3 years ago

5.6-|-5.6+11.2| please help

Mathematics

1 answer:

Leona [35]3 years ago

5 0

Answer:

Step-by-step explanation:

step 1 : -5.6+11.2 = 5.6

step 2 : modulus of a positive number is the number itself ⇒ 5.6

step 3 : 5.6-5.6 = 0

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No need for a calculator.

Assuming that the equation is in the form $y = ab^x$ , we can plug in points to get our equation. For ease, let's use (1,18) and (2,21). When plugging these points in, we get $18 = ab^1, 21 = ab^2$ . Now let's divide the equations to get rid of $a$ : $\frac{21 = ab^2}{18 = ab^1} = \frac{21}{18} = \frac{7}{6} = b$ . Now that we have $b$ , we can plug in the value we just calculated to solve for $a$ : $18 = a(\frac{7}{6} )^1$ , and solving for $a$ , we get $a = \frac{108}{7}$ .

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This equation in decimal form (rounded to the nearest thousandth) is $f(x) = 15.429(1.167)^x$ .

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