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2 years ago

Please help! Will give brainliest to CORRECT ANSWER!!

Mathematics

1 answer:

S_A_V [24]2 years ago

3 0

Answer:

x=y*6

Step-by-step explanation:

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Does anyone know the answer to this?

Maslowich

I only found b I’m still working on a anyways.

Answer:
339

Explain: 339+39= 378 you can divide 378 by 9 which is 42, 42 subtracted by 3 is 39

3 0

3 years ago

Use the quadratic formula to determine the exact solutions to the equation.

lawyer [7]

Answer:

x= 2.28

or, x= 0.219

Step-by-step explanation:

2x²-5x+1 =0

a= 2, b= -5 and c= 1

x= (-b + √(b²-4ac))/2a

= (5 + √(25-8))/4

= (5 + √17)/4

8 0

2 years ago

If DE=52 and EF=21 Find DF

Vesna [10]

The answer is 107

Vote Trump 2020

7 0

2 years ago

Find a number n when decreased by 9 equals 17

stira [4]

Answer:

26-9=17 26 is the answer

Step-by-step explanation:

7 0

2 years ago

Read 2 more answers

Give the properties for the equation -2x 2 - y + 10x - 7 = 0.

Sladkaya [172]

Given:

The quadratic equation is

$-2x^2-y+10x-7=0$

To find:

The vertex of the given quadratic equation.

Solution:

If a quadratic function is $f(x)=ax^2+bx+c$ , then

$Vertex=\left(\dfrac{-b}{2a},f(\dfrac{-b}{2a})\right)$

We have,

$-2x^2-y+10x-7=0$

It can be written as

$-2x^2+10x-7=y$

$y=-2x^2+10x-7$ ...(i)

Here, $a=-2,b=10,c=-7$ .

$\dfrac{-b}{2a}=\dfrac{-10}{2(-2)}$

$\dfrac{-b}{2a}=\dfrac{-10}{-4}$

$\dfrac{-b}{2a}=\dfrac{5}{2}$

Putting $x=\dfrac{5}{2}$ in (i), we get

$y=-2(\dfrac{5}{2})^2+10(\dfrac{5}{2})-7$

$y=-2(\dfrac{25}{4})+\dfrac{50}{2}-7$

$y=\dfrac{-50}{4}+25-7$

$y=\dfrac{-25}{2}+18$

On further simplification, we get

$y=\dfrac{-25+36}{2}$

$y=\dfrac{11}{2}$

So, the vertex of the given quadratic equation is $\left(\dfrac{5}{2},\dfrac{11}{2}\right)$ .

Therefore, the correct option is A.

3 0

2 years ago