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nexus9112 [7]
3 years ago
5

George bought 30 packs of football cards.There were 14 cards in each pack.How many cards did George buy

Mathematics
1 answer:
emmainna [20.7K]3 years ago
6 0

Answer:

there would be 420 cards in total

Step-by-step explanation:


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4. Gloria the grasshopper is working on her hops.
aivan3 [116]

The path that Gloria follows when she jumped is a path of parabola.

The equation of the parabola  that describes the path of her jump is \mathbf{y = -\frac{5}{49}(x - 14)^2 + 20}

The given parameters are:

\mathbf{Height = 20}

\mathbf{Length = 28}

<em>Assume she starts from the origin (0,0)</em>

The midpoint would be:

\mathbf{Mid = \frac 12 \times Length}

\mathbf{Mid = \frac 12 \times 28}

\mathbf{Mid = 14}

So, the vertex of the parabola is:

\mathbf{Vertex = (Mid,Height)}

Express properly as:

\mathbf{(h,k) = (14,20)}

A point on the graph would be:

\mathbf{(x,y) = (28,0)}

The equation of a parabola is calculated using:

\mathbf{y = a(x - h)^2 + k}

Substitute \mathbf{(h,k) = (14,20)} in \mathbf{y = a(x - h)^2 + k}

\mathbf{y = a(x - 14)^2 + 20}

Substitute \mathbf{(x,y) = (28,0)} in \mathbf{y = a(x - 14)^2 + 20}

\mathbf{0 = a(28 - 14)^2 + 20}

\mathbf{0 = a(14)^2 + 20}

Collect like terms

\mathbf{a(14)^2 =- 20}

Solve for a

\mathbf{a =- \frac{20}{14^2}}

\mathbf{a =- \frac{20}{196}}

Simplify

\mathbf{a =- \frac{5}{49}}

Substitute \mathbf{a =- \frac{5}{49}} in \mathbf{y = a(x - 14)^2 + 20}

\mathbf{y = -\frac{5}{49}(x - 14)^2 + 20}

Hence, the equation of the parabola  that describes the path of her jump is \mathbf{y = -\frac{5}{49}(x - 14)^2 + 20}

See attachment for the graph

Read more about equations of parabola at:

brainly.com/question/4074088

7 0
2 years ago
What is the approximate area of a circle with a radius of 4 feet? Use 3.14
Eva8 [605]

Answer:

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Step-by-step explanation:

<u>Area of circle:</u>

  • A = πr²

<u>Given:</u>

  • r = 4 ft, π = 3.14

<u>Then:</u>

  • A= 3.14 * 4² = 50.24 ≈ 50 ft²
8 0
3 years ago
a right rectangular prism has a base area of 20cm2 and a height of 9.2cm. what is the volume of the prism ??
Tanzania [10]
52.4 because the rectangular prism
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3 years ago
PLEASE HELP, I WILL MOVE TO A DIFFERENT SCHOOL IF I DONT PASS!!!!
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Is there a picture i could see or something?
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3 years ago
Answer ASAP please ?
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R=3 this is the answer...
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