NO LINKS Write an inequality for x that would give this rectangle an AREA of at least 300ft sq2. the numbers are x+5ft 3ft

Mathematics

1 answer:

Angelina_Jolie [31]3 years ago

7 0

Answer: assuming your doing x+5 times 3 the answer for x would be 95 because 95+5 = 100 and 100 x 3 = 300

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Solve the system of equations using the linear combination method. <br> 4x−2y=7 <br> 3x+2y=0

Irina18 [472]

Answer:

x = 1

y = -3/2

Step-by-step explanation:

Step 1: Arrange the equations with like terms in column.

Step 2: You want 1 set of coefficients that are opposites. This problem already has opposites: -2y and +2y.

Step 3: Solve for x.

4x-2y=7

3x+2y=0

--------------

7x = 7

x = 1

Step 4: Substitute the value of x and solve for y.

4(1)-2y=7

4-2y=7

-2y=7-4

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4 years ago

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kolezko [41]

Answer: 3/10

Step-by-step explanation:

Take the derivative of $10x^2-6x-3$ to get $20x-6$ . Set that equal to 0 to find the critical points of the function. The critical points is when the slope is either 0 or undefined.

Now do:

$20x-6=0\\20x=6\\x=\frac{6}{20} = \frac{3}{10}$

There are quite a few more steps to actually find the minimum, but for this example you can automatically assume its a minimum because it is the only critical point of the function. Ill show you these extra steps tho.

Plug in two numbers into the derivative. One that is less than 3/10 and one that is greater than 3/10. The numbers 0 and 1 are fine. When x = 0, the function is -6. When x = 1, the function is +14. A switch from negative to positive indicates a minimum value

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Tema [17]

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