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ddd [48]
3 years ago
10

Simplify. 5√7+√7-2√7 3√7 3√21 4√21 4√7

Mathematics
2 answers:
emmasim [6.3K]3 years ago
5 0
I hope this helps you



square root of 7. (5+1-2)


square root of 7.4


4.square root of 7
Hatshy [7]3 years ago
5 0

Answer: 4 sqrt 7

Step-by-step explanation:

He is correct, the answer is the one above.

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8. If the measure of one side of a square is increased by 2 centimeters and the measure of
GalinKa [24]

Answer:

  6 cm

Step-by-step explanation:

If the original side length is x, then the modified square has an area of ...

  A = LW

  32 = (x +2)(x -2) = x^2  -4

  36 = x^2 . . . . . . . . add 4

  6 = x . . . . . . . . . . take the square root

The original figure has a side length of 6 cm.

__

<em>Check</em>

The modified figure is 8 cm by 4 cm = 32 cm^2.

8 0
3 years ago
Evaluate the mean of each data set mentally.<br> 61, 71, 81, 91, 101
goldfiish [28.3K]

Answer:

10

Step-by-step explanation:

they each go by ten

4 0
3 years ago
Two parallel lines are cut by a transversa
Strike441 [17]
What is the question?
8 0
3 years ago
The total monthly profit for a firm is P(x)=6400x−18x^2− (1/3)x^3−40000 dollars, where x is the number of units sold. A maximum
wlad13 [49]

Answer:

Maximum profits are earned when x = 64 that is when 64 units are sold.

Maximum Profit = P(64) = 2,08,490.666667$

Step-by-step explanation:

We are given the following information:P(x) = 6400x - 18x^2 - \frac{x^3}{3} - 40000, where P(x) is the profit function.

We will use double derivative test to find maximum profit.

Differentiating P(x) with respect to x and equating to zero, we get,

\displaystyle\frac{d(P(x))}{dx} = 6400 - 36x - x^2

Equating it to zero we get,

x^2 + 36x - 6400 = 0

We use the quadratic formula to find the values of x:

x = \displaystyle\frac{-b \pm \sqrt{b^2 - 4ac} }{2a}, where a, b and c are coefficients of x^2, x^1 , x^0 respectively.

Putting these value we get x = -100, 64

Now, again differentiating

\displaystyle\frac{d^2(P(x))}{dx^2} = -36 - 2x

At x = 64,  \displaystyle\frac{d^2(P(x))}{dx^2} < 0

Hence, maxima occurs at x = 64.

Therefore, maximum profits are earned when x = 64 that is when 64 units are sold.

Maximum Profit = P(64) = 2,08,490.666667$

6 0
3 years ago
"The graph of F(x), shown below, resembles the graph of G(x) = x2, but it has been changed somewhat. Which of the following coul
SpyIntel [72]
G(x)=x²
The graph  has moved to the right 4 units, therefore the new graph will be:
H(x)=(x-4)²

It has also move 4 units up, therefore the new graph will be:
F(x)=(x-4)²+4

Answer: 
F(x)=(x-4)²+4

5 0
3 years ago
Read 2 more answers
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