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noname5359
05.09.2019 •
Mathematics
Find the roots of the equation below.
7^x2 + 3 = 8x
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Ответ:
x =![\frac{4}{7}](/tpl/images/0223/1971/2f732.png)
Step-by-step explanation:
7x² + 3 = 8x
7x² - 8x + 3 = 0
Applying the quadratic formula;
x = (8 ±
) ÷ 2(7)
x = (8 ± 0) ÷ 2(7) =![\frac{4}{7}](/tpl/images/0223/1971/2f732.png)
Ответ:
see explanation
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
y =
x - 6 ← is in slope- intercept form
with slope m =![\frac{2}{3}](/tpl/images/1133/3232/d1391.png)
Parallel lines have equal slopes , then
y =
x + c ← is the partial equation
To find c substitute (9, 2) into the partial equation
2 = 6 + c ⇒ c = 2 - 6 = - 4
y =
x - 4 ← equation of parallel line
-------------------------------------------------------------------
Given a line with slope m then the slope of a line perpendicular to it is
y = -
x + c ← is the partial equation
To find c substitute (9, 2) into the partial equation
2 = -
+ c ⇒ c = 2 +
= ![\frac{31}{2}](/tpl/images/1133/3232/eb02f.png)
y = -
x +
← equation of perpendicular line