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irinina [24]
3 years ago
9

3 lbs of apples cost $9. How many lbs of apples can you get with $12?

Mathematics
1 answer:
qaws [65]3 years ago
5 0
The exact answer is
3.9999999996
but if you round it up it will equal
4
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An air traffic controller is tracking two planes. To start, Plane A is at an altitude of 4385 feet and Plane B is at an altitude
Fantom [35]

Answer:

60 seconds, 7715 feet

Step-by-step explanation:

Plane A and B start out 615 feet apart, and we find this by subtracting the height of plane A from plane B, getting 5000-4385=615. Now we have to find how many more feet of altitude plane A is gaining per second over plane B.

To find this we subtract 45.25 from 55.5 and get 10.25 feet per second. Now to find out how many seconds until they'll be at the same altitude we simply divide 615 by 10.25, getting 60 seconds.

For the second part, to find the altitude at this point, we simply multiply the altitude gain of one of the planes per second by the time of 60 seconds to get how much altitude they gained over that time, and add it to the starting altitude. Doing this with plane B we get 45.25*60=2715, and we add that to 5000 to get the final answer of 7715.

4 0
3 years ago
Perform the following operations and prove closure. Show your work.<br><br> (x/x+3) + (x+2/x+5)
Westkost [7]

Answer:

\frac{2(x^{2} + 5x + 3)}{(x+3)(x+5)}

Step-by-step explanation:

We need to sum the following two expressions:

\frac{x}{x+3} + \frac{x+2}{x+5}

\frac{x(x+5) + (x+2)(x+3)}{(x+3)(x+5)}

expanding the polynomial in the numerator:

\frac{2x^{2} + 10x + 6}{(x+3)(x+5)}

\frac{2(x^{2} + 5x + 3)}{(x+3)(x+5)}

This is the most simplified form we can get:

\frac{2(x^{2} + 5x + 3)}{(x+3)(x+5)}

8 0
3 years ago
Read 2 more answers
Simplify the expression. 7x^2+3-5(x^2-4) edguneity
Law Incorporation [45]

Answer:

2x^2+23.

Step-by-step explanation:

Combine like terms.

This expression simplified is 2x^2+23.

4 0
2 years ago
Lauren is sewing a quilt using fabric squares.
KengaRu [80]

Answer:

x^2 + 8x + 16

Step-by-step explanation:

Given length of square x + 4.

Area of square with side S is given by S^2.

Therefore are of square with side x + 4 is given by (x + 4)^2

Area of square = (x + 4)^2\\=>(x + 4)*(x + 4)\\=> x(x + 4) + 4(x + 4)\\=> x^2 + 4x + 4x + 4*4\\=>  x^2 + 8x + 16

Thus, x2 + 8x + 16 expression represents the area of a fabric square.

4 0
3 years ago
Louise completed the work shown below.
Otrada [13]
Wrong.
(a+b)^2\not=a^2+b^2\\\\&#10;(a+b)^2=a^2+2ab+b^2
6 0
3 years ago
Read 2 more answers
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