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Vladimir [108]
2 years ago
9

If x < 0 and y ≥ 0, then xy < 0.

Mathematics
1 answer:
Vesna [10]2 years ago
5 0
What is the question. 
If y = 0 and x<0, xy not < 0, it is = 0
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Don works in home construction. He determined that the function t(A)=144A/9.252 gives the total number of 9 in. tiles needed to
Oksanka [162]

Answer:

6,226 tiles of 9 in are needed to cover an area of 400 square feet

Step-by-step explanation:

Let

A -----> an area in square feet

t(A) ---> the total number of 9 in. tiles needed

we have

t(A)=\frac{144A}{9.252}

For A=400 ft^2

substitute in the equation and solve for t

t(400)=\frac{144(400)}{9.252}

t(400)=6,226\ tiles

That means -----> 6,226 tiles of 9 in are needed to cover an area of 400 square feet

6 0
2 years ago
The 175th anniversary of the completion of the Erie Canal was in the year 2000. If it took 8 years to dig the canal, in what yea
docker41 [41]

Answer:

1817

Step-by-step explanation:

2000 - 175 = 1825 and 8 years of digging 1817

8 0
3 years ago
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Solve the system of equations.<br> -10x+3y=5 <br> x=y-4
blsea [12.9K]

Answer:

x=y-4                                          -10x+3y=5

y=x+4                                     y=10/3x+5/3

        x+4  =10/3x+5/3              

x=1

y=1+4                                      y=10/3(1)+5/3

y=5                                                    y=5

so

x=1

y=5

(1,5)

5 0
3 years ago
I need help with number 17
Minchanka [31]
The answer is D complete the square
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3 years ago
What is the answer to 7x + 2 + 2x
kotykmax [81]

Answer:

Your answer is 9x+2

Step-by-step explanation:

All you have to do is add like terms, for example, all of them that have X you can add them up,

6 0
3 years ago
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