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pshichka [43]
3 years ago
9

4x-49=0" align="absmiddle" class="latex-formula">
Mathematics
2 answers:
Alex777 [14]3 years ago
8 0
15x^2+14x-49=0\\\\
Terms:\\
a=15\ \ \ \ b=14\ \ \ \ c=-49\\
Quadratic\ Formula:\\\\
x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}\\\\
x=\dfrac{-14\pm\sqrt{196+2,940}}{30}\\\\
x=\dfrac{-14\pm\sqrt{3,136}}{30}\\\\
x=\dfrac{-14\pm56}{30}

Roots:\\\\
x'=\dfrac{-14+56}{30}\\\\
x'=\dfrac{42}{30}\\\\
x'=\dfrac{21}{15}\\\\
\boxed{x'=\dfrac{7}{5}}\\\\\\\\
x''=\dfrac{-14-56}{30}\\\\
x''=\dfrac{-70}{30}\\\\
\boxed{x''=\dfrac{-7}{3}}
Paraphin [41]3 years ago
5 0
15x² + 14 - 49 = 0
x = <u>-(14) +/- √((14)² - 4(15)(-49))</u>
                         2(15)
x = <u>-14 +/- √(196 + 2940)</u>
                     30
x = <u>-14 +/- √(3136)</u>
                 30
x = <u>-14 +/- 56</u>
             30
x = <u>-14 + 56</u>      x = <u>-14 - 56</u>
           30                     30
x = <u>42</u>               x = <u>-70</u>
      30                      30
x = 1.4              x = 2.33...
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serious [3.7K]

Answer:

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Add like terms

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2 years ago
67. The line contains the point (4,0) and is parallel<br> to the line defined by 3x = 2y.
olganol [36]

Answer:

y=\frac{3}{2} x-6

Step-by-step explanation:

Hi there!

<u>What we need to know:</u>

  • Linear equations are typically organized in slope-intercept form:
  • y=mx+b where m is the slope of the line and b is the y-intercept (the value of y when the line crosses the y-axis)
  • Parallel lines will always have the same slope but different y-intercepts.

<u>1) Determine the slope of the parallel line</u>

Organize 3x = 2y into slope-intercept form. Why? So we can easily identify the slope, m.

3x = 2y

Switch the sides

2y=3x

Divide both sides by 2 to isolate y

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

Now that this equation is in slope-intercept form, we can easily identify that \frac{3}{2} is in the place of m. Therefore, because parallel lines have the same slope, the parallel line we're solving for now will also have the slope \frac{3}{2} . Plug this into y=mx+b:

y=\frac{3}{2} x+b

<u>2) Determine the y-intercept</u>

y=\frac{3}{2} x+b

Plug in the given point, (4,0)

0=\frac{3}{2} (4)+b\\0=6+b

Subtract both sides by 6

0-6=6+b-6\\-6=b

Therefore, -6 is the y-intercept of the line. Plug this into y=\frac{3}{2} x+b as b:

y=\frac{3}{2} x-6

I hope this helps!

7 0
2 years ago
Why can't you use the product of powers rule to simplify<br> this expression? Explain.<br> 3^4.2^8
Tema [17]

Answer:

Because the base of this expression is not same.

3 0
3 years ago
Can someone help me plz
Anton [14]

Answer:

The division was completed in the wrong order

Step-by-step explanation:

To convert \frac{5}{8} to a percent

The numerator is divided by the denominator, that is

    0.625

8 | 5.0

Multiply 0.625 × 100% = 62.5%

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3 years ago
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