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nlexa [21]
3 years ago
12

This really hard help please

Mathematics
1 answer:
bonufazy [111]3 years ago
8 0

Answer:

is it 4.8, I don't really know

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A parabola can be drawn given a focus of (-9, -7) and a directrix of x = 9. Write
Slav-nsk [51]

Check the picture below, so the parabola looks more or less like so, with a vertex at (0 , -7), let's recall the vertex is half-way between the focus point and the directrix.

so this horizontal parabola opens up to the left-hand-side, meaning that the "P" distance is a negative value.

\textit{horizontal parabola vertex form with focus point distance} \\\\ 4p(x- h)=(y- k)^2 \qquad \begin{cases} \stackrel{vertex}{(h,k)}\qquad \stackrel{focus~point}{(h+p,k)}\qquad \stackrel{directrix}{x=h-p}\\\\ p=\textit{distance from vertex to }\\ \qquad \textit{ focus or directrix}\\\\ \stackrel{"p"~is~negative}{op ens~\supset}\qquad \stackrel{"p"~is~positive}{op ens~\subset} \end{cases} \\\\[-0.35em] \rule{34em}{0.25pt}

\begin{cases} h=0\\ k=-7\\ p=-9 \end{cases}\implies 4(-9)(x-0)~~ = ~~[y-(-7)]^2 \\\\\\ -36x=(y+7)^2\implies x=-\cfrac{1}{36}(y+7)^2

4 0
2 years ago
Ava bought 7.73 pounds of fruit for a class party. the class ate 3.59 pounds of the fruit. how much fruit is left?
dem82 [27]

Ava bought 7.73 pounds of fruit for a class party , class ate 3.59 pounds fruits then 4.14 pounds fruit left after party.

How can we find how much fruit is left after party ?

Ava bought =7.73 pounds fruit

ate by class =3.59 pounds fruit

fruit left after party = total fruit -fruit ate by class

                                = 7.73-3.59\\=4.14

So 4.14 pound fruit is left .

Learn more about the fruit left here :

brainly.com/question/28048819

#SPJ4

6 0
2 years ago
A choir teacher is dividing 12 sopranos and 9 altos into singing groups. He wants each group to have the same combination of sop
almond37 [142]

Answer:

3 groups

Step-by-step explanation:

Sopranos = 12

Altos = 9

Find the highest common factor of 12 and 9

12 = 1, 2, 3, 4, 6, 12

9 = 1, 3, 9

The highest common factor of 12 and 9 is 3

Therefore, the choir teacher can only have 3 groups

12 sopranos / 3 groups

= 4 sopranos per group

9 Altos / 3 groups

= 3 altos per group

Each of the 3 groups Will have 4 sopranos and 3 altos each

3 0
3 years ago
Rewrite the expression with a rational exponent as a radical expression. (answers in photo)
OleMash [197]

Answer:

The answer is √5

Step-by-step explanation:

That's it

3 0
2 years ago
Given: PQ= TQ, UQ: QS
joja [24]

Answer:

The required prove is shown below.

Step-by-step explanation:

Consider the provided statement.

The required figure is shown below:

 Statement                                             Reasons

PQ ≅ TQ; UQ ≅ QS                               Given

PQ = TQ, UQ = QS                     Definition of Congruence

PQ + QS = PS; TQ+QU = TU    Segment Addition Postulate

TQ + QS = PS                            Substitution  (PQ = TQ)

TQ + QS = TU                            Substitution  (QU = QS)

PS = TU                                    Transitive Property

Prove: PS ≅TU                          Definition of Congruence

Hence, the required prove is shown above.

3 0
3 years ago
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