4 years ago

5 have no idea please help

Mathematics

1 answer:

STALIN [3.7K]4 years ago

7 0

You would write -7+5+8
Remember keep it change it flip it

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Using only numbers in the following list,

charle [14.2K]

Answer:

wgfregrt

Step-by-step explanation:

tryryrtrtytrytry

6 0

3 years ago

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Explain please my answer I put in isnt correct plz explain

Aleks04 [339]

Mode is <span> number that occurs most often.

So your answer is correct . It's 7 (last choice)</span>

6 0

4 years ago

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Exponential Equation WITHOUT CALCULATOR

Alborosie

Multiply both sides of the first equation by $2^x$ :

$2^x-2^{-x}=4\implies 2^{2x}-1=4\cdot2^x\implies 2^{2x}-4\cdot2^x-1=0$

This is quadratic in $2^x$ ; to make this clear, substitute $y=2^x$ . Then

$y^2-4y-1=0\implies y=2\pm\sqrt5$

One of these solutions for $y$ is negative. But, if $x$ is real, then $y=2^x$ is always supposed to be positive, so we can throw out the negative root, leaving $y=2+\sqrt5$ .

We actually don't have to solve for $x$ exactly. We can just rewrite the next two equations in terms of $y$ .

$2^{2x}+2^{-2x}=(2^x)^2+(2^{-x})^2=y^2+\dfrac1{y^2}$

$2^{3x}-2^{-3x}=y^3-\dfrac1{y^3}$

Since $y=2+\sqrt5$ , we get

$(2+\sqrt5)^2+\dfrac1{(2+\sqrt5)^2}=18$

$(2+\sqrt5)^3-\dfrac1{(2+\sqrt5)^3}=76$

7 0

4 years ago

What is the additive inverse of th polynomial -9xy2+6x2y-5x3?

Norma-Jean [14]

Additive inverse of 9xy² + 6x²y - 5x³

-1(9xy² + 6x²y - 5x³) ⇒ (-1)(9xy²) + (-1)(6x²y) + (-1)(-5x³)

<span>-9xy² - 6x²y + 5x³ is the additive inverse of the given polynomial.</span>

5 0

3 years ago

What is the value of -5.872 + (-5.1) ÷ 1.5? (a.) -9.272 (b.) -2.472 (c.) -7.315 (d.) 0.515

BigorU [14]

Answer:

The answer is A) -9.272

Step-by-step explanation:

-5.872 + (-5.1)/1.5

= -5.872 - 3.4

= -9.272

5 0

3 years ago