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3 years ago

PLEASE HELP

Mathematics

1 answer:

kifflom [539]3 years ago

5 0

$\\ \sf\longmapsto \dfrac{x^2-1}{x^2+5x+4}\leqslant 0$

Solving denominator

$\\ \sf\longmapsto x^2+5x+4>0$

$\\ \sf\longmapsto x^2+4x+x+4>0$

$\\ \sf\longmapsto x(x+4)+1(x+4)>0$

$\\ \sf\longmapsto (x+4)(x+1)>0$

$\\ \sf\longmapsto x>-4\:or x>-1$

Hence x $\neq$ -1
x can't be 0 as it makes function undefined

$\\ \sf\longmapsto -4$

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How to solve 5(x+1)(x+1)(x+7)

damaskus [11]

Distribute the 5 to each of the numbers so you should get 5x+5+5x+5+5x+35. after this you should combine like terms, all of the 5’s & the 35 and 5x’s. you should have 15x+45. then you divide 45 by the 15 and you should get x=3

8 0

3 years ago

Help im brain dead or im just dumb

Novosadov [1.4K]

Answer:

Step-by-step explanation:

There are four giraffes that equal 32. That means the four of them equal 32, and since they are all giraffes, they are the same amount.

32/4 = 8

Girrafe = 8

Two tigers times a giraffe equals 32. We already know that a girrafe equals 8.

32/8 = 4.

Therefore the two tigers equal 4. Since there are two tigers, and they equal 4, each tiger equals 2.

Now we know girrafes equal 8, and tigers equal 2.

A girrafe - A tiger x 3 = 2

PEMDAS says that you multiply first. So 2 x 3 equals 6. Take away 6 from 8 and you get 2.

4 0

3 years ago

Read 2 more answers

Prove: An odd number cubed is an odd number. (2n + 1)^3 = [ ? ]n^3 + [ ? ]n^2 + [ ? ]n [ ? ](4n3 + 6n2 + 3n) + [ ? ] = an odd

anastassius [24]

Step-by-step explanation:

We know that odd * odd = odd

Thus odd*odd*odd = odd*odd = odd

6 0

3 years ago

F(x) = x2 What is f(x) + f(x) + f(x)?

DaniilM [7]

Answer:

3x²

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra I

Terms/Coefficients
Functions
Function Notation

Step-by-step explanation:

Step 1: Define

[Given] f(x) = x²

[Solve] f(x) + f(x) + f(x)

Step 2: Find

Combine like terms: 3f(x)
Substitute in function: 3(x²)
Multiply: 3x²

4 0

3 years ago

What is the solution to the system of equations?

Minchanka [31]

Answer:

(1, –5)

Step-by-step explanation:

It is relatively easy to try the offered solutions to see what works.

(1, -5)

3(1) +10(-5) = -47 . . . true

5(1) -7(-5) = 40 . . . true

(1, -5) is the solution

_____

As a check, you can try some of the other choices:

(1, 5)

3(1) +10(5) ≠ -47

(-1, -5)

3(-1) +10(-5) ≠ -47

(-1, 5)

3(-1) +10(5) ≠ -47

None of the other choices works in the first equation, so they're not the solution.

4 0

3 years ago