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3 years ago

Solve: 3x+y=6 4x-2y=18 show all work pls!!!

Mathematics

1 answer:

olasank [31]3 years ago

3 0

Answer:

x = 3 and y = -3

Step-by-step explanation:

To start, let's double the first equation to get 6x + 2y = 12. Add this to the second equation to get 10x = 30, so x = 3 and y = -3.

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X/2480=20/100<br> what is x?

Vesnalui [34]

X = 12400

20/100 = 1/5

2480 x 5 = 12400

4 0

2 years ago

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I built a storage shed in the shape of a rectangular box on a square base. The material that I used for the base cost $4 per squ

kumpel [21]

Answer:

side of 6.124 ft and height of 3.674 ft

Step-by-step explanation:

Let's s be the side of the square base and h be the height of the rectangular box.

The base and the roof would have an area of $s^2$ and cost of

$4s^2 + 2s^2 = 6s^2$

The sides would have an area of 4sh and cost of 4sh*2.5 = 10sh

So the total cost for the material is

$6s^2 + 10sh = 450$

$10sh = 450 - 6s^2$

$h = 45/s - 0.6s$

The volume of the shed has the following formula

$V = s^2h = s^2(45/s - 0.6s) = 45s - 0.6s^3$

To find the maximum value for V, we can take its first derivative, and set it to 0

$\frac{dV}{ds} = 45 - 1.2s^2 = 0$

$1.2s^2 = 45$

$s^2 = 45 / 1.2 = 37.5$

$s = \sqrt{37.5} = 6.124 ft$

h = 45/s - 0.6s = 3.674 ft

4 0

3 years ago

Darren teaches a class of 25 students. He assigns homework 3 times a week, and each assignment consists of 12 problems. How many

riadik2000 [5.3K]

I'm guessing its 900 because 3 × 12 = 36
36 × 25 = 900

6 0

3 years ago

Read 2 more answers

Please show your work

rjkz [21]

Answer:

Step-by-step explanation:

If JK bisects the angle, the two angles are equal

6x+2 = 8x-6

Subtract 6x from each side

6x-6x+2 = 8x-6x-6

2 = 2x-6

Add 6 to each side

2+6 =2x-6+6

8 =2x

Divide by 2

8/2 =2x/2

4 =x

Now find angle LJM, which is the sum of the two angles

6x+2 + 8x-6

14x -4

14*4-4

56-4

5 0

3 years ago

Read 2 more answers

Please answer ASAP!

andreev551 [17]

Ignore this post, I have no Idea what it is, report this so it gets taken down so someone else can answer...

6 0

2 years ago