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KonstantinChe [14]
2 years ago
15

Pls help I need a good grade

Mathematics
2 answers:
vesna_86 [32]2 years ago
8 0

Answer:

5

Step-by-step explanation:

subtract 28 on both sides

-3p = -15

Divide both sides by-3

p = 5

zvonat [6]2 years ago
6 0

Answer:

p=5

Step-by-step explanation:

28-13=3p

15=3p

p=5

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Is it a function or not a function and if why is it either a function or not a function?
Butoxors [25]

Answer:

function

Step-by-step explanation:

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3 years ago
Determine the slope intercept form of the equation of the line parrell to y=-4/3x+11
olasank [31]
M = -4/3 (slope stays the same)
so y= -4/3x + b
b = y intercept
without a point on the line I can’t figure out what exact line you were looking for but that equation with any value as b will give you a line parallel to the original.
7 0
3 years ago
If 1 inch on a map represents 20 miles, what is the mileage represented by 2.5 inches?
SOVA2 [1]

Answer:

50 miles(D)

Step-by-step explanation:

20 x 2.5

5 0
3 years ago
Alexis has $22 75 to spend at the movies she buys a ticket for $8.500 a popcorn for $725 and a candy bar for $5 how much money d
vaieri [72.5K]

Answer:

  • $2.00

Step-by-step explanation:

<u>Alexis spends:</u>

  • $8.50 + $7.25 + $5 = $20.75

<u>Money left:</u>

  • $22.75 - $20.75 = $2.00
6 0
3 years ago
Read 2 more answers
Type the correct answer in each box. (____)
trapecia [35]

Answer:

1. -16; 2. +64; 3. 16

Step-by-step explanation:

The formula for the volume of a cylinder is

V = πr²x

Data:

r = (x - 8)   mm

V = 1024π mm³

Calculations:

1. Find the cubic equation  

V = πr²h

1024π = π(x - 8)² × x

Divide each side by π

1024 = x(x - 8)²  

1024 = x(x² - 16x  + 64)

1024 =    x³ - 16x² + 64x

x³ - 16x² + 64x - 1024 = 0

2. Solve the cubic equation

The general formula for a third-degree polynomial is

f(x) = ax³ + bx² + cx + d

Your polynomial is  

f(x) = x³ - 16x² + 64x - 1024

a = 1; d = -1024

According to the <em>rational roots theorem</em>, the possible roots are

factors of d/factors of a

Factors of d = ±1, ±2, ±4, ±8, ±16, ± 32, ± 64, ±128, ±256, ±512, ±1024

Factors of a = ±1

Potential roots are x = ±1, ±2, ±4, ±8, ±16, ± 32, ± 64, ±128, ±256, ±512, ±1024

That's a lot of possibilities to check by trial and error. I will just use the one that works.

Try x = 16 by synthetic division.

16|1  -16   64  -1024

  <u>|     16     0   1024 </u>

   1     0   64        0

So,

(x³ - 16x² + 64x - 1024)/(x – 16) = x² + 64

and

(x - 16)(x² + 64) = 0

x - 16 = 0        x² + 64 =    0

     x = 16       x²         = -64

                       x          =  ±8i

There is only one real root: x = 16 mm

6 0
3 years ago
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