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3 years ago

Guys help me yall for 20 point

Mathematics

2 answers:

shtirl [24]3 years ago

5 0

Answer:

-9

Step-by-step explanation:

9 divided by -9 is -1

-1 +4 = 3

igomit [66]3 years ago

4 0

Answer:

Step-by-step explanation:

9/m+4

9/3+4 (m=3)

3+4

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What is the vertex form of y=2x^2-8x+1

bezimeni [28]

Answer:

$2(x-2)^2-7$

Step-by-step explanation:

$y=2x^2-8x+1$

When comparing to standard form of a parabola: $ax^2+bx+c$

$a=2$
$b=-8$
$c=1$

Vertex form of a parabola is: $a(x-h)^2+k$ , which is what we are trying to convert this quadratic equation into.

To do so, we can start by finding "h" in the original vertex form of a parabola. This can be found by using: $\frac{-b}{2a}$ .

Substitute in -8 for b and 2 for a.

$\frac{-(-8)}{2(2)}$

Simplify this fraction.

$\frac{8}{4} \rightarrow2$

$\boxed{h=2}$

The "h" value is 2. Now we can find the "k" value by substituting in 2 for x into the given quadratic equation.

$y=2(2)^2-8(2)+1$

Simplify.

$y=-7$

$\boxed{k=-7}$

We have the values of h and k for the original vertex form, so now we can plug these into the original vertex form. We already know a from the beginning (it is 2).

$a(x-h)^2+k\\ \\ 2(x-2)^2-7$

6 0

3 years ago

What is the average of 63 and 148

fgiga [73]

The average is 105.5. To find the average, you have to add up all numbers, 63+148=211. Now you have to divide by how many numbers there are, 211÷2=105.5

8 0

4 years ago

It was reported that about 80% of airline tickets-nearly $65 billion worth last year are issued over the internet. What were the

frozen [14]

Answer:

The answer is nearly $81 billion.

Step-by-step explanation:

If we know that 80% of airline tickets worth $65 billion, then $65=80\%\plus{Total_{tickets}}=0.8\plus{Total_{tickets}}\\$ .
Then,to know how much billion dollars worth the total tickets, we just have to clear out $Total_{tickets}$ of the equation, by dividing both sides by 0.8, which yields $\frac{65}{0.8}=Total_{tickets}=81.25$