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allsm [11]
1 year ago
12

Find the perimeter of the triangle: To find a perimeter you must add up all of the sides. The sides are12, 10, 8

Mathematics
1 answer:
mel-nik [20]1 year ago
7 0

The formula of the perimeter of a triangle is

P=a+b+c

where a,b,c are the sides of the triangle

P=12+10+8=30

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You roll a red, yellow and blue number cube. How many different rolls are possible?
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18 rolls are possible.

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The total number of branches in a tree diagram will be which of the following values?
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The total number of branches = total possibilities = the denominator of a probability.

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Factorise fully the following:<br>a) x² + 2x<br>b) 2x² - 6x<br>c) 15x - 10x³<br>d) 9x² + 3x³​
Lostsunrise [7]

Answer:

a) x(x+2)

b) 2x(x-3)

c) 5x(3-2x^2)

d) 3x^2(3+x)

Step-by-step explanation:

a) x^2+2x

When factoring a binomial (a polynomial with two terms), what we will be looking for are the terms that are shared between them.

In this problem, it can be seen that both of these terms have and x. This means that we can factor it out to get

x(x+2)

b) 2x^2-6x

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It can be seen that each of these share a 2x, so our factored form would be

2x(x-3)

c) 15x-10x^3

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The common factor of this one is 5x, so our factored form would be

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The expression below is the factorization of what trinomial-1(x+5)(x+6)
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-x^2 - 11x -30

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Solve using foiling. Ignore the -1 to begin with and just look at the part in parenthesis. Do x from the first parenthesis times the stuff in the second parenthesis.

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ie: x^2 + 6x

Then do the 5 times the things in the second parenthesis.

ie: 5(x) and 5(6)

ie: 5x + 30

Then add what you got from multiplying the first value to what you got from multiplying the second.

ie: x^2 + 11x + 30

This is a trinomial because it has three different variables. Now change all the signs to negative because of the -1 out front.

ie: -x^2 - 11x -30

4 0
2 years ago
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