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ELEN [110]
3 years ago
7

Solve for x: 2x squared-1=-9

Mathematics
1 answer:
Troyanec [42]3 years ago
3 0

Answer:

x=-2

Step-by-step explanation:

-9+1=-8 so 2x squared =-8

x=-2

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What value of a makes x/2 + 4= 8 true?
Evgesh-ka [11]

Answer:

x = 8

Step-by-step explanation:

x/2 + 4 = 8

x/2 = 8 - 4

x/2 = 4

x = 4*2

x = 8

Probe:

8/2 + 4 = 8

4 + 4 = 8

6 0
4 years ago
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Solve for x and y:<br> x = 5 – 2y<br> 4y = 15 - 2x
Vika [28.1K]

Answer:

No solution.

Step-by-step explanation:

So we have the system of equations:

x=5-2y\\4y=15-2x

We can solve this by substitution. Substitute the first equation into the second. Thus:

4y=15-2(5-2y)

Distribute the right:

4y=15-10+4y

Subtract 4y from both sides:

0=15-10

Subtract the right:

0=5

As you can see, this statement is not true. In other words, the system of equations have no solution (likely because the lines are parallel).

And we're done!

7 0
3 years ago
PLEASE HELP !!!! A box of 6 golf balls costs $7.32. At that rate how much will a box of 15 golf balls costs?
vazorg [7]
7.32/6=1.22
1.22*15=18.3
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4 0
4 years ago
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Please help me thanks
KiRa [710]

Answer:

1,2,4,5,10

1,2,3,5,6

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Step-by-step explanation:

7 0
3 years ago
Which of the following expressions are equivalent to this expression
Anna007 [38]

Answer:

so It A -1{4 + (-4)}

Step-by-step explanation:

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