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padilas [110]
3 years ago
11

Mir evaluated 5x - (x + 3)2 for x = 2, as shown. Describe Amir's mistake and find the correct answer. 5(2) - (2 + 3)2 = 10 + (-5

)2 = 10 + 25 = 35
Mathematics
2 answers:
sleet_krkn [62]3 years ago
4 0

Answer:correct answer =0

Step-by-step explanation:

Step 1

5x - (x + 3)2

Putting the coefficient of x =2 in the equaton we have

5(2) - (2 + 3)2

Solving out

5(2) - (5)2

= 10- 10

=0

Step 2

Amir's mistake was in the multiplication  and wrong use of the negative sign of the bolded below

5(2) - (2 + 3)2 = 10 + (-5)2 = 10 + 25 = 35

-(5)2 cannot give 25 instead 10, so him getting a 25 and wrong use of the negative and positive made his answer wrong.

The right answer as calculated in step 1 = 0

svetoff [14.1K]3 years ago
4 0

Answer:

Amir didn't follow the order of operations and is wrong. Amir should have squared 5 and then subtracted rather than distributing the negative and squaring it. The correct answer is -15

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Fran cycles at a speed of 5.3 m/s for 5 minutes.<br><br> How far does she travel?
chubhunter [2.5K]

Step-by-step explanation:

In 1 second Fran cycles 5.3 m.

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6 0
3 years ago
What is the prime factorization of 81m^2 x^3? A) 9^2 • m^2 • x^3 B) 3^3 • m^2 • x^3 C) 3^3 • m • x D) 3^4 • m^2 • x^3
Diano4ka-milaya [45]

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3 years ago
Ben and Ella are filling goodie bags for a party. Each goodie bag needs an eraser, a bubble wand, and a few candy bar bites. Ben
maxonik [38]

Answer:

Ben

Step-by-step explanation:

25 goodies = 20 minutes

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Let's use ratio, divide both of them by their minute

25/20 = 20/20

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ella drew a rectangle that was 3 units wide and 4 units long. Draw a different rectangle that has the same perimeter but a diffe
RUDIKE [14]
First we can find the perimeter of the given rectangle

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14=2L+2*2
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So the dimensions are 5 units and 2 units

Hope this helps!
5 0
3 years ago
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