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Nonamiya [84]
4 years ago
8

What is (-9)+9 simplified

Mathematics
1 answer:
Paul [167]4 years ago
6 0

Answer:

the answer is zero

Step-by-step explanation:

-9+9=0

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MATH HELP ME ASAP PLEASE
elena55 [62]

Answer:

53lbs.

Step-by-step explanation:

If Kevin bought 3 20lbs. Bags of gravel he would have 60 lbs. of gravel. In the end he has 7 lbs. of gravel left he used 53 pounds.

Equations:

7+x=60 or 60-7=53 lbs.

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What’s the area of the rhombus?
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65ft² i guess

Step-by-step explanation:

using area of rombus diagonal=½*d1*d2

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3/10 + 4/100 = ???<br><br> .
Arlecino [84]

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34/100

Step-by-step explanation:

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Given the function f(x) = 3 x - 21 + 6, for what values of x is f(x) = 18?
IrinaK [193]

Answer:

X=2

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3 years ago
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SOLVE THE EQUATION BY COMPLETING THE SQUARE!!!!! HELPPPPPPPPPP!!!!!!!!!!!
Svetlanka [38]

Answer:

x=5±√5, x=5-√5.

Step-by-step explanation:

Here's why:

First, keep the terms on the left-hand side and subtract 20 from both sides to get:

Original Equation: x²-10x+20=0

x²-10x+20-20=0-20

=x²-10x=-20

Next, use the property [b⋅1/2]². Notice that b is -10 in this case:

[b⋅1/2]²

=[-10⋅1/2]²

=25

Then, add the result, 25, to both sides of the equation in Step 1.

x²-10x+25=-20+25

Notice that the left side is a perfect square, so you can factor it out:

x²-10x+25=-20+25

=(x-5)²=-20+25

Combine like terms on the right-hand side:

(x-5)²=-20+25

=(x-5)²=5

Then, take the square root of both sides:

√(x-5)²=±√5

The square cancels out, which leaves you with:

x-5=±√5

Finally, isolate x by solving for the variable.

x-5=±√5

=x=5±√5

Therefore, your final answer is:

x=5±√5

When you are solving for other questions that involve completing the square, always remember to follow these steps, and you'll be good to go.

Hope this helped! :)

-Jina Wang

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