**Answer: oof**

**Step-by-step explanation:**

**Answer:**

k = 5

**Step-by-step explanation:**

Now comparing left hand side & right hand side ,

Cancelling x^2 & 6 from both left hand side & right hand side ,

kx = 5x

=> k = 5

**Answer:**

At both 0.78 and 1.3 seconds, to the nearest hundredth, the ball will be at 20 feet.

**Step-by-step explanation:**

We can use two approaches to finding the answer: Calculation and Graphing.

<u>**Calculation:**</u>

Set h to 20 feet and solve the equation using the quadratic formula.

h= 4 + 33t - 16t^2

20= 4 + 33t - 16t^2

- 16t^2 + 33t + 4 = 20

- 16t^2 + 33t + -16 = 0

Solve using the quadratic formula. I find solutions of 0.779 and 1.28 seconds.

<u>**Graphing:**</u>

See the attached graph.

The ball is at 20 feet at 0.783 seconds on the way up and 1.28 seconds on the way back down.

===

Both approaches agree: 0.78 and 1.3 seconds, to the nearest hundredth, the ball will be at 20 feet.

Note how all four answer choices begin with "x=-2(." This tells us that we have the graph of a horizontal parabola that opens to the left, because of the "-" symbol.

Given that the vertex is located at (-1,-3), we know that the (y-c) term must be (y-[-3]), or (y+3). Thus,we can immediately eliminate answer choices b and d

The only answer choice that fits this situation is (a): x = -2(y+3) - 1.

**Answer:**

-5/2

**Step-by-step explanation:**

to find the slope of the line, you have to do y1 - y2, over x1 - x2. That means that you do -5/2, and so that is the answer