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tigry1 [53]
3 years ago
9

Rozwiąż równania:

Mathematics
1 answer:
geniusboy [140]3 years ago
3 0

a)\\x-7=(7-x)-(14-2x)\\x-7=7x-14+2x\\x-7=-7+x\\b)\\x-4x+(2x+3)=6(3-x)\\x-4x+2x+3=18-6x\\-x+3=18-6x\\-x+6x=18-3\\5x=15 //:5\\x=3\\c)\\2x+15=16(1+0,125x)\\2x+15=16+2x\\15=16

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Given the graph of a line y=−x. Write an equation of a line which is parallel and goes through the point (8,2).
serious [3.7K]

The slope of y = -x is m = -1.  Thus, starting with the slope-intercept form y = mx + b, we substitute -1 for m, 8 for x and 2 for y, to determine the vaue of b:

2 = -1(8) + b, or 10 = b.  Then the equation of the line parallel to y = -x and passing thru (8,2) is:

y = -x + 10.

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4 years ago
What is the inverse of the following condition? If n is the sum of two even numbers, then n is even.
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4 years ago
How do you find your y-intercept from your x-y points?
PSYCHO15rus [73]
1. To determine the x-intercept, we set y equal to zero and solve for x. Similarly, to determine the y-intercept, we set x equal to zero and solve for y. ...

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5 0
2 years ago
Find the estimates of x^2-x-2=3
Julli [10]

Answer:

x=\frac{1+\sqrt{21}}{2}\approx 2.79\\or\ x=\frac{1-\sqrt{21}}{2}\approx -1.79

Step-by-step explanation:

Given

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x^2-x-2=3\\x^2-x-5=0

Roots of the quadratic equation ax^2+bx+c=0 are

x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\

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x=\frac{1\pm\sqrt{(-1)^2-4(1)(-5)}}{2\cdot 1}\\x=\frac{1\pm\sqrt{21}}{2}\\so, x=\frac{1+\sqrt{21}}{2}\approx 2.79\\or\ x=\frac{1-\sqrt{21}}{2}\approx -1.79

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3 years ago
the mean length of 7 books is 258 pages . the longest book has 294 pages. what is the mean length of the other 6 books
den301095 [7]
I think you divide.. find the mean of all of the numbers?
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4 years ago
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