Can anyone help me with this:

5x -3 < -3

Answers

Answer 1

Answer: $5x-3 < -3\ \ \ \ /+3\n5x-3+3 < -3+3\n5x < 0\ \ \ \ /:5\nx < 0\n\nx\in\mathbb{R^+}\Rightarrow x\in(0;\ \infty)$

Answer 2

Answer: $5x -3 < -3 \n 5x<0\n x<0$

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Sqrt(2−7x) -sqrt(x 3) =3

Answers

$(a+b)^2=a^2+2ab+b^2 \n \n √(2-7x) - √(x+3) =3 \n (√(2-7x))^2 =(3 + √(x+3))^2\n2-7x=9+6√(x+3)+x+3 \n 2-7x-9-x-3=6√(x+3) \n (-8x-10)^2=(6√(x+3))^2 \n64x^2+160x+100=36(x+3) \n 64x^2+160x+100=36x+108\n 64x^2+160x-36x+100-108=0 \n 64x^2+`124x-8=0 \n 4( 16x^(2) +31x-2)=0 \n$
$16x^(2) +31x-2=0 \n(x-2)(16x-1)=0 \n x+2=0 \n x=-2 \n 16x-1=0 \n x= (1)/(16)$

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Which r-value represents the strongest correlation?–0.83
–0.67
0.48
0.79

Answers

The r-value that represents the strongest correlation is (a) - 0.83

How to determine the strongest correlation?

The correlation coefficient has its value to be from -1 to 1

The closer the value to 1 or -1, the stronger the correlation

-0.83 is closer to -1 than the other values closer to 1 or -1

Hence, the r-value that represents the strongest correlation is (a) - 0.83

Answers

Answer:

−42x−40

Step-by-step explanation:

Classify -2x^4-x^3+8x^2=12 by degree

Answers

To find the degree of a polynomial, we must find the LARGET power in the equation: and that is 4.

Y = 7 (15 + x)solve for x
How many minutes did you spend on a new song (x) if you practiced 210 minutes last week? 245 minutes? 315 minutes?

Answers

y equals the # of hours u practiced so u substitute y for the # of hours and then solve for x. if im right u multiply x times 7 and u get how many minutes per week u practice the new song. and just the x represents what u practice in a day 210=7(15+x) 210/7=15+x 30-15=x 15 min =x 245=7(15+x) 245/7=15+x 35-15=x 20=x 315=7(15+x) 315/7=15+x 45-15=x 30 min=x

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