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3 years ago

6

If x=4x+5 what is the value of f(-3)

2 answers:

kolbaska11 [484]3 years ago

6 0

Step-by-step explanation:

$f(x) = 4x + 5 \\ f( - 3) = 4 \times( - 3 )+ 5 \\ f( - 3) = - 12 + 5 \\ f( - 3) = - 7$

irina1246 [14]3 years ago

5 0

You plug in -3 for x for 4(-3)+5 =-7

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2 years ago

What are two solutions of 3 + 4 |x/2 + 3| = 11?

Alex

3 + 4abs(x/2 + 3) = 11 Subtract 3
4 abs(x/2 + 3) = 11 - 3
4 abs(x/2 + 3) = 8 Divide by 4
abs(x/2 + 3) = 8/4
abs(x/2 + 3) = 2

Solution 1
x/2 + 3 = 2 Subtract 3
x/2 = 2 - 3
x/2 = - 1 Multiply by 2
x/2 *2 = - 2
x = - 2

Solution 2
x/2 + 3 = - 2
x/2 = - 2 - 3
x/2 = - 5 Multiply by 2
x = -5 * 2
x = -10

Solutions
x = - 2 <<<< answer 1
x = -10 <<<< answer 2

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3 years ago