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3 years ago

I need help with number 14

Mathematics

2 answers:

strojnjashka [21]3 years ago

7 0

The ionic compound produced would be Aluminum Oxide or Al2O3.

- The answer is C

Crank3 years ago

6 0

Al3+ & O2-
Using the cross method this is easy to change into the ionic compound.
The number in front of the charge of the opposite ion will be the subscrpit.
so is would be Al2O3 (with those numbers being subscrpit)

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WINSTONCH [101]

Answer:

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Step-by-step explanation:

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3 years ago

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drek231 [11]

The length is 15 inches and width is 9 inches

Step-by-step explanation:

Let

l be the length

and

w be the width

w = l-6

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The formula for area is:

$Area=l*w\\135=l*(l-6)\\135=l^2-6l\\l^2-6l-135=0\\l^2+9l-15l-135=0\\l(l+9)-15(l+9)=0\\(l+9)(l-15)=0\\l+9 = 0 => l=-9\\l-15 = 0 => l=15\\$

As the length cannot be negative, so we will use the value of length 15

If length 15,

w=l-6

w=15-6

w=9

So,

The length is 15 inches and width is 9 inches

Keywords: Area of rectangle, Quadratic equation

Learn more about quadratic equation at:

#LearnwithBrainly

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3 years ago

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VikaD [51]

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