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3 years ago

explain why is it important to line up decimals numbers by their place value when you add or subtract them

2 answers:

6 0

It is important because if you are adding and subtracfing and the decimals are off when your done with the equation you might end up with two decimals or numbers in the wrong place

butalik [34]3 years ago

4 0

So you can keep track of your problem and so you will have the place value of the problem correct

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The square of a number decreased by 15 is twice the number. find the number

jonny [76]

Answer:

x = 5, -3

Step-by-step explanation:

x² - 15 = 2x

x² - 2x - 15 = 0

(x - 5)(x + 3) = 0

6 0

3 years ago

A circle has the equation

Firlakuza [10]

Answer:

choice G. (-5, 2)

Step-by-step explanation:

(x + 5)^2 + (y - 2)^2 = 9

(x + 5)^2 + (y - 2)^2 = 3^2

center( -5, 2)

7 0

3 years ago

What is the approximate value of <br> f(x)= 74/1+2e^-1.5x

Anton [14]

Answer: Oblique Asymptotes: y = 2 x/ e^1.5

Step-by-step explanation: Find the asymptotes

brainliest or a thank you pls <33 :)

4 0

3 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

X÷79 + 72 - 18 hellppppp

tino4ka555 [31]

Answer:

1/5688x-18

I am not sure about my answer because I think the question is missing some information but my answer is 1/5688x-18. Thanks!

7 0

3 years ago