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3 years ago

Solve, using linear combination.

Mathematics

1 answer:

Zinaida [17]3 years ago

4 0

3x + y = 2x + y
3x - 2x = y - y
x = 0
so the answer is (x,y) (0,4)

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At noon, a tank contained 10 cm of water. after several hours, it contained 7 cm of water. what is the percent decrease of water

andrey2020 [161]

Amount of decreased water = 3/10

Then, it would be 3/10 * 100 = 30%

So, your answer is 30%

7 0

3 years ago

HELP PLSSS ASAP!!!!!!!!

neonofarm [45]

Answer:

x = 5.5

Step-by-step explanation:

PM = MR

4x - 12 = -2x + 21 {add 2x to both the sides}

4x - 12 + 2x = -2x + 2x + 21

6x - 12 = 21 {Add 12 to both sides}

6x - 12 + 12 = 21 + 12

6x = 33

x = 33/6

x = 5.5

6 0

3 years ago

Read 2 more answers

Claudia is reading a book that has 360 pages.She read some of the book last week.She plans to read 46 pages today.When she does,

Ne4ueva [31]

Answer:

242 pages.

Step-by-step explanation:

Let x represent number of pages that Claudia read last week.

We have been given that Claudia is reading a book that has 360 pages. She read some of the book last week. She plans to read 46 pages today. When she does,she will be 4/5 of the way through the book.

The number of total page left after reading 46 pages and x pages last week will be equal to 4/5 of 360.

We can represent this information in an equation as:

$x+46=\frac{4}{5}\cdot 360$

Let us solve for x.

$x+46=4\cdot 72$

$x+46=288$

$x+46-46=288-46$

$x=242$

Therefore, Claudia read 242 pages last week.

3 0

3 years ago

The following set of coordinates represents which figure? (1,1), (5,3), (7,7), (3,5)

marishachu [46]

Answer:

1×1÷11. 5×3=15. 7×7=49 3×5=15 I'm not really sure but is there's anything else

3 0

3 years ago

Factor completely 12t ^8-75t^4

meriva

$12t^8-75t^4=3t^4\cdot4t^4-3t^4\cdot25=3t^4(4t^4-25)\\\\=3t^4[(2t^2)^2-5^2]\\\\use\ a^2-b^2=(a-b)(a+b)\\\\=3t^4(2t^2-5)(2t^2+5)=3t^4[(t\sqrt2)^2-(\sqrt5)^2](2t^2+5)\\\\=3t^4(t\sqrt2-\sqrt5)(t\sqrt2+\sqrt5)(2t^2+5)$

5 0

3 years ago