function for the different values of the independent variable.

We have then:

For x = 8:

$h (8) = (8) ^ 2 - 8 (8)$

$h (8) = 64 - 64$

$h (8) = 0$

For x = 1.8:

$h (1.8) = (1.8) ^ 2 - 8 (1.8)$

$h (1.8) = 3.24 - 14.4$

$h (1.8) = -11.16$

For x = x + 8:

$h (x + 8) = (x + 8) ^ 2 - 8 (x + 8)$

$h (x + 8) = x ^ 2 + 16x + 64-8x-64$

$h (x + 8) = x ^ 2 + 18x$

Answer:

The results of evaluating the function are:

$h (8) = 0$

$h (1.8) = -11.16$

$h (x + 8) = x ^ 2 + 18x$

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3 years ago

15 _2_3 = 9<br> Fill in the gaps from left to right.

ruslelena [56]

15-2x3=9 following the rule of PEMDAS

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3 years ago

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sladkih [1.3K]

I think 15 I am not 100 percent on that

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2 years ago

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