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eduard
2 years ago
10

HELP find the a,b,c of this table​

Mathematics
1 answer:
fenix001 [56]2 years ago
6 0

Answer:

<em>a = b = 1 , c = - 8</em>

Step-by-step explanation:

ax² + bx + c = y

( - 5 )² a - 5b + c = 12

<em>c = - 8</em>

3² a + 3b + c = 4

25a - 5b - 8 = 12 ⇔ 25a - 5b = 20 ⇔ 5a - b = 4 ........ <em>(1)</em>

9a + 3b - 8 = 4 ⇔ 9a + 3b = 12 ⇔ 3a + b = 4 .......... <em>(2)</em>

<em>(1)</em> + <em>(2)</em>

8a = 8 ; <em>a = 1</em>

<em>b = 1</em>

<em>y = x² + x - 8</em>

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X-3y=1<br> -x+6y=-7<br><br> Solve the system using elimination <br> Type ordered pair
Vedmedyk [2.9K]

Answer:

x=-5, y=-2. (-5, -2).

Step-by-step explanation:

x-3y=1

-x+6y=-7

----------------

3y=-6

y=-6/3

y=-2

x-3(-2)=1

x+6=1

x=1-6

x=-5

3 0
3 years ago
A test has 20 question if peter gets 80% correct, how many question did peter miss
AlexFokin [52]

Answer:

16 questions right = 80%

So Peter missed 4 questions.

Hope this helps.

:-)

6 0
3 years ago
Read 2 more answers
12. (2v^3 - v + 8) + (-v^3 + v - 3)<br><br> 14. (4h^3 + 3h + 1) - (-5h^3 + 6h - 2)
Lana71 [14]
12. On addition, you can just combine like terms.
2v^3+(-v^3)=v^3
-v+v cancels each other out
8+(-3)=5
So you have v^3+5

14 On subtraction, you have to remember to distribute the negative sign so after you do that you have:
4h^3+3h+1+5h^3-6h+2
Then you can combine like terms
4h^3+5h^3=9h^3
3h-6h=-3h
1+2=3
So you end up with:
9h^3-3h+3

Hope that helps and feel free to ask any questions.
7 0
3 years ago
Please help whit all of them I can’t fail math it’s the only subject I’m failing in my mama would whoop me please
scoray [572]

I dunno I rlly don't know like seriously I'm in 7th

6 0
3 years ago
Solve for x<br> 20 points
torisob [31]

Answer:

x = 21 units

Step-by-step explanation:

<em>The tangent squared is equal to the secant's total length multiplied by the secant's length without the part inside the circle.</em>

So here, that will look like: <em>36² = 27 * (27 + x)</em>

Expansion and multiplication gives us: <em>1296 = 729 + 27x</em>

Subtract from both sides: <em>567 = 27x</em>

Divide from both sides: x = 21.

4 0
3 years ago
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