3 years ago

Can someone help me whit this pls

Mathematics

1 answer:

UNO [17]3 years ago

7 0

I just need to answer some questions lol

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-5x-16=9x+x-1<br> Solve the equation.

Serggg [28]

Answer:

x=-1

Step-by-step explanation:

15x=-15

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3 years ago

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Mr. Joaquin had $71.25 in his bank account, but then he bought some new ties and pants. After the purchase, he was in debt $25.2

vitfil [10]

Answer:

-96.45

Step-by-step explanation:

You take 71.25 and add it to 25.20 because you know that he had 71.25 in is accound already but he went into debt

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3 years ago

Determine whether the function are inverse. F(x)=6x+l;g(x)=6x-1

sesenic [268]

Nope, inverse of first function is
f^-1(x)= (x-1)/6

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3 years ago

Please help!!!!!

vampirchik [111]

Answer:

Step-by-step explanation:

Consider the quadratic equation, we have

$ax^2+bx+c=0$

Dividing the equation by a, we get

$x^2+\frac{b}{a}x+\frac{c}{a}=0$

Put $\frac{c}{a}$ on the other side,

$x^2+\frac{b}{a}x=\frac{-c}{a}$

Add $(\frac{b}{2a})^2$ on both the sides,

$x^2+\frac{b}{a}x+(\frac{b}{2a})^2=\frac{-c}{a}+(\frac{b}{2a})^2$

completing the square, we have

$(x+\frac{b}{2a})^2=\frac{-c}{a}+(\frac{b}{2a})^2$

Now, solving for x,

$x+\frac{b}{2a}={\pm}\sqrt{\frac{-c}{a}+(\frac{b}{2a})^2}$

$x=\frac{-b}{2a}{\pm}\sqrt{\frac{-c}{a}+(\frac{b}{2a})^2}$

Multiply right side by $\frac{2a}{2a}$ ,

$x=\frac{-b{\pm}\sqrt{b^2-4ac}}{2a}$

which is the required quadratic formula.

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4 years ago

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What are the roots of the equation 9x^2-42x+50=0 in simplest a+bi form?

Lapatulllka [165]

Answer:

-7/3 +\- 1/3i

Step-by-step explanation:

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3 years ago