I would prefer you use quadratic formula. Each equation has at least a quadratic (x^2) term and are already equal to 0. They are in standard form, which is what you need to solve with the formula: ax^2 + bx + c = 0. It is okay if the linear term (bx) and/or constant (c) is missing.

5 0

3 years ago

Help with 3 math problems please i will upvote

aleksandrvk [35]

1. common differece, d = a2 - a1d = -8 - 9 = -17d = -25 - (-8) = -17
2. first is solve the common differece,dd = 10.5 - 13 = -2.5so an = 15.5 - 2.5n is the answer
3. a(x) = 440 + 65xwhere x is the number of weeksa(25) = 440 + 65(25)a(25) = $2065

5 0

3 years ago

From her house, Haley could drive due north to get to her parents' house or she could drive due east to get to her grandparents'

vivado [14]

Answer:

5.7km

Step-by-step explanation:

-let the drive east be the base of our 'triangle' and the drive north be the height, h.

-The distance from the parents to the grandparents, 9km, forms the hypotenuse.

#Using Pythagorean Theorem, we can find the distance to her grandparents as:

$H^2=h^2+b^2\\\\9^2=7^2+b^2\\\\b^2=81-49\\\\b=\sqrt{32}\\\\=5.657\approx5.7\ km$

Hence, the distance fro Hayley's place to her grandparents is 5.7km

5 0

3 years ago