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Luda [366]
2 years ago
13

7x + 4y = 2 7x + 2y = 8

Mathematics
1 answer:
Mariana [72]2 years ago
3 0

Answer:

x  =  2 , y  =  − 3

Step-by-step explanation

Solve for the first variable in one of the equations, then substitute the result into the other equation.

Point Form: ( 2 , − 3 )

Equation Form: x  =  2 , y  =  − 3

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natima [27]

Answer:

the first is true

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
CAN SOMEONE HELP ME PLSSS THIS IS THE END OF THE YEAR TEST AND ITS DUE TODAY
sammy [17]

Answer:

I gotchu <333

Step-by-step explanation:

A: y = 0.50x + 5

(y= total amount of money)

(+5 = birthday money)

B: (25) = 0.50x+5

   -5                  -5

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

                20 = 0.50x                gilberto needs to get 40 correct answers

(divided) / 0.50    /0.50

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

40 = x          

C:

y= 0.50 (12) + 5                gilberto will recieve 11 dollars !

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3 0
2 years ago
Kevin and Randy Muise have a jar containing 70 coins, all of which are either quarters or nickels. The total value of the coins
Nikitich [7]

Answer:

50 nickels, 20 quarters.

Step-by-step explanation:

System of equations (q = # of quarters, n = # of nickels):

<em>q + n = 70, 0.25q + 0.05n = 7.50</em>

the first equation can be changed to q = 70 - n, so we are able to <em>substitute q with 70 - n</em>.

So, it will look like <em>0.25*70 - 0.25n + 0.05n = 7.50</em>. This can be simplified to <em>0.2n = 10</em>, which means that n = 50.

Knowing that we can solve <em>q + 50 = 70</em>, which means that q = 20.

6 0
3 years ago
The following equation will have two solutions, y = x2 - 2x - 15?<br> True<br> False
motikmotik
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2 years ago
I don’t understand this, please help
vichka [17]

Answer:

B

Step-by-step explanation:

When graphed the circle has a point in (-4,-3) and the center is (-8,-6)

4 0
2 years ago
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