4 years ago

Which equation could you use to solve for x in the proportion 4/5=9/x ?

1 answer:

7 0

$\frac{9}{x} = \frac{4}{5}$
dividing both sides by 9
$\frac{1}{x} = \frac{4}{5 \times 9}$
rasing both sides to the power of -1
$x = \frac{5 \times 9}{4} = \frac{45}{4}$

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The population of a particular town is given by the function P(t) = 920(1.06)2t, where t is the time in years and P(t) is the po

Sophie [7]

For P(t) = 920*1.06^(2t), the current population is 920, the percentage growth rate is 6% semiannually, and the population in 4 years will be 920*1.06^8 = 1466.

Selection B is appropriate.

_____
The 2 in the exponent means the growth factor 1.06 is applied twice for each increment of t, that is, twice in 1 year (semiannually).

6 0

3 years ago

Solve x=7-2t for t.

yuradex [85]

x=7-2t

Move 7 to the other side. Sign changes from +7 to -7.

x-7=7-7-2t

x-7=-2t

Divide by -2 for both sides

x/-2-7/-2=-2t/-2

x/2+7/2=t

Answer: t= x/2+7/2 or t=7/2+x/2