2x- 3y=9

5x+3y=12

How would i solve this? I dont understand this and i really need help with it!Also I have to graph the anwsers afterward on a graph, so i really need the help. I appreciate it:)

Answers

Answer 1

Answer: $\begin{cases} 2x- 3y=9 \n5x+3y=12 \end{cases}\n + \ \ ------- \n 7x=21 \ \ /: 7\n \nx=(21)/(3)\n \n x=3 \n \n2x- 3y=9$

$2*3-3y=9\n \n6-3y =9\n \n-3y=9-6\n \n-3y=3 \ \ / :(-3)\n \nx=-1\n \n \begin{cases} x=3\ny= -1 \end{cases}$

$graph\n \n\begin{cases} 2x- 3y=9 \n5x+3y=12 \end{cases}\n \n \begin{cases} - 3y=-2x+9\ \ /:(-3) \n 3y=-5x+12 \ \ /:3 \end{cases}\n \n \begin{cases} y= (2)/(3)x-3 \n y=-(5)/(3)x+4 \end{cases}$

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Rewrite using the distributive property and GCF 16 + 40

Answers

The GCF of 16 and 40 is 8.

16/8 = 2

40/8 = 5

We can rewrite this using the distribute property like so:

8(2 + 5)

Using the distributive property:

16 + 40

16 + 40 = 56

We can also add inside the parentheses and multiply and we'll get the same answer.

8(7)

The airplane has a wingspan of a feet and a tailspan of b feet. If the tailspan in the drawing is 2 inches, and a/b = 3, what is the actual wingspan of the airplane?Scale: 1 inch = 5 feet

Answers

x/2 = 3 (x= 3*2 = 6in)

6in = 30ft

Hope I become the brainliest answer

Answer:

30 feet is correct.

Step-by-step explanation:

Since a = 3b, the wingspan is 6 inches in the drawing, so it is 6x5 = 30 feet on the plane.

PLEASE HELP
Applications of Spheres

Answers

1.) B and C
2.) 65416.67
3.) 18.0
4.) 208.4
5.) 3836

Please help thanks!!

Answers

The answer is 1.) 6^1/6

The third root of something is the same as an exponent to the 1/3 power.

(When an exponent is a fraction, the numerator is powers and the denominator finds the root. For example: 3 to the power of 4/2 is multiplied by itself 4 times (81) then the denominator, 2, means we find the square root of it (9). 4/2=2, and 3 to the 2nd power is also 9.)

So that would be 6 to the 1/3 power, then you find the square root of that, so it's (6 to the 1/3 power) to the 1/2 power, and according to the Power Rule (a power on top of a power means you multiply the two powers), that would end up being 1/6.

$\sqrt{ \sqrt[3]{6} } = \sqrt{ {6}^{ (1)/(3) } } = (6 { (1)/(3) })^{ (1)/(2) } = {6}^{ (1)/(3) * (1)/(2) } = {6}^{ (1)/(6) }$

The answer is number 1

Corey needs 24 boards that are 47 1/2 inches long.A. how many feet of boards should he buy? explain.
B. If you can only buy 8-foot boards, how many should he buy?explain

Answers

Answer with explanation:

Number of boards need by corey =24

Length of each board is $47 (1)/(2)\n\n=(95)/(2)$

Length in inches of board that corey should buy

$(95)/(2)* 24\n\n=95*12\n\n=1140$ inches

1 foot=12 inches

$(1)/(12) \text{foot}=1\text{inches}\n\n(1140)/(12) \text{foot}=1140\text{inches}\n\n95\text{foot}=1140\text{inches}$

So, Length in feet of board =95 foot

Length of each board = 8 foot

Total Length in feet of board =95 foot

So, number of boards that corey should buy

$(95)/(8)\n\n=11(7)/(8)$

=Approximately 12 Boards

A. 95 feet
B. 12, because that would get you 96 feet of board, and if you only got 11, then you would only have 88 feet of boards which is not enough.

Sally's soccer team won 68% of the games they played. if they won 17 games, how many did they play?