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VikaD [51]
2 years ago
5

What is the value of y?

Mathematics
1 answer:
horrorfan [7]2 years ago
5 0

Answer:

<h2>48 is the total value of y</h2>
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Help me with this one
Artist 52 [7]

9514 1404 393

Answer:

  "complete the square" to put in vertex form

Step-by-step explanation:

It may be helpful to consider the square of a binomial:

  (x +a)² = x² +2ax +a²

The expression x² +x +1 is in the standard form of the expression on the right above. Comparing the coefficients of x, we see ...

  2a = 1

  a = 1/2

That means we can write ...

  (x +1/2)² = x² +x +1/4

But we need x² +x +1, so we need to add 3/4 to the binomial square in order to make the expressions equal:

  x^2+x+1\\\\=(x^2+x+\frac{1}{4})+\frac{3}{4}\\\\=(x+\frac{1}{2})^2+\frac{3}{4}

_____

Another way to consider this is ...

  x² +bx +c

  = x² +2(b/2)x +(b/2)² +c -(b/2)² . . . . . . rewrite bx, add and subtract (b/2)²*

  = (x +b/2)² +(c -(b/2)²)

for b=1, c=1, this becomes ...

  x² +x +1 = (x +1/2)² +(1 -(1/2)²)

  = (x +1/2)² +3/4

_____

* This process, "rewrite bx, add and subtract (b/2)²," is called "completing the square"—especially when written as (x-h)² +k, a parabola with vertex (h, k).

5 0
2 years ago
A 9 inch candle burns -2/3 inch per hour. How long will it take the candle to burn completely?
Luda [366]
Gbbdnn sbxrbrndmndnsmxnnnbbbd
5 0
3 years ago
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Emily lived in a blue house for 4.5 years. Then she lived in a yellow house for 3.6 years. How many years did Emily live in the
ikadub [295]
You add 3.6 plus 4.5 and you get 8.1 years
8 0
3 years ago
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Markuo spends $27 on some plants. Each plant costs $9. How many plants does he buy?
kicyunya [14]

Answer:

He can buy 3 plants

Step-by-step explanation:

$27 is the total amount of money he can spend, if each plant costs $9 the equation would be like this:

9x = 27

Divide 27 by 9 because division is the opposite operation to multiplication

x = 3

6 0
3 years ago
There are 20 students on the schools student council. A special homecoming dance committee is to be formed by randomly selecting
babymother [125]
You have to take 20/7 and you get a answer of <span>2.85 as a decimal. or a mixed number of 2 17/20</span>
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