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skelet666 [1.2K]
3 years ago
8

Can someone answer this soon?!?

Mathematics
1 answer:
Sever21 [200]3 years ago
6 0
First get all the terms on the same side:

x^2 + 7x - 4 = 0

Now solve using the quadratic formula which is:

\frac{-b±\sqrt{b^2 - 4ac} }{2a}

Plug in the values:

\frac{-7± \sqrt{49-4(1)(-4)} }{2}

So the answer is:

\frac{-7 ± \sqrt{65} }{2}
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Answer:

(1,2)

Step-by-step explanation:

The solution to the system is where the two lines cross.

They cross at x=1 and y=2

(1,2)

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The descriminant is b^2-4ac so for 26 it would be -5^2 - 4 (1) (7). The quadratic formula is -B plus or minus the square root of b squared minus 4ac over 2a
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Fofino [41]

Answer:

(1.25, - 5 )

Step-by-step explanation:

Given the 2 equations

- 4x + 3y = - 20 → (1)

4x + 2y = - 5 → (2)

Adding the 2 equations term by term will eliminate the x- term

5y = - 25 ( divide both sides by 5 )

y = - 5

Substitute y = - 5 into either of the 2 equations and solve for x

Substituting into (2)

4x + 2(- 5) = - 5, that is

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4x = 5 ( divide both sides by 4 )

x = \frac{5}{4} = 1.25

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Answer:

subject?

Step-by-step explanation:

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Can anyone help with this question pleasee
Vladimir [108]

Answer:

y = 1

Step-by-step explanation:

Given:

a^{3y - 5} = \frac{1}{a^2}

Apply the negative exponent rule

a^{3y - 5} = a^{-2}

The bases will cancel each other

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3y = 3

\frac{3y}{3} = \frac{3}{3}

y = 1

7 0
3 years ago
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