raizagisselle1694

26.06.2019 • 

Mathematics

To solve this system of equations by elimination, what operation could be used to eliminate the y-variable and find the value of x? 2x ? 4y = 6 ? 3x + 3y = 9 a) add 3 times the second equation to 4 times the first equation b) add 4 times the second equation to 3 times the first equation c) subtract 3 times the second equation from 4 times the first equation d) subtract 4 times the second equation from 3 times the first equation

Ответ:

delaneymoses21

28.05.2020

Mathematics

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Step-by-step explanation:

4y=6 (first equation)

3x+3y=9(second equation)

we know if a=a, a+x=a+x,ax=ax

now we add 3 times

4y=6(=)12y=18

now add 4 times

12x+12y=36

now we can eliminate the y and will be

12x=18

x=1,5

2x=3

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Ответ:

kukisbae

18.02.2021

Mathematics

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Heya!

Here is your

The measure of all angles are 60°.

Here,

triangle ABC is an equilateral triangle (all sides are equal)

so, Its all angle measure same.

<A + <B + <C = 1800°

let <B = x

x+x+x =180°

3x = 180

x= 60°

Hence
<B = 60°

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