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JulsSmile [24]
3 years ago
13

Evaluate the expression 7x^2y, when x=4 and y=2

Mathematics
2 answers:
otez555 [7]3 years ago
8 0

Answer:

224

Step-by-step explanation:

7x^2 y

Let x =4 and y=2

7(4)^2 (2)

7*16*2

224

GalinKa [24]3 years ago
8 0

Answer:

7(4)+2(2)=32

Step-by-step explanation:

7 times 4 is 28

2 times 2 is 4

28 + 4 is 32

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Select the correct answer from each drop-down menu.
Lorico [155]

Answer:

A)Multiply both sides by 3x + 7.

Reset

A)the solution of the equation is  x=-12

Step-by-step explanation:

Hello

let

to begin isolating we must multiply both sides by 3x + 7.

Reset

this way

\frac{-22+3x}{3x+7}=2\\\frac{-22+3x}{3x+7}*(3x+7)=2*(3x+7)\\-22+3x=2*(3x+7)

let´s continue to find x

\\-22+3x=2*(3x+7)\\-22+3x=6x+14\\-22-14=6x-3x\\-36=3x\\x=\frac{-36}{3}\\ x=-12

the solution of the equation is x=-12

have a great day

7 0
4 years ago
Question part
Ne4ueva [31]

If the northern side has length x and the east and west sides have length y, then the cost of the fence is 
<span>C = 12x + 12y + 6y </span>
<span>and the enclosed area is A = xy. </span>

<span>12x + 18y = 6000 </span>
<span>x = 500 - 1.5y </span>
<span>A = 500y - 1.5y^2 </span>

<span>A is maximized when y = 500/3. In which case x = 250. </span>
5 0
3 years ago
Need help #14 <br> The center of the circle is (0,-8). The radius is 9.
Shtirlitz [24]
X^2+ (y+8)^2 = 81.....this is C.
X^2 + y^2 + 16y +64=81 so x^2 + y^2 + 16y = 17.....this is D.

So I’d say C and D are correct
3 0
3 years ago
Read 2 more answers
Rewrite the expression without using grouping symbols.
kupik [55]

Answer:

D. 13 * 19 - 13x

Step-by-step explanation:

To get your answer, you have to distribute 13 to both numbers inside the parenthesis. So it would be 13 * 19 - 13 * x. You don't need the multiplication sign between the 13 and the x to say that they need to be multiplied.

8 0
4 years ago
Read 2 more answers
Susan rolled a die 1,086 times. Which of the following would be a good estimate of the number of times she rolled the number 3 o
adell [148]

Hello!

This is a problem about probability.

What we would first do is find the theoretical probability that Susan would roll the number 3 on a die.

Assuming that this is a fair six sided die, there is only one face with the number 3, and there are 6 sides, meaning that the probability that Susan rolls a 3 would be \frac{1}{6}.

Now, Susan is rolling a die 1,086, meaning that we can divide this number by 6 to find the theoretical number of times that Susan would roll the number 3 on this die.

You should get 181 times, which would be a good estimate of how many times she could roll the number 3.

Hope this helps!

4 0
3 years ago
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