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3 years ago

Evaluate the expression 5(7-4)2/ 3+11

Mathematics

1 answer:

Paha777 [63]3 years ago

3 0

37 your welcome you have to add 3 and ll but u have to work perenthesis first it's like pemdas and u have your answer

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Subtract rational expression. <br> Show work please.

yan [13]

Given:

$$\frac{x+4}{x-1}-\frac{5}{x^{2}-1}$

To find:

The simplified rational expression by subtraction.

Solution:

Let us factor $x^2-1$ . It can be written as $x^2-1^2$ .

$x^2-1^2=(x-1)(x+1)$ using algebraic identity.

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

LCM of $x-1,(x+1)(x-1)=(x+1)(x-1)$

Make the denominators same using LCM.

Multiply and divide the first term by (x + 1) to make the denominator same.

$$=\frac{(x+4)(x+1)}{(x-1)(x+1)}-\frac{5}{(x-1)(x+1)}$

Now, denominators are same, you can subtract the fractions.

$$=\frac{(x+4)(x+1)-5}{(x-1)(x+1)}$

Expand $(x+4)(x+1)-5$ .

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

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

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

6 0

3 years ago

Find the unit rate

kaheart [24]

Answer:

a) 60 mph

b) 32 miles per gallon

c) $2.40

d) $0.80

e) 54 wpm

7 0

3 years ago

if each of 360 person's drink to bottled drinks daily how many cases of 24 bottles do they use each day

satela [25.4K]

They would use 15 bottles a day.
Hope this helps!

3 0

3 years ago

3n + 8 = 53<br> I don’t understand how to find the n

olganol [36]

Answer:

n=15

Step-by-step explanation:

subtract 8 from both sides to get 3n=45

divide both sides by 3 to solve for n to get n=15

3 0

3 years ago

Read 2 more answers

What is a rate in math.

Ierofanga [76]

Answer:

a ratio between two different units

for example 60miles per 5 hours

Step-by-step explanation:

let me know if you need unit rate yoo :)

7 0

3 years ago