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I am Lyosha [343]
3 years ago
5

6x-3y=6 y=2x+5 USE SUBSTITUTION SHOW YOUR WORK

Mathematics
2 answers:
Masja [62]3 years ago
6 0
6x - 3y = 6 ⇒ 6x - 3y = 6 ⇒ 6x - 3y = 5
 y = 2x + 5 ⇒ 2x - 1y = 5 ⇒<u> 6x - 3y = 15</u>
                                                  -<u>6y</u> = <u>-10</u>
                                                   -6      -6
                                                     y = 1 2/3
                                   6x - 3(1 2/3) = 6
                                             6x - 5 = 6
                                             <u>     +5  +5</u>
                                                   <u>6x</u> = <u>1</u>
                                                    6     6
                                                     x = 1/6
                                               (x, y) = (1/6, 1 2/3)
mote1985 [20]3 years ago
3 0
What you're going to do is plug in y=2x+5 into the 3y ( getting rid of the y to solve for x only) so that gives you...... 6x-3(2x+5)=6. Next, you're going to multiply -3 to 2x and 5. Now it gives you..... 6x-6x-15=6. The x's cancel out leaving the equation with -15=6 making it an Inconsistent system also known as a No Solution system. 
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ehidna [41]

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There are 25 students in class 2-11 and 20% wear glasses. How many wear glasses?
ryzh [129]

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4 0
2 years ago
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9. Rama is using a hand glider to fly directly from the top of one cliff onto another cliff below. The glider is guided by a cab
dexar [7]

Answer:

791.2 ft

Step-by-step explanation:

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H=\sqrt {x^{2}+y^{2}}

where x and y represent the distance between two cliffs apart and difference in heights. Substituting 740 for x and 280 for y then

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6 0
3 years ago
Read 2 more answers
3m-n=km-8, solve for m
viktelen [127]

Add n on both sides:

3m = km - 8 + n

Subtract km on both sides:

3m - km = n - 8

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Divide both sides by (3 - k):

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5 0
3 years ago
Read 2 more answers
Number 18 pls help me
Harman [31]
Lila did it correctly. The answer is 324

Following PEMDAS, we first focus on the parenthesis. So we simplify 9-3 to get 6

So we go from 
18*4^2+(9-3)^2 
to 
18*4^2+6^2 

The next step is applying exponents. In this case, squaring the terms, so we go from
18*4^2+6^2 
to
18*16+36

Next is multiplying
18*16+36
turns into
288+36

Finally, add up 288 and 36 to get 288+36 = 324

That confirms that Lila is correct

----------------------

The error that Rob made is that he computed 18*4^2+9^2-3^2 but it is NOT correct. Saying (x-y)^2 = x^2-y^2 isn't a true equation for all x and y. Again you have to simplify what is in the parenthesis first, and then you can square it. Or you must use the FOIL rule to expand out (9-3)^2


7 0
3 years ago
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