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nydimaria [60]
3 years ago
13

Please help me ?!!!!!!!!!

Mathematics
1 answer:
vagabundo [1.1K]3 years ago
3 0
2/8 = 1/4 because there is the number 4 on there 2 times out of the 8 pieces. The Answer is 1/4
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Three friends each have some ribbon. Carol has 90 inches of ribbon, Tino has 10.5 feet of ribbon, and Baxter has 3.5 yards of ri
egoroff_w [7]
There are 342 inches, 28.5 feet, and 9.5 yards
6 0
3 years ago
Hailey plans to buy some items from the concession stand at the movie theater. The prices listed in the chart do not include tax
Triss [41]
Answer: C 17.55

Explanation:
Popcorn: $7.75
Soda: $5.15
Bag of Candy: $4.65

7.75 + 5.15 = 12.90 + 4.65 = 17.55

Hope this helps! :) (could you give me brainliest I need help ranking up loll)

6 0
3 years ago
City records showed that 0.8% of new homes had no
storchak [24]

Answer:

The decimal would be 0.008.

If you wanted a fraction in simplest form, it would be 1/125.

Step-by-step explanation:

0.8% divided by 100 (move the decimal in the percent two places to the left) = 0.008

0.008 as a fraction is 8/1000, and then you divide both numbers by their GCF of 8, which will give you a fraction in simplest form of 1/125.

I hope this helps!

3 0
3 years ago
A parabolic microphone used on the sidelines of a professional football game uses a reflective dish 24 in. wide and 5 in. deep.
madreJ [45]

Answers:

(1 Question in written form): 7.2 inches.

(2 Question in the picture): Option (D) (y+1)^2=2(x+3) and  F=(\frac{-5}{2},-1) and x=\frac{-7}{2}

Explanations:

1. (Question in written form):

First you need to know the standard form of a parabola (considering it opens in +x direction and the vertex of the parabola is at origin), which is as follows:

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

Since the vertex of the parabola is at origin, h = 0 and k = 0. The above equation will now become:

y^2 = 4px ---- (A)


Where p is the distance between the vertex and the focus of a parabola, which we need to find (or where the microphone should be placed).

As the vertex is assumed to be placed at the origin, the parabolic dish, which is 24 inches wide, will be split evenly on both sides of the y axis (as the opening of the parabola is in x-axis—stated above), giving the distance of 12 inches from each sides of y axis (12 inches + 12 inches = 24 inches). Since it (parabolic microphone) is 5 inches deep, the coordinates will become: (5, +12) and (5, -12).

Plug any of the points—(5,+12) or (5,-12)—in equation (A), you will get the following:

(12)^2 = 4p(5) \\ 144 = 4p(5) \\ \frac{144}{5} = 4p \\ \frac{144}{5*4} = p \\ p=7.2\thinspace inches

Hence, the correct answer is 7.2 inches.


2. (Question in the picture):

First we need to write the following equation in the standard form:

y^2 - 2x + 2y -5 = 0 ----- (B)


The standard form of parabola is:

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


Rearrange equation (B) and solve as follows:

y^2-2x+2y-5=0 \\ y^2 + 2y - 5 = 2x \\ y^2 + 2y +1 = 2x + 6 \\ y^2 + y + y + 1 = 2(x+3) \\ y(y+1)+1(y+1)=2(x+3)\\(y+1)^2=2(x+3)

You can write the above equation as follows:

(y-(-1))^2 = 4(\frac{1}{2})(x-(-3)) ----- (D)

Now compare equation (D) with (C), we will get:

Focus = (h+p, k) = (-3+(1/2), -1)

Focus: (\frac{-5}{2},-1)


Now, to find x, use the following formula:

x = h - p

x = -3-\frac{1}{2} = \frac{-7}{2}


Hence, the correct option is (D) -> F=(\frac{-5}{2},-1) and x=\frac{-7}{2}

4 0
2 years ago
Find 5 common multiples of 3 and 7
Yuliya22 [10]
3:6,9,12,15,18
4:8,12,16,20,24
3 0
3 years ago
Read 2 more answers
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