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4 years ago

9

How do i solve this equation??

1 answer:

GenaCL600 [577]4 years ago

4 0

Answer:

<h2>x = 3 and y = 6 → (3, 6)</h2>

Step-by-step explanation:

$\left\{\begin{array}{ccc}2x-y=0&\text{add y to both sides}\\3x-2y=-3\end{array}\right\\\\\left\{\begin{array}{ccc}2x=y&\to y=2x&(1)\\3x-2y=-3&&(2)\end{array}\right\\\\\\\text{Substitute (1) to (2):}\\\\3x-2(2x)=-3\\3x-4x=-3\\-x=-3\qquad\text{change the signs}\\\boxed{x=3}\\\\\text{Put the value of x to (1)}:\\\\y=2(3)\\\boxed{y=6}$

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I really need help i i put a picture up but this thing do´s not let me post it with out a question ?

kobusy [5.1K]

Answer:

Step-by-step explanation:

$y=-x^{2} -5x-6$

$y=-(x^2+5x+6)$

$y=-(x+3)(x+2)$

Set each factors equal to zero.

$(x+3)=0 , x=-3$

$x+2=0 , x=-2$

The x-int is

$(-2,0)$

4 0

3 years ago

Mr. Lopez wrote the equation 32g+8g-10g=150 on the board. Four students explained how to solve for g. Alyssa: “I added 32 and 8

Vaselesa [24]

Answer:

Wilhem

Step-by-step explanation:

The given equation is

$32g+8g-10g=150$

Step 1 : Add 32g and 8g.

$(32g+8g)-10g=150$

$(32+8)g-10g=150$

$40g-10g=150$

Step 2: Subtract 10 from 40.

$(40-10)g=150$

$30g=150$

Step 3: Divide both sides by 30, find the value of g.

$\frac{30g}{30}=\frac{150}{30}$

$g=5$

The value of g is 5.

Therefore, Wilhem is correct.

7 0

3 years ago

Read 2 more answers

Salut! <br> |4x^2+9x-9|=0 <br> X= ? <br> Multumesc in avans :D

Afina-wow [57]

X=3 or -3/4.<span>Îmi pare rău că nu mi-am arătat munca</span>

8 0

3 years ago

PLEASE help a girl out! :)What is the actual area of the room?

andrey2020 [161]

Answer:

$=75$ $ft^{2}$

Step-by-step explanation:

Area is found by mulitplying width and height.

$A=7.5(5)\\$

$A=37.5\\$ in

The ratio is 0.5in : 1ft, so if you multiply that ratio to the answer, you should get the answer in feet.

$37.5$ in x $\frac{1ft}{0.5in}$ $=75$ $ft^{2}$

7 0

3 years ago

If f(x)=3x + 2 and g(x)=2x - 2 what is (f-g)(x)?

omeli [17]

(3x+2)-(2x-2)
3x+2-2x-2
3x-2x=x
2-2+0
X

4 0

4 years ago