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4 years ago

Which are the solutions of x^2 = –5x + 8?

Mathematics

2 answers:

Elan Coil [88]4 years ago

8 0

The first one is the answer.

Vitek1552 [10]4 years ago

4 0

Your answer is A.

Use this helpful link.
https://www.symbolab.com/solver/radical-equation-calculator/x%5E%7B2%7D%20%3D%20-5x%20%2B%208

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The ratio of the diameters is 15:11. If the diameter of the smaller ball is 55cm, what is the volume of the larger ball? Round t

gizmo_the_mogwai [7]

Answer:

220,781.25 cubic cm

Step-by-step explanation:

Given ratio of the diameters = 15:11

Let the actual value of of diameters be 15x and 11x to maintain the ratio of 15:11

Given that smaller one has diameter of 55cm

thus 11x = 55cm

x = 55/11 cm = 5

Thus, diameter of larger ball = 15xcm= 15*5cm =75cm.

we know that radius is half of diameter

Radius = diameter/2

Thus radius of larger ball = 75/2 cm = 37.5 cm.

Volume of sphere is given by $(4/3)\pi r^3$

we know that ball has spherical shape

thus volume of larger ball is calculated as given below

$volume \ of \ ball = (4/3)\pi r^3\\=> volume \ of \ ball = (4/3)*3.14* 37.5^3\\=> volume \ of \ ball = (4/3)*3.14* 37.5^3\\=> volume \ of \ ball = 220,781.25$

Thus, volume of larger ball is 220,781.25 cubic cm

5 0

4 years ago

Hi guys I'm new here please follow me (sampathstar003)

zepelin [54]

Answer:

you cant follow you can friend also hello

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

The sum of three consecutive odd integers is -219. Find the largest integer.

oksian1 [2.3K]

Answer:

-75, -73, -71

Step-by-step explanation:

Let the numbers be:

x-2, x, x +2

The sum:

x + 2 +x + x+2 = -219
3x = -219
x = -73

The numbers:

-75, -73, -71

6 0

3 years ago

A certain circuit board consists of two resistors, green and red. The circuit board manufacturer has two huge bins filled with t

Lesechka [4]

Answer:

(a) 0.675

(b) 0.3

Step-by-step explanation:

$P(R) = 90\% = 0.9$ (Probability of functional red)

$P(\sim R) = 90\% = 1 - 0.9 = 0.1$ (Probability of non-functional red)

$P(G) = 75\% = 0.75$ (Probability of functional green)

$P(\sim G) = 1 - P(G) = 1 - 0.75 = 0.25$ (Probability of non-functional green)

(a) The probability the board is functional is the probability that the red and the green resistors are functional.

$P(\text{board is functional}) = P(R\cap G) = P(R) \times P(G) = 0.9\times0.75 = 0.675$

(b) The probability that exactly one of the resistors chosen is functional is the probability that either red is functional and green is not or green is functional and red is not.

$P(\text{exactly one is functional}) = P((R\cap \sim G) \cup (G\cap \sim R))$