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Ksivusya [100]
3 years ago
10

If s(x) = 2 - x2 and t(x) = 3x, which value is equivalent to (st)(-7)

Mathematics
1 answer:
antoniya [11.8K]3 years ago
6 0

Answer:

1029

Step-by-step explanation:

s(-7)=2-49=-47, t(-7)=-21

(st)(-7)=21*49=1029

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hope it's help you dear

Step-by-step explanation:

The decimal part of your number seems to have the repeating digit 5 in it.

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If we do this, we'll get a 15.500000 (slide the decimal in the 1.550000 right 1 places, you'll get 15.500000).

So what? Well now, we have two numbers with the same repeating decimal parts, 15.500000 and 1.550000.

Now let's just work a little algebra into all of this. Let's call your original number x. And in this case, x=1.550000. The number with the decimal point slid over can be called 10x, because 10x=15.500000

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9x = 13.95.

Now here's the important result of doing all of this: Notice how all of the repeating decimal parts have subtracted away to zero! We are left with a nice, simple 14 on the right side of the equal sign.

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The whole number part of the mixed number is found by dividing the 14 by the 9.

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