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3 years ago

Evaluate ab for a = 2 3/4 and b = 4/5.

Mathematics

2 answers:

ikadub [295]3 years ago

7 0

Answer:7 1/2

Step-by-step explanation:

Crazy boy [7]3 years ago

6 0

Rewrite a as an improper fraction:

2 3/4 = 11/4

Now you have 11/4 x 4/5

Multiply the two top numbers together and the two bottom numbers together.

11x4 / 4x5 = 44/20 now rewrite as 2 4/20 which can simplify to 2 1/5

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4. Determine whether f(x) = 1/3x + 5 and g(x) = 3x - 15 are inverse functions.

Ierofanga [76]

Answer:

YES! we conclude that f(x) = 1/3x + 5 and g(x) = 3x - 15 are inverse functions.

Step-by-step explanation:

Given

Given that the function f(x) and g(x) are inverse functions.

$f\left(x\right)\:=\:\frac{1}{3}x\:+\:5$

$g(x) = 3x - 15$

To determine

Let us determine whether f(x) = 1/3x + 5 and g(x) = 3x - 15 are inverse functions.

Determining the inverse function of f(x)

A function g is the inverse function of f if for y = f(x), x = g(y)

$y=\frac{1}{3}x+5$

Replace x with y

$x=\frac{1}{3}y+5$

Solve for y

$y=3x-15$

Therefore,

YES! we conclude that f(x) = 1/3x + 5 and g(x) = 3x - 15 are inverse functions.

4 0

3 years ago

X/3 - 4 = (-20) what is the answer

melisa1 [442]

Answer:

x=-48

Step-by-step explanation:

Add 4 to both sides and then multiply both sides by 3.

3 0

4 years ago

Read 2 more answers

X-5y=55 slope intercept form

Talja [164]

Answer:

y = x/5 -11

Step-by-step explanation:

y = mx + b (slope intercept form)

5y = x-55

y = x/5 -11

4 0

3 years ago

Yeah help lol i don’t understand math

spayn [35]

Answer:

x=4.4

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

At your job, you are paid $50 per week plus $3 per sale. At least how many sales do you need to make in order to have over $250

julsineya [31]

0+3⋅c>250

50+3⋅c−50>250−50

3⋅c>200

3⋅c3>2003

c>66.7

so 67 sales rouned

6 0

3 years ago