Can somebody explain to me how to do number 7? ASAP!!!

Mathematics

1 answer:

Juliette [100K]3 years ago

6 0

7) Factor 3x² - 12

So, look at those 2 numbers, and see what they both have in common.

They are both divisible by 3! So, basically you divide 3x² and -12 with 3.

3(x² - 4)

It would be factorized like that because if you multiply 3 by x², you would get 3x², and if you multiplied 3 with -4, you would get -4.

~Hope I helped!~

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How do I solve this, it's not 10

guapka [62]

Answer:

26.7

Step-by-step explanation:

This is the answer because 26.7/20 = (16+26.7)/32

When two triangles are similar, it means their sides are also proportional. The reason why it is not ten is because you need to add 10 to 16 to the large triangle as well, which no longer makes it proportional.

To solve, you create a formula.

(16+x)/32=x/20

Multiply both sides by 32 to get rid of the 32 in the left side.

16+x=32x/20

Multiply both sides by 20 to get rid of the 20 right side.

320+20x=32x

-20x on both sides to get all the variables on one side and all the nukbers on the other.

320=12x

Divide both sides by 12 to get x by itself

x=26.66667

4 0

2 years ago