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3 years ago

What sampling method could you use to find the percent of studnets in your grade?

1 answer:

7 0

$\frac{number \: of \: students \:with \: same \: grade}{number \: of \: all \: students \: with \: different \: grades} \times 100$
example:all students are 39
students with same grade are 16
so
$\frac{16}{39} \times 100 = 41\%$

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Write an equation for the polynomial function that has 2 and -3 + 5i as zero

AysviL [449]

Answer:

$p(x) = {x}^{3} + 4{x}^{2} + 22x- 68$

Step-by-step explanation:

We want to write an equation for the polynomial function with roots;

$x = 2$

and

$x = - 3 + 5i$

Note that complex roots come in pairs and in conjugates.

Therefore

$x = - 3 - 5i$

is also a root.

By the factor theorem:

(x-2), (x+3+5i), and (x+3-5i) are factors of the polynomial.

Let p(x) be the polynomial, then in factored form.

$p(x) = (x - 2)(x + 3 + 5i)(x + 3 - 5i)$

We expand now to get:

$p(x) = (x - 2)( {x}^{2} + 3x - 5ix + 3x + 9 - 15i + 5ix + 15i + 25)$

Simplify now

$p(x) = (x - 2)( {x}^{2} + 6x +34)$

We expand further;

$p(x) = x( {x}^{2} + 6x + 34) - 2( {x}^{2} + 6x + 34)$

$p(x) = {x}^{3} + 6 {x}^{2} + 34x - 2 {x}^{2} - 12x - 68$

$p(x) = {x}^{3} + 4{x}^{2} + 22x- 68$

8 0

3 years ago

Passes throw (1,-3),slope=1

EastWind [94]

Y=mx+b

-3=1(1)+b
-3=1+b
-3-1=1-1+b
-4=b

y=1x-4

7 0

3 years ago

Select all of the symbols that would make the comparison true.<br> -7__-4

Marysya12 [62]

Answer:uggvjyugjyrftkufiituu

Step-by-step explanation:

gggggggggggggggggggggggggggggggggggggggggggggggggg

3 0

3 years ago

Please answer assapapapapppp

Amanda [17]

That is the answer it was to long to write down

8 0

3 years ago

If victor based his decision only on gas efficiency which car should he buy

Alexus [3.1K]

Vehicle 1 = 18 miles per gallon
Vehicle 2 = 16.67 miles per gallon

Vehicle 1

7 0

3 years ago