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leonid [27]
2 years ago
6

Solving quadratics equations by square root method

Mathematics
2 answers:
Zielflug [23.3K]2 years ago
7 0
Can you elaborate? are you
looking for an overall explanation or asking for a specific questions
Luba_88 [7]2 years ago
7 0

Answer:

Step-by-step explanation:

Here is an example:

3x^{2} +7=55

-7 on both sides of the equation

3x^{2} =48

divide by 3 on both sides

x^{2} =16

square root the x^{2} and 16

x=±4

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Emily wants to know the volume of a beach ball. She deduces that the beach ball has diameter of 12 inches, and then uses the fol
Over [174]

Answer:

D. She used the beach's ball's diameter when she should have used the radius

Step-by-step explanation:

To find the volume of the beach ball, using the volume of a sphere is the right formula to use, which is ⁴/3πr³.

The formula she used is correct.

Since the diameter of the ball is assumed to be 12 inches, what is needed to find the volume is the radius.

Radius (r) = ½(diameter) = ½(12) = 6 in.

This is where Emily made a mistake.

She used the diameter of the beach ball instead of its radius (r) which is needed in the equation.

She should have gotten,

V = ⁴/3(3.14)(6)² = 904.32 cubic inches

7 0
2 years ago
Mrs. Alberts has two seventh grade math classes this year. They took their final exam, and Mrs. Alberts just finished grading th
goldfiish [28.3K]

Answer:

these are true = 1, 3, 5

Step-by-step explanation:

overall class a scored better than class b

they're more students in class a compared to class b

7 0
3 years ago
The equation y=4x+4 estimates the number of U.S. households, in millions, expected to install devices that receive and manage br
Pepsi [2]

Answer:

X ≥9 years after 2009.

Step-by-step explanation:

Y=4x+4

Y-4=4x

X=(Y-4)/4

Y=number of U.S. households, in millions.

Y≥40

Y-4≥36

(Y-4)/4≥9

So, X≥9.

7 0
3 years ago
Which of the following are situations that can be modeled with a quadratic function? Select all that apply.
Lina20 [59]

Answer:

Option 2 and 5 are correct.

Step-by-step explanation:

We need to tell which one of them is quadratic function.

Option 1 is exponential decay so, it is not quadratic.

Option 2 is quadratic because the diver will take the parabolic shape when jumps.

Option 3 is not quadratic.Option 4 is not quadratic it is linear.

Option 4 is again exponential not quadratic.

Option 5 is quadratic because it takes the parabolic shape again.


4 0
3 years ago
Read 2 more answers
Question The set {78, 55, 22, 16, 84, 75, 33, 69, 58, 59} represents the number of stones in ten pouches. What is the midrange o
Citrus2011 [14]
<h3>Answer:  50</h3>

Explanation:

The original set

{78, 55, 22, 16, 84, 75, 33, 69, 58, 59}

sorts to

{16, 22, 33, 55, 58, 59, 69, 75, 78, 84}

The min and max are 16 and 84 respectively

Midrange = (min + max)/2 = (16+84)/2 = 50

3 0
2 years ago
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