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3 years ago

I don’t understand this at all someone please help

Mathematics

1 answer:

olasank [31]3 years ago

5 0

Answer:

15-9=

6 ok I don't know if it's correct

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What fraction is greter than 3 - 5

Julli [10]

Answer:

4/5 is greater

Step-by-step explanation:

7 0

2 years ago

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

3 years ago

25 points please help me!

lianna [129]

$1.14 1.40 x 0.8=1.12 1.4+ 1.12=1.52 * 0.25 = 1.14

8 0

3 years ago

Who can answer this first POINTS

lilavasa [31]

Answer:

$1.45

Step-by-step explanation:

4 0

3 years ago

The hourly wage for an employee is $11.5 per hour. The employee also earns 80 cents for each item they manufacture during the wo

Dovator [93]

Answer:

x = 11.5h+.8q

Step-by-step explanation:

x = the total salary made in a day

11.5 represents the 11.5 he earns per hour. You then add this to the 80 cents (.8) he makes per product (q)

6 0

3 years ago