3 years ago

(x - 5)(x + 1) 3(x + 1) For what values of x are the two expressions equal?

Mathematics

1 answer:

Vinvika [58]3 years ago

7 0

Answer:

x = -1 or x = 8

Step-by-step explanation:

Rewrite:

${x}^{2} - 4x - 5 = 3x + 3$

${x}^{2} - 7x - 8 = 0$

$(x - 8)(x + 1) = 0$

$x - 8 = 0$

$x + 1 = 0$

Thus

$x = - 1 \: or \: x = 8$

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What are the coordinates of point A?

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Answer:

(d) (7, -5)

Step-by-step explanation:

The x-coordinate is listed first in an ordered pair. It is found on the horizontal scale. The point is on the grid line halfway between 6 and 8, so is presumed to have an x-coordinate of 7.

The y-coordinate is listed second in an ordered pair. It is found on the vertical scale. The point is on the grid line halfway between -4 and -6, so is presumed to have a y-coordinate of -5.

The coordinates of point A are (x, y) = (7, -5).

<em>Additional comment</em>

As in the case here, you will often run across graphs that don't have markings on every grid line You are expected to be able to figure out the value of a grid line based on the spacing of the marked lines.

It is a good idea to get familiar with reading coordinates of a point on a graph, as you will be doing it a lot.

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2 years ago

Find an expression in simplest form for the verbal description. The total pay for 12 hours of work at a base rate of P per hour

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