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Alex17521 [72]
4 years ago
11

Evaluate 7x - (2x)2 + x 3 for x = -2.

Mathematics
1 answer:
V125BC [204]4 years ago
7 0

7x - (2x)2 +  {x}^{3}

7x - 4x +  {x}^{3}

3x +  {x}^{3}

3( - 2) +  { (- 2)}^{3}

- 6 +  - 8

- 14

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Simplify the expression.<br><br> can anyone explain to me how to do this? please
WINSTONCH [101]

Answer:

The answer is the last one (32x^7y^15)

You can bring x to the second power (x^2) because (x) is basically x^1. This is a basic exponent rule. (x^m)^n = x^m times n.

Then you can apply this rule to (2xy^3)^5. First you bring two to the fifth power and get 32. Then you bring x^5 according to the rule. Then you bring y^15, also because of the rule.

Now you have:

x^2 times 32x^5y^15

Now you just multiply the like terms together (x^2 and x^5)

When you multiply two exponents with the same base, you add the exponents together: a^n times a^m = a^n+m.

So you end up with 32x^7y^15



5 0
3 years ago
Read 2 more answers
The average cost of online photos decreased
SCORPION-xisa [38]

Answer:

The average rate of change is -0.034 which means that the decrease is -0.034 in the cost of per print per year

Step-by-step explanation:

Given that

Price of print in 2002 = p1 =$0.50

Price of print in 2013 = p2 =$0.13

y1 = 2002

y2 = 2013

The rate of change is given by the formula:

r = \frac{decrease}{run}

Here decrease is the change in price and run is the difference in years.

Mathematically, it can be written as:

r = \frac{p_2-p_1}{y_2-y_1}

Putting the values

r =\frac{0.13-0.50}{2013-2002}\\r = \frac{-0.37}{11}\\r =-0.0336\\r = -0.034

Hence,

The average rate of change is -0.034 which means that the decrease is -0.034 in the cost of per print per year

6 0
3 years ago
It took the Farhats 85 minutes to drive 102 miles. If they this same driving rate, how long will it take them (in minu get to th
STALIN [3.7K]

Answer:

255 minutes

Step-by-step explanation:

306 can be subtracted by 102 a total of 3 times. We know that for every 102 miles = 85 minutes. So 85 * 3 = 255.

8 0
3 years ago
Convert the equation you found, T = A3/2, into a form without any rational exponents.
solniwko [45]
Y = mx + bDomainAll the X values in a functionRange<span>All the Y values in a function</span>
6 0
3 years ago
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You are given the summer reading list for your English class. There are 88 books on the list. You decide you will read all 88. I
vladimir1956 [14]

Answer:

1.854826e+134

Step-by-step explanation:

To answer a question like this, you need to know that the factorial of a number is the multiplication of all the posible whole numbers from 0 to the original number. Thus, this problem can be solved calculating 88! (88 factorial) = 88 * 87 * 86 * 85 * 84 * … * 3 * 2 * 1, so the final answer is a very big number, 1.854826 * 10 ^134

8 0
4 years ago
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