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3 years ago

Devin is collecting signatures for a petition to open a new park in her town. She needs to collect at least 1,000

Mathematics

1 answer:

Paraphin [41]3 years ago

3 0

Answer:

P = t - f

Step-by-step explanation:

First we need to find how many pages in total she needs so 1,000/80 - 12.5 so 13 pages. Then 380/80 4.75 of a page filled so subtract that from 12.5 to get 8 pages left to fill.

let p = pages left to fill

let T = total pages needed

let F = pages already filled

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Please help...trying to help my son with Alegebra, but it's been 30 years.

xz_007 [3.2K]

Wait it says ur in high school so u can't be over 30. that isn't possible. So what's the problem here? not good at math.

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3 years ago

Using the slope formula, find the slope of (1,-5) and (3,-17) pls pls help pls

inysia [295]

Answer:

-6

Step-by-step explanation:

5 0

3 years ago

Answer correct you get brainliest answer

zloy xaker [14]

Answer:

$y = {x}^{2} - 2$

Or if you want with the value of h too.

$y = {(x - 0)}^{2} - 2$

Step-by-step explanation:

$y = a {(x - h)}^{2} + k$

Find the value of h and k by using the formula.

$h = - \frac{b}{2a} \\ k = \frac{4ac - {b}^{2} }{4a}$

From y = x²-2

$a = 1 \\ b = 0 \\ c = - 2$

Substitute these values in the formula.

$h = - \frac{0}{2(1)} \\ h = 0$

Therefore, h = 0.

$k = \frac{4(1)( - 2) - {0}^{2} }{4(1)} \\ k = \frac{ - 8}{4} \\ k = - 2$

Therefore, k = - 2.

From the vertex form, the vertex is at (h, k) = (0,-2). Substitute h = 0, a = 1 and k = -2 in the equation.

$y = a {(x - h)}^{2} + k \\ y = 1 {(x - 0)}^{2} - 2 \\ y = {(x)}^{2} - 2 \\ y = {x}^{2} - 2$

These type of equation where b = 0 can also be both standard and vertex form.

4 0

3 years ago

Write a polynomial equation with roots 5 and -9i. X^3-?x^2+?X-?=0

jek_recluse [69]

Answer:

x³ - 5x² + 81x - 405 = 0

Step-by-step explanation:

Complex roots occur in conjugate pairs.

Thus given x = - 9i is a root then x = 9i is also a root

The factors are then (x - 5), (x - 9i) and (x + 9i)

The polynomial is the the product of the roots, that is

f(x) = (x - 5)(x - 9i)(x + 9i) ← expand the complex factors

= (x - 5)(x² - 81i²) → note i² = - 1

= (x - 5)(x² + 81) ← distribute

= x³ + 81x - 5x² - 405, thus

x³ - 5x² + 81x - 405 = 0 ← is the polynomial equation

6 0

3 years ago

Item 31 Simplify (3x3y0x−2)4⋅(y2x−45xy−8)3. Write your answer using only positive exponents. Evaluate any numerical powers. The

madam [21]

Answer:

1032xy + 72

Step-by-step explanation:

(3x3y0x-2)4(y2x-45xy-8)3=

(0-2)×4(2xy-45xy-3)×3=

-2×4(2xy-45xy-3)×3=

-2×4(-43xy-3)×3=

-24(-43xy-3)

1032xy+72

8 0

3 years ago