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Montano1993 [528]
4 years ago
5

Help with functions right quick? :) please

Mathematics
1 answer:
-Dominant- [34]4 years ago
6 0
The answer is:  [B]:  -4  .
_____________________________
Here is the problem:
_____________________
 "Find f(3)."
_______________________
    f(x) = \left \{ {x + 5 ;   if  x \ \textless \ -2 ;  \atop {-4; if x  \geq -2 ;}} \right. ;
______________________________________
Since we are asked to find:  " f(3)" ;  we consider the number, "3", which is GREATER THAN OR EQUAL TO "-2" ; (that is,  " 3 \geq -2" ;
 and f(x) = -4  if x \geq  -2 . 
_____________________________________________________
So, in this case, f(x) = f(3) =  -4 ; which is: "Answer choice: [B] ".
_____________________________________________________

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Because Domian is left to right of a function, so left to right would be 0 to 4

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w=2/3 • 1/4

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3 years ago
The equation of line t is y = -2x + 9. Perpendicular to line t is line u, which passes through
Archy [21]

Answer:

Equation of line u in slope-intercept form is: \mathbf{y=\frac{1}{2}x+9 }

Step-by-step explanation:

Equation of line t : y = -2x + 9.

We need to find equation of line u, which is perpendicular to line t and passes through point (-10,4)

The equation must be in slope-intercept form.

The general equation of slope-intercept form is: y=mx+b where m is slope and b is y-intercept

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Finding y-intercept:

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y=mx+b\\4=\frac{1}{2}(-10)+b\\4=-5+b\\b=4+5\\b=9

Equation of line u:

So, equation of line u, having slope m= \frac{1}{2} and y-intercept b=9, we get:

y=mx+b\\y=\frac{1}{2}x+9

So, Equation of line u in slope-intercept form is: \mathbf{y=\frac{1}{2}x+9 }

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