X+y=21; y=2x in substitution

the answer is a

step-by-step explanation:

i need on these three questions. find standard form equation of line perpendicular to y = (2/3)x - 8 that goes through the point

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step-by-step explanation:

explanation:

remove parenthesis:

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apply rule

=

multiply fractions:

=

=

divide:

=

mordancy.

“a term can be a signed number, a variable, or a constant multiplied by a + sign or j sign. in , the terms are 5x , 3y and 8. when a term is made up of a constant multiplied by a variable or variables, that constant is called a coefficient.” i hope this you.