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marshall27 [118]
3 years ago
11

What are 3 ways to solve a system of linear equations?​

Mathematics
1 answer:
ANEK [815]3 years ago
7 0
The three ways are substitution, elimination, and graphing
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Explain why the expression 7•3x is not equal to the expression 21x
Firdavs [7]
Working out the expression 7(3ˣ) is first to calculate the value of 3ˣ then multiply the answer to 7.

For example, let x = 2
Then 7(3ˣ) = 7(3²) = 7 × 9 = 63

With the same value of x = 2, calculating 21ˣ = 21² = 441, which isn't the same answer with the expression 7(3ˣ)
5 0
4 years ago
La suma del cuadrado de un número más el triple del mismo número es igual a dieciocho. Encuentra dicho número.
Genrish500 [490]

If the sum of the square of a number plus the triple of the same number equals eighteen, the required numbers are 3 and -6

Let the unknown number be x

The square of the number is expressed as x²

Triple of the unknown number will also be expressed as 3x

Taking the sum of both numbers and equating it to 18 will give;

x^2 + 3x = 18\\x^2 + 3x - 18 =0

Factorize the resulting equation:

x^2+3x -18=0\\x^2+6x-3x-18=0\\x(x+6)-3(x+6)=0\\(x-3)(x+6)=0\\x= 3 \ and \ -6

Hence the required numbers are 3 and -6

Learn more here; brainly.com/question/13805464

3 0
3 years ago
HELP HELP HELP HELP HELP HELP HELP HELP HELP PLEASE
iogann1982 [59]
Well you would divide distance by time and you should make sure that you do the trucks equation seperate from the cars equation other wise you would only get one answer and it looks like you need 2 so figure out the time an distance for each car then divide distance by time and that is your answer.
3 0
4 years ago
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there are between 700 and 800 marbles in the pail. the marbles were purchased in 8 equally sized bags. the product of all the di
Anna71 [15]
The product is actually 4,480,000
7 0
4 years ago
Experts/ace/geniuses helpp
klio [65]
Because the 5 repeats the fraction would be 3 and 25/99
5 0
3 years ago
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