A) SAS

(−3y^2−7y−9)−(4y^2+6y+9). To solve this you must:
Distribute the negative sign like this:
=−3y^2−7y−9+−1(4y^2+6y+9)
=−3y^2+−7y+−9+−1(4y^2)+−1(6y)+(−1)(9)
=−3y^2+−7y+−9+−4y^2+−6y+−9
Then combine Like Terms:
=−3y^2+−7y+−9+−4y^2+−6y+−9
=(−3y^2+−4y^2)+(−7y+−6y)+(−9+−9)
=−7y^2+−13y+−18
So you would get an answer of −7y^2−13y−18.
Hope this helped!

3 0

4 years ago

Read 2 more answers

On a average day a horse might drink 50 la sheep might drink 4 l and a chicken might drink 200ml how much water would a farm wit

horsena [70]

Horse- 50l
sheep-4l
chicken-200ml

first you have to convert all the symbols into one, so we'll convert liters into milliliters,

1000ml=1l

horse= 50 ×1000=50000ml
sheep=4×1000=4000ml
chicken= 200ml

so now we have to multiply them by the number of animals,

h=50000ml×3=150000ml
s=4000×15=60000ml
c=200×12=2400ml

now add them together,

150000+60000+2400=212400ml

convert it into litres,
212400÷1000=212.4l

answer= 212.4 l

8 0

4 years ago

How do I find the vertex and the standard form? Plz explain

xenn [34]

Answer:

Vertex form

y = -4(x + 3)^2 + 10

Standard form;

y = -4x^2-24x - 26

Step-by-step explanation:

Mathematically, we have the vertex form as

y = a(x-h)^2 + k

(h,k) represents the vertex

We have h as -3 and k as 10

y = a(x+3)^2 + 10

To get a, we substitute any of the points

Let us use (-1,-6)

-6 = a(-1+3)^2 + 10

-6-10 = 4a

4a = -16

a = -16/4

a = -4

So we have the equation as;

y = -4(x+3)^2 + 10

For the standard form;

We expand the vertex form;

y = -4(x + 3)(x + 3) + 10

y = -4(x^2 + 6x + 9) + 10

y = -4x^2 - 24x -36 + 10

y = -4x^2 -24x -26

7 0

3 years ago