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4 years ago

2x - 2 = -18 X answer

Mathematics

2 answers:

strojnjashka [21]4 years ago

8 0

2x-2+18=0
2x+16=0
X=-18

amid [387]4 years ago

6 0

Answer:

x = -8

Step-by-step explanation:

$2x - 2 = - 18$

Collect like terms and simplify

$2x = - 18 + 2 \\ 2x = - 16$

Divide both sides of the equation by 2

$\frac{2x}{2} = \frac{ - 16}{2}$

Simplify

$x = - 8$

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The number of games, g, to be played with n teams can be written by the following equation: g=n^2-n if there are to be 132 games

Tema [17]

The equation that describes the relation between the number of games (g) and the number of teams (n) is given as follows:
g = n^2 - n

Now, we are given that the number of games is 132. This means that g=132. To know the number of teams, substitute with the given g in the given equation as follows:
g = n^2 - n
132 = n^2 - n
n^2 - n - 132 = 0 .......> factorize this expression
(n-12)(n-11) = 0
This means that:
either n = 12 teams
Or n = -11 teams (this solution is rejected as the number of teams cannot be negative)

Therefore, based on the above calculations, if the number of games is 132, then, the number of teams is 12

3 0

3 years ago

For the graph find a) b) c) and d)

Whitepunk [10]

Answer:

$f(0) = -1$

$f(\pi) = 1$

Domain: All real numbers

$Range = [-1,1]$

Step-by-step explanation:

Given

The attached graph

Solving (a): f(0)

On the attached graph

$f(x) = -1$ when $x =0$

So:

$f(0) = -1$

Solving (b): f(pi)

On the attached graph

$f(x) = 1$ when $x =\pi$

So:

$f(\pi) = 1$

Solving (c): Domain

There is no restriction on x.

Hence, the domain is the set of all real numbers

Solving (d): Range

In the attached graph

$y_{min} = -1$

$y_{max} = 1$

So, the range is:

$Range = [-1,1]$

5 0

3 years ago

A bacteria colony on an area of 500 cm^2 has a population density of 2,500 bacteria/cm^2? Find the bacteria population in the ar

dexar [7]

Answer:

$\large \boxed{\text{A. 1 250 000 bacteria }}$

Step-by-step explanation:

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