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Anuta_ua [19.1K]
3 years ago
13

A/-8+15greater than 23

Mathematics
1 answer:
Ilia_Sergeevich [38]3 years ago
8 0

Answer: a

Step-by-step explanation:

\frac{a}{-8}+15>23

Subtract 15 from both sides.

\frac{a}{-8}+15-15>23-15\\\frac{a}{-8} >8

Multiply by -8 to isolate a.

NOTE: When you multiply or divide by negative numbers, the inequality sign flips.

-8*\frac{a}{-8}>8*-8

a

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Step-by-step explanation:

the slope intercept form is

y = ax + b

"a" being the slope, "b" being the y- intercept (which is the y-value when x = 0).

the slope here :

in the table x is always increasing by 2.

and y is always investing by 1.

so, the slope is 1/2

the y-intercept :

we need to find the y-value for x = 0.

but we don't have a data point with x = 0 in the table.

so, we have to extend the structure of the table to the left.

x decreases by 2 (making it 0), and y decreases by 1 (making it -1).

therefore, the y- intercept (b) is -1.

and the line equation is

y = (1/2)x - 1

not sure about "the other method".

there is the point-slope form of the equation :

y - y1 = a(x - x1)

again with "a" begin the slope, and (x1, y1) being a point on the line.

if we get the y-intercept in the table, then this point is (0, y1).

and the equation would be

y - y1 = ax

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y + 1 = (1/2)x

and another method ?

sometimes people write

nx + my = c

in our case starting with the original equation

y = (1/2)x - 1

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