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BlackZzzverrR [31]
3 years ago
11

What is the solution set of this inequality y+6.5 ≤ 28

Mathematics
1 answer:
vazorg [7]3 years ago
4 0

Answer: y=2 so 2+6.5<u> < </u>28

Step-by-step explanation:

2+6.5<u> < </u>28  

This is correct because 2+6.5= 8.5 and 8.5 is less than 28.

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jesse is putting a ribbon around a square frame. He uses 24 inches of ribbon. How long is each side of the frame
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Add brackets to the following equation to make it time. 1 + 72 ÷4 × 2 =10
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Answer:

1 + 72 ÷4 × 2 =10 with brackets it equals 10

1 + (72 ÷ (4 × 2)) =10

Step-by-step explanation:

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3 years ago
What is the value of z in the equation 2(4z − 3 − 1) = 166 − 46?
ZanzabumX [31]
In this equation z=16
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hey, can someone please double check these questions for me / or help me solve them if they are incorrect? thank you U-U ​
zzz [600]

Question 11

The directrix is a horizontal line, which means the parabola opens either upward or downward. In this case, it opens downward. This is because all answer choices have a negative leading coefficient. Also, it's because the focus is below the directrix.

For vertically opening parabolas, we use this form

4p(y-k) = (x-h)^2

where (h,k) is the vertex and p is the focal distance, aka the distance from the vertex the focus. To find (h,k), we start at the focus (0,-4) and move directly up until we reach the directrix y = 4. We'll arrive at (0,4). The midpoint of (0,-4) and (0,4) is (0,0) which is the vertex's location. So (h,k) = (0,0).

Note that in moving from (0,-4) to (0,4) is a span of 4 units. So this is the value of p.

Plug h = 0, k = 0, p = 4 into the equation mentioned and solve for y

4p(y-k) = (x-h)^2

4*4(y-0) = (x-0)^2

16y = x^2

y = (1/16)x^2

The only adjustment we need to make is to change the 1/16 to -1/16 so that the parabola opens downward.

<h3>Answer:  Choice D.  y = -(1/16)x^2</h3>

===============================================

Question 3

The given equation is in the form y = ax^2+bx+c

In this case,

  • a = 2
  • b = 4
  • c = 3

Let's compute the x coordinate of the vertex h

h = -b/(2a)

h = -4/(2*2)

h = -1

This h value is plugged into the original function to find k

f(x) = 2x^2+4x+3

f(-1) = 2(-1)^2+4(-1)+3

f(-1) = 1

We find that h = -1 and k = 1 pair up together. In short, (h,k) = (-1,1) is the vertex.

<h3>Answer: Choice B.  (-1,1)</h3>
8 0
2 years ago
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