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Shkiper50 [21]
3 years ago
6

Hey, I would love it it someone could please answer this as soon as possible!

Mathematics
1 answer:
Ann [662]3 years ago
3 0

Answer:


Step-by-step explanation:

x= -1/4

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Use the identity (x+y)(x^2−xy+y^2)=x^3+y^3 to find the sum of two numbers if the product of the numbers is 28, the sum of the sq
lara31 [8.8K]

Step-by-step explanation:

We have xy = 28, x² + y² = 65 and x³ + y³ = 407.

Since (x + y)(x² - xy + y²) = x³ + y³,

x + y = (x³ + y³)/(x² + y² - xy)

= (407) / [(65) - (28)]

= 407 / 37

= 11.

Hence the sum of the numbers is 11.

4 0
3 years ago
Read 2 more answers
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
100 points Graham sold 6 magazines less than double what Adrianne sold, a. Which of the following expressions represents Graham'
-Dominant- [34]

Answer:

<u>"2a − 6". </u>

Step-by-step explanation:

The correct expression is "2a − 6".

This is a way to verify:

Let's say Adrianna sold 36 magazines. Now, substitute in that for a in the expression and calculate:

2a-6=\\ \\2(36)-6=\\ \\72-6=\\ \\66

Now, is 66 six less than the double of 36? The answer is yes, therefore, the expression is correct.

4 0
1 year ago
Read 2 more answers
Diagram is shown below.
Paul [167]

Answer:

A) ∠BEC is one-half of ∠BAC

B) ∠BEC = 60°

C) ∠BDC = 120°

Step-by-step explanation:

C) arc BDC = 120°

arc BEC = 360° - 120° = 240°

∠BDC = 1/2(240°) = 120°

7 0
3 years ago
Solve the inequality and give the interval notation
laila [671]
|7 - x| >= 1

When solving for x inside an absolute value, you can set up two equations. One for the positive and one for the negative(since we’re dealing with absolutes.

We end up with:
7 - x >= 1
7 - x <= -1 (inequalities’ signs flip when multiplying or dividing by a negative.)

7 - x >= 1
7 - 1 >= x
X <= 6

7 - x <= -1
7 + 1 <= x
X>= 8

X: (-infinity, 6]U[8, infinity)
6 0
3 years ago
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