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makvit [3.9K]
3 years ago
7

Show that 9 x 2.8 is 25.2

Mathematics
2 answers:
Marizza181 [45]3 years ago
8 0
<span>9 x 2.8 is 25.2 cause u multiply 9 x 2.8 is = to 25.2</span>
Sergio039 [100]3 years ago
8 0
You shows it by dividing 25.2÷9 because 9×2=18, 25-18=7, then bring down the 2 and it turns 72, So 72÷9=8. So 2.8×9=25.2
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Step-by-step explanation:


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2. Half of the coefficient of x would be 2 since x has a coefficient of 4, and half pf 4 is 2. Squared, it is 4. That will be added inside the bracket. Subtracted on the outside is the same equation but multiplied by a, which we found out was -1 in the beginning. So, the function becomes -1(x^2+4x+4)+6-(-4).

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f(x)=-1(x+2)^2+10


Hope that made sense and make sure to check just in case I did the math wrong :]

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Andre45 [30]
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Step-by-step explanation:

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