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Akimi4 [234]
3 years ago
5

Evaluate x² + 2x - 4 if x = -4.

Mathematics
2 answers:
PilotLPTM [1.2K]3 years ago
8 0

Answer: 4

x2+2x+4/4ix

Step-by-step explanation: −4fix+x2+2x+−x2=−4+−x2

−4fix+2x=−x2−4

Step 2: Add -2x to both sides.

−4fix+2x+−2x=−x2−4+−2x

−4fix=−x2−2x−4

Step 3: Divide both sides by -4ix.

−4fix/-4xi= −x2−2x−4/4xi

Ivanshal [37]3 years ago
4 0

Answer:

the answer is ;4

Step-by-step explanation:

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Which is a function?
jeka94
I think it is A

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-1 x 4= -4 etc.
3 0
2 years ago
An electrician charges $53 per hour and his apprentice charges $22 per hour. On a job wiring a house the electrician worked four
forsale [732]

Answer:

<h2>$503.5</h2>

Step-by-step explanation:

let the apprentice duration of work be x hours

so that the electrician worked (x+4)hours

53*(x+4)+22*x=624.50

opening the bracket we have

53x+212+22x=624.50

collect like terms we have

53x+22x+212=624.50

75x+212=624.50

75x=624.50-212

75x=412.5

divide both sides by 75 we have

x=412.5/75

x=5.5

The electrician worked a total of (x+4)

5.5+4=9.5 hours or 9hours 30min

given that the electrician earns $53 per hour

then,for the work he would make 53*9.5=$503.5

7 0
3 years ago
Need help anyone can help
Ket [755]

Answer:

b

Step-by-step explanation:

because

7 0
3 years ago
Which of the expressions below is equal to 10x+30? Select all that apply.
posledela
10 (x + 3) is the answer i believe
6 0
3 years ago
Find the slope.<br> Find the slope
creativ13 [48]

Answer:

m=-2

Step-by-step explanation:

The two given points are: (-3, -2) and (-2, -4)

The equation for slope is m=\frac{y_2-y_1}{x_2-x_1}

m=\frac{(-4)-(-2)}{(-2)-(-3)}

m=-2/1

m=-2

6 0
3 years ago
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