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3 years ago

Solve a=2b-c for b Can someone help me

Mathematics

1 answer:

Sauron [17]3 years ago

3 0

Answer:

$b=\frac{a}{2} +\frac{c}{2}$

Explanation:

While solving literal equations could be quite overwelhming, simply solve it by using normal equation solving methods.

For example, if you were to solve 2x + 3 = 9

You would add 3 on both sides and divide both sides by 2 to determine x.

Do the same thing for literal equations, and if in doubts, plug in numbers to check your work.

Step-by-step explanation:

For this problem, add c on both sides, we do this because we are aiming to eliminate the c from both sides.

a+c =2b

In order to find the value of b, divide both sides by 2, we do this because we want to get rid of the coefficient.

This should leave you with the answer of b=a/2 + c/2

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3 years ago

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3 years ago

If g(x) is the inverse of f(x), what is the value of f(g(2)?

erica [24]

<h3>Answer: C) 2</h3>

============================================================

Explanation:

g(x) is the inverse of f(x), which tells us that g undoes everything f(x) does.

If we input x = -6 then f(x) outputs 1

g(x) then reverses this to say that g(1) = -6. The inputs and outputs swap roles.

Moving to row 2, we see that f(-3) = 2 which reverses to g(2) = -3

We'll replace the g(2) with -3 to go from

f( g(2) )

f( -3 )

-3 isn't the answer, but I wanted to put it in bold to show how the replacement is happening.

From the table, we see that f(-3) = 2 which is the final answer

In other words, f(g(2)) = 2

------------------------------

Side note:

We can say that f(g(x)) = x for any number x in the domain of g(x).

As another example, g(3) = 5 and f(g(3)) = f(5) = 3.

The same works the other way around meaning that g(f(x)) = x.

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3 years ago

Read 2 more answers

Help plz will be marked brainlyist

garik1379 [7]

Answer:

Not proportional

Step-by-step explanation:

If x and y are proportional then the equation relating them is

y = kx ← k is the constant of proportionality

To determine if x and y are in proportion then k must be equal for all ordered pairs, that is

k = $\frac{y}{x}$

(2, 0) k = $\frac{0}{2}$ = 0

(4, 2) → k = $\frac{2}{4}$ = $\frac{1}{2}$

(6, 4) → k = $\frac{4}{6}$ = $\frac{2}{3}$

(8, 6) → k = $\frac{6}{8}$ = $\frac{3}{4}$

Since k is not constant for all values then not in proportion

6 0

3 years ago