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stiv31 [10]
3 years ago
15

Solve for X and Y with substitution

Mathematics
1 answer:
Nostrana [21]3 years ago
3 0

Answer:

1. x = no solution

  y = no solution

2. x= 3

    y = -4

Step-by-step explanation:

y = 5 - x

2x + 2y = 6

Divide the equation by 2.

x + y = 3

x + (5 - x) = 3

x + 5 -x = 3

x-x + 5 =3

5 =3  ⇒⇒⇒ This is not true. So, we can say that the simultaneous equation don't have a solution.

-7x - 2y = -13

x - 2y = 11

x = 11 + 2y

-7(11 + 2y) - 2y = -13

-77 - 14y - 2y = -13

-16y = 64

y = -4

x = 11 + 2(-4)

   = 11 - 8 = 3

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Marta_Voda [28]
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5 0
3 years ago
Whats the reciprocal of 5​
zhannawk [14.2K]

Answer:

sorry im late but the answer is -5

Step-by-step explanation:

hoped i was able to help...:)

4 0
3 years ago
At the city museum, child admission is
kramer
We have a system of equations here:

Let 'a' = adult tickets and 'c' = children's tickets

5.80c + 9.00a = 1056.20

We also know that the total number of tickets (adults and children) was 149:

a + c = 149

We need only solve the system.
3 0
4 years ago
How do i solve this problem by factoring?
AlekseyPX
Factor: Trying to factor by splitting the middle term

The first term is 15a^2, its' coefficient is 15

The middle term is - 58a, its' coefficient is - 58a

The last term is "The Constant" is +48

Multiply the coefficient of the first term by the constant 15(48) = 720

Find two factors of 720, whose sum equals the coefficient of the middle term, which is  -58

<span><span>-720    +    -1    =    -721 </span><span>      
-360    +    -2    =    -362 </span><span>      
-240    +    -3    =    -243 </span><span>      
-180    +    -4    =    -184 </span><span>      
-144    +    -5    =    -149 </span><span>      
-120    +    -6    =    -126 </span><span>      
-90    +    -8    =    -98 </span><span>      
-80    +    -9    =    -89 </span><span>      
-72    +    -10    =    -82 </span><span>      
-60    +    -12    =    -72 </span><span>      
-48    +    -15    =    -63 </span><span>      
-45    +    -16    =    -61 </span><span>     
 -40    +    -18    =    -58 </span></span>


Factoring: 15a^2  -  58a  +  48  = 0

Factor left side of equation:
(5a - 6)(3a - 8)


Set fractions equal to Zero
5a - 6 = 0  or  3a - 8 = 0


Answer :  a = 6/5 = 1.200  
or             a = 8/3 = 2.667






Hope that helps!!!!
3 0
4 years ago
Please help , picture above!
Vlad1618 [11]

Answer:

The Slope of the hypotenuse of triangle ABC is equal to the slope of the hypotenuse of triangle CDE

Step-by-step explanation:

AE is a continuous line with consistent slope.

AC is a segment of this line and is the hypotenuse of triangle ABC.

CE is also a segment of AE and is the hypotenuse of triangle CDE.

Hope this helps.

4 0
3 years ago
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