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3 years ago

I have no idea how to do these

Mathematics

1 answer:

Scorpion4ik [409]3 years ago

7 0

Answer:

You have the correct answer it is the third one.

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Is there a way to simplify the process of plugging in factors through synthetic division to find the zeros of a polynomial? I am

Iteru [2.4K]

Yes you can use the discriminant of a quadratic/polynomial. For instance, if
$b^2 - 4ac = 0$ there is one real root. If $b^2 - 4ac > 0$ there are two real roots and i $b^2 - 4ac < 0$ there are no real roots

The discriminant comes from the quadratic equation, which is the following.
$x = \frac{-b \pm \sqrt{b^2-4ac}}{2a}$

4 0

3 years ago

You have $65 to spend on party favors. On the internet, you find visors that cost that cost $6 each. The shipping and handling c

olchik [2.2K]

Answer:

10 visors

Step-by-step explanation:

Make an equation

Each visor, v costs $6, and there is a $5 fee regardless of the amount of visors purchased. This must be equal to $65

6v+5=65

Now, solve for v

Subtract 5 from both sides

6v=60

Divide both sides by 6

v=10

You can buy 10 visors

6 0

3 years ago

Read 2 more answers

8. You recorded the time in seconds it took for 8 participants to solve a puzzle. The times were: 15.2, 18.8, 19.3, 19.7, 20.2,

kirill115 [55]

Answer:

Xbar = 20.813

Median = 19.95

5 - number summary :

Minimum = 15.2

Q1 = 19.05; Q2 = 19.95 ; Q3 = 21.95 ; maximum = 29.4

Standard deviation, s = 4.068

Step-by-step explanation:

Given the data:

X : 15.2, 18.8, 19.3, 19.7, 20.2, 21.8, 22.1, 29.4

Ordered data:

15.2, 18.8, 19.3, 19.7, 20.2, 21.8, 22.1, 29.4

The mean (xbar) :

Xbar = Σx / n ; n = sample size = 8

Xbar = 166.8 / 8 = 20.8125

Xbar = 20.813

The median :

1/2 *(n+1)th term

1/2(9) = 4.5

(4 + 5)th term / 2

(19.7 + 20.2) / 2 = 19.95

The five number summary :

Minimum = 15.2

Lower quartile (Q1) = 1/4(9) = 2.25 ; (2nd + 3rd) term / 2

(18.8 + 19.3) / 2 = 19.05

Median (Q2) = 19.95

Upper quartile (Q3) :

3/4(9) = 6.75 = (6th + 7th) / 2

(21.8 + 22.1) / 2 = 21.95

Maximum = 29.4

The standard deviation, s = sqrt[(x - xbar)²/ (n-1)]

Using calculator ;

s = 4.068

4 0

3 years ago

Jayson’s car can go 300 miles on 12.5 gallons of gasoline. How far can he drive on 42 gallons of gas?

fomenos

$300\ miles\ on\ 12,5\ gallons\\
x\ miles\ \ on\ \ \ 42\ gallons\\\\
Making\ proportion:\\
300-12,5\\
x-42\\\\
Cross\ multiplication\\
300*42=12,5x\\\\12600=12,5x\ \ \ | divide\ by\ 12,5\\\\
x=1008\\\\
He\ can\ drive\ 1008\ miles\ on\ 42 \ gallons\ of\ gas.$

6 0

3 years ago

Sanji scored 125 points in the first round of a video game and 263 points in the second round. His total score after the third r

GaryK [48]

Sanji scored 44 points more in the third round than in the first round.

4 0

2 years ago