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3 years ago

Can someone please help me in math?

Mathematics

1 answer:

yulyashka [42]3 years ago

3 0

Answer:

yes

Step-by-step explanation:

What you don't know. which chapter is hard for you?

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Chloe and Alexis are selling wrapping paper for a school fundraiser. Customers can buy rolls of

Degger [83]

Answer:

hold on let me do this math real quick

5 0

3 years ago

What is the equation of the axis of symmetry for the function shown below?

Gennadij [26K]

Answer:

x=2

Step-by-step explanation:

The axis of symmetry can be calculated using the following formula:

$Xv= \frac{-b}{2a}$

In order to use this formula, we need to have the function written in it's polynomial formula:

$f(x)=ax^{2} +bx+c$

In order to do so, we have to isolate Y from the excercise's formula.

$y=-2(x-2)^2-5$

Then we resolve the square of the binomial knowing that (a+b)^2=a^2+2.a.b+b^2

$(x-2)^2= x^2+2.x.(-2)+(-2)^2$

$(x-2)^2= x^2-4x+4$

Now we have that:

$y=-2.(x^2-4x+4)-5$

$y=-2x^2+8x-8-5$

$y=-2x^2+8x-13$

As we have now the polynomyal formula, we know that a=-2, b=8 and c=-13. We supplant on the formula and get:

$Xv= \frac{-b}{2a}$

$Xv= \frac{-8}{2.(-2)}$

$Xv= \frac{-8}{-4)}$

$Xv= 2$

4 0

4 years ago

Write 8/9<br> as a decimal.

luda_lava [24]

Answer: 0.88888889

Step-by-step explanation:

Just divide 8/9!

4 0

3 years ago

Read 2 more answers

Two consecutive odd numbers total -20 find the smaller

Yakvenalex [24]

Answer:

-9

Step-by-step explanation:

use an equation to solve this

consecutive means in succession, one after the other

since they're odd, both numbers have to be odd

let x be the first number

x+x+2=-20

+2 because if you only +1, one of the numbers would be even

2x+2=-20

-2. -2

2x=-22

x=-11

the smaller would be -9 since we are adding x and x+2 together

6 0

2 years ago

To find an equation for the line with slope -3 that passes through the point ( 4, 3 ), Dana wrote the following steps. Is he cor

Makovka662 [10]

Answer:

Step-by-step explanation:

$m=-3\\\\(4,3)=(x_1,y_1)\\\\$

Substitute values into point slope form

$y-y_1=m(x-x_1)\\\\y -3=-3(x -4)\\\\y-3=-3x +12\\\\y=-3x+12+3\\\\y=-3x+15$

3 0

3 years ago