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3 years ago

Evaluate f(x) =x to the second power +1 for x=-3

Mathematics

1 answer:

kirill [66]3 years ago

7 0

Answer:

Step-by-step explanation:

f(-3) = (-3)^2 + 1 = 9 + 1 = 10

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Can someone help me please?

spayn [35]

Answer:

Gallons

Step-by-step explanation:

Since its a fish tank and in high diameter it would be used for a big measurement unit so the answer would be gallons.

3 0

3 years ago

Read 2 more answers

Simply the rational expression.state any restrictions on the variable. k2-k-2/k2-4k-5

hjlf

We are given

$\frac{k^2-k-2}{k^2-4k-5}$

Firstly, we will factor numerator and denominator

$\frac{k^2-k-2}{k^2-4k-5}=\frac{(k-2)(k+1)}{(k-5)(k+1)}$

Restrictions:

we know that denominator can not be zero

so, we can set denominator =0

and solve for k to get restrictions

$(k-5)(k+1)=0$

$k=-1,k=5$

Simplification:

$\frac{k^2-k-2}{k^2-4k-5}=\frac{(k-2)(k+1)}{(k-5)(k+1)}$

we can see that k+1 gets cancelled

so, we get

$\frac{k^2-k-2}{k^2-4k-5}=\frac{(k-2)}{(k-5)}$ ..........Answer

5 0

3 years ago

I need help evaluating

Alika [10]

I’m guessing 27 4? I’m not sure

7 0

3 years ago

Is the equation true false or open?<br> 4y+8=6y+3

emmasim [6.3K]

I think it's true but I'm not 100% sure

4 0

3 years ago

The number of basketball games that must be scheduled in a league with n teams is given by G(n) = (n2 - n)/2 where each team pla

Pani-rosa [81]

Answer:

There are 7 teams in the league

Step-by-step explanation:

Given that the number of games is given by:

$G(n) = \frac{(n^2-n)}{2}$

The equation will be used to determine the number of games. As we already know, that 21 games are scheduled which means G(n) is 21 so we have to find n when G(n) is 21

Putting this mathematically

$21 = \frac{n^2-n}{2}$

Multiplying equation by 2

$2*21 = 2*\frac{n^2-n}{2}\\42 = n^2-n\\n^2-n-42 = 0\\n^2-7n+6n-42 = 0\\n(n-7)+6(n-7) = 0\\(n-7)(n+6)=0\\n-7 = 0 => n=7\\n+6=0 => n=-6$

As the number of teams cannot be negative, the number of teams in league are 7.

Hence,

There are 7 teams in the league

3 0

3 years ago