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grandymaker [24]
3 years ago
9

What value of a makes the equation true? 1.7a+0.3a=4/5 btw 4/5 is a fraction

Mathematics
1 answer:
andreyandreev [35.5K]3 years ago
5 0
1.7a + 0.3a = 0.8;
(1.7 + 0.3)a = 0.8;
2 x a = 0.8;
a = 0.8 ÷2;
a = 0.4;
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Answer:

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1. f(x) = 2x + 6 Evaluate f(2)
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Step-by-step explanation:

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3 years ago
A certain city's population is 120,000 and decreases 1.4% per year for 15 years.
mart [117]

Answer:

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Step-by-step explanation:

The exponential function for growth/decay is given as:

P(t)=P_0(1 \pm r)^t, where:\\P_0$ is the Initial Population\\r is the growth/decay rate\\t is time

In this problem:

The city's initial population is 120,000 and it decreases by 1.4% per year.

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Therefore, the function is:

P(t)=120000(1 - 0.014)^t\\P(t)=120000(0.986)^t

When t=10 years

P(10)=120000(0.986)^10\\=104219.8\\\approx 104220 $ (to the nearest whole number)

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3 years ago
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