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Alex73 [517]
3 years ago
8

Translate the sentence into an equation.

Mathematics
2 answers:
DaniilM [7]3 years ago
5 0

Answer:

  • 2(y + 4) = 9

Step-by-step explanation:

<u>Two times the sum of a number and 4 equals 9:</u>

  • 2(y + 4) = 9
Yakvenalex [24]3 years ago
3 0

Answer:

The equation for this sentence is: 9 = 2(4y)

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Help asap!<br><br> Thanks in advance!<br><br> There's two questions btw:)
lutik1710 [3]

Answer:

[1].

Option A and D are correct.

[2].

Option A is correct

Step-by-step explanation:

[1].

Quadratic function states that it is an equation of second degree i.,e it contains at least one term that is squared.

The standard form of the quadratic equation is; ax^2+bx+c = 0

A.

y(y+4)-y = 6

Using distributive property: a\cdot (b+c) = a\cdot b + a\cdot c

y^2+4y-y=6

Combine like terms;

y^2+3y = 6

or

y^2+3y -6=0 which represents a quadratic equation.

B.

3a-7 = 2(7a-3)

3a-7 = 14a-6

or

11a+1 = 0 which is not a quadratic equation.

C.

(3x+2)+(6x-1) = 0

Combine like terms;

9x +1 = 0 which is not a quadratic equation.

D.

4b(b) = 0

4b^2 = 0 which represents the quadratic equation.

[2].

Given the parent function: y=x^2

The reflection rule over x axis is given by;

(x, y) \rightarrow (x, -y)

then

the function become: y = -x^2

Vertical shift:

If c is a positive real number, the graph y=f(x)+c is the graph of y =f(x) shifted upward c units.

If c is a positive real number, the graph y=f(x)-c is the graph of y =f(x) shifted downward c units.

then;

The graph y=-x^2-3 is the graph of y=-x^2 shifted 3 units down.

Therefore, the translation of the graph of  y=x^2 to obtain y=-x^2-3 is, reflect over the  x-axis and shift down 3




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