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stepan [7]
2 years ago
14

"absmiddle" class="latex-formula">
​
Mathematics
1 answer:
aleksklad [387]2 years ago
8 0

Answer:

8 is your answer ^_^

Step-by-step explanation:

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The line of symmetry for the quadratic equation y = ax^2 + 8x - 3 is x = 4. What is the value of "a"?
alexdok [17]

Answer:

a = - 1

Step-by-step explanation:

given a quadratic in standard form : y = ax² + bx + c : a ≠ 0

Then the x-coordinate of the vertex is

• x_{vertex} = - \frac{b}{2a}

The line of symmetry passes through the parabola, hence x-coordinate is 4

y = ax² + 8x - 3 is in standard form

with a = a, b = 8 and c = - 3, hence

- \frac{8}{2a} = 4 ( multiply both sides by 2a

- 8 = 8a ( divide both sides by 8 )

a = - 1



















6 0
3 years ago
Video games sold: x
Nata [24]

Answer:

<u>The correct answer is D. 53x - 12</u>

Step-by-step explanation:

Let's find P(x), this way:

Profits = Revenue - Cost

Profit function = Revenue function - Cost function

P (x) = R (x) - C (x)

Replacing with the real values we have:

P (x) = 60x - (12 + 7x)

P (x) = 60x - 12 - 7x

P (x) = 53x - 12

<u>The correct answer is D. 53x - 12</u>

6 0
3 years ago
78 is what percent of 110
irinina [24]

Answer: 70.909090909091%

Step-by-step explanation: Reading through the problem we have <em>78 is</em>, that's 78 equals, <em>what percent</em>, x/100, <em>of 110</em>, times 110.

It's important to understand that <em>percent</em> means over 100 so what percent would simply mean <em>x/100</em> or any variable but I will be using x.

So we have the equation 78 = \frac{x}{100} *110

So cross canceling the 110 and 100 to 11 and 10, we have 78 = \frac{11x}{10}

Multiply both sides by 10 to get rid

of the fraction and we have 780 = 11x.

Now divide both sides by 11 and 70.909090909091 = x.

So, 78 is 70.909090909091% of 110.

Work is attached in the image provided.

8 0
3 years ago
Algebraic expressions
Ede4ka [16]

Answer:

10y^2-3xy+6x

Step-by-step explanation:

7 0
3 years ago
Labron has $15,300 of total liabilities and $52,580 of total assets.what is his net worth​
Vinvika [58]

Answer:

.......................

6 0
2 years ago
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