Use quadratic regression to find the equation for the parabola going through these three points (-7,134)(-3, 10)(5,50) Please help me! Thanks

Step-by-step explanation:

y = ax² + bx + c

a( - 7)² + b( - 7) + c = 134 ⇔ 49a - 7b + c = 134 (1)

a( - 3)² + b( - 3) + c = 10 ⇔ 9a - 3b + c = 10 (2)

a(5)² + b(5) + c = 50 ⇔ 25a + 5b + c = 50 (3)

(1) - (2)

40a - 4b = 124 ⇔ 10a - b = 31 (4)

(3) - (2)

16a + 8b = 40 ⇔ 2a + b = 5 (5)

(4) + (5)

12a = 36 ⇒ a = 3

2(3) + b = 5 ⇒ b = - 1

9(3) - 3( - 1) + c = 10 ⇒ c = - 20

y = 3x² - x - 20

y = [ 3 ] x² + [ - 1 ] x + [ - 20 ]

$450.00 for 6 weeks

or

$300

step-by-step explanation:

$200.00 for first week $50.00 x5 equals $250 plus $200 equals $450.00 for six weeks.

$200 for first week

$200 x 0.10 = $20

$20 x 5 = $100

$200 + $100 = $300

the simplified form is

step-by-step explanation:

we want to simplify the expression,

let us change the middle bar to a normal division sign to obtain,

we multiply the first fraction by the reciprocal of the second fraction to obtain,

we factor to obtain,

we cancel the common factors to get,

we simplify to get,

the correct answer is b