All categories

3 years ago

Solve the system of equations and choose the correct answer from the list of options. (4 points)

Mathematics

1 answer:

mezya [45]3 years ago

7 0

Answer:

c. negative 19 / 2 , negative 33 / 2

Step-by-step explanation:

x − y = 7

y = 3x + 12

Substitute y = 3x + 12 into x − y = 7

x − (3x + 12) = 7

x - 3x - 12 = 7

-2x - 12 = 7

-2x = 19

x = -19/2

Substitute x = -5/2 into x − y = 7

-19/2 − y = 7

y = -19/2 - 7

y = - 5/2 - 14/2

y = -33/2

Answer:

x = -19/2, y = -33/2

You might be interested in

HelppppppppppppppppppppppppppppppppppppppppppPp

Zigmanuir [339]

Answer:

Step-by-step explanation:

4) You just have to find the lcm of the denominators

a) lcm(4,3,6)=4*3=12

$\dfrac{3}{4} x-\dfrac{2}{3} =\dfrac{1}{6}x\\\\12*(\dfrac{3}{4} x-\dfrac{2}{3}) =12*(\dfrac{1}{6}x)\\\\12*\dfrac{3}{4} x-12*\dfrac{2}{3} =12*\dfrac{1}{6}x\\\\9*x-8 =2*x\\\\9*x-2*x =8\\\\7*x=8\\\\x=\dfrac{8}{7} \\$

b) I don't know the name of the property but it is :

"We can multiply the two members of an equality by the same non-zero number, we obtain an equality. "

$-6x+10+8x=12-4x\\\\(-6x+10)+8x=12-4x\\\\8x+(-6x+10)=12-4x\\\\8x-6x+10=12-4x\\\\2x+10=12-4x\\....$

7 0

3 years ago

3= g/ -4 - 5 <br>what is g <br>plz help me

SpyIntel [72]

Answer:

$\boxed{\bold{g=-32}}$

Step By Step Explanation:

Switch Sides

$\bold{\frac{g}{-4}-5=3}$

Add 5 To Both Sides

$\bold{\frac{g}{-4}-5+5=3+5}$

Simplify

$\bold{\frac{g}{-4}=8}$

Multiply Both Sides By -4

$\bold{\frac{g\left(-4\right)}{-4}=8\left(-4\right)}$

Simplify

$\bold{g=-32}$

4 0

3 years ago

Read 2 more answers

40 POINTS + BRAINLIEST! PLEASE SHOW ALL WORK

Elina [12.6K]

Hey there,

Your correct answer would be in the attachment below.

Hope this helps you!

~Jurgen

7 0

4 years ago

Help help help help hlep help help help helph elp

Orlov [11]

9514 1404 393

Answer:

step 2; misapplication of the distributive property

Step-by-step explanation:

To eliminate parentheses, the distributive property of multiplication over addition tells you the outside factor is applied to each of the terms inside. The second step should be ...

Step 2: (0.5)(4) +(0.5)(1.2x) +(0.5)(-3.1) = 2 +0.6x -1.55

Shane's mistake was that he added the factor to the first term, subtracted the factor from the coefficient of the second term, and added the factor to the third term. He was inconsistent even in his misapplication of the distributive property.

3 0

3 years ago

What is x divided by y

Natalija [7]

Answer:

X/Y

Step-by-step explanation:

You cannot divide two variables so you just leave it as a fraction

3 0

4 years ago

Read 2 more answers