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3 years ago

|2x + 3| = 15 what is x?

Mathematics

2 answers:

Gre4nikov [31]3 years ago

3 0

Answer:

x = 6, -9

Step-by-step explanation:

prisoha [69]3 years ago

3 0

Answer:

x=6

Step-by-step explanation:

2x+3=15

Subtract 3 from both sides (3-3), 15-3

2x=12

Divide by 2 on both sides (2/2), 12/2=6

x=6

ISOLATE THE VARIABLE

Hope that helps

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P (6,6) y=2/3x

matrenka [14]

Answer:

$y = -\frac{3}{2}x+15$

Step-by-step explanation:

Given:

Given point P(6, 6)

The equation of the line.

$y = \frac{2}{3}x$

We need to find the equation of the line perpendicular to the given line that contains P

Solution:

The equation of the line.

$y = \frac{2}{3}x$

Now, we compare the given equation by standard form $y = mx +c$

So, slope of the line $m_{1} = \frac{2}{3}$ , and

y-intercept $c=0$

We know that the slope of the perpendicular line $m_{1}\times m_{2} = -1$

$m_{2}=-\frac{1}{m_{1}}$

$m_{2}=-\frac{1}{\frac{2}{3} }$

$m_{2}=-\frac{3}{2}$

So, the slope of the perpendicular line $m_{2}=-\frac{3}{2}$

From the above statement, line passes through the point P(6, 6).

Using slope intercept formula to know y-intercept.

$y=mx+c$

Substitute point $P(x_{1}, y_{1})=P(6, 6)$ and $m = m_{2}=-\frac{3}{2}$

$6=-\frac{3}{2}\times 6 +c$

$6=-3\times 3 +c$

$c=6+9$

$c=15$

So, the y-intercept of the perpendicular line $c=15$

Using point slope formula.

$y=mx+c$

Substitute $m = m_{2}=-\frac{3}{2}$ and $c=15$ in above equation.

$y = -\frac{3}{2}x+15$

Therefore: the equation of the perpendicular line $y = -\frac{3}{2}x+15$

8 0

3 years ago

(( NEED HELP ))

sergiy2304 [10]

Answer:

C) x/2 +2y = 4

Step-by-step explanation:

Of the equations offered, only equation C has the given point as a possible solution.

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Since the graph is not given, we don't know if the given point is on the graphed equation.

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3 years ago

1) 90%<br> round to the thousands place

Daniel [21]

Answer:

0.90

Step-by-step explanation:

hope this helps

6 0

3 years ago

Worth 60points!!!!!

EastWind [94]

Answer:

X=4

Step-by-step explanation:

2÷\frac{1}{2}=4

6 0

3 years ago

Find the length of the missing side.<br> Please help!

BigorU [14]

Answer:

Step-by-step explanation:

a2+b2=c2

4 0

3 years ago