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3 years ago

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A boy is 10 years older than his brother. In 4 years he will be twice as old as his brother. Find the present age and write an e

quation to solve for it.

1 answer:

Gekata [30.6K]3 years ago

3 0

x+10=2x-4

x+10+4= 2x-4+4

x-x+14=2x-x

14=x

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F^-1(-10) + f(-6) <br> Please help!!!!

Brums [2.3K]

Answer:

-10/f-6f

Step-by-step explanation:

simplify it the equation

4 0

3 years ago

A submarine descends 100 meters from the oceans surface.the submarine ascends 40 meters and then descends 90 meters. write an in

vivado [14]

I believe the answer is -230

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3 years ago

These tables of values represent continuous functions. In which table do the values represent an exponential function?

vichka [17]

Answer:

The correct option is B.

Step-by-step explanation:

A function is called an exponential function if it has common ratio.

A function is called an linear function if it has common difference.

In option A.

$\frac{f(2)}{f(1)}=\frac{6}{3}=2$

$\frac{f(3)}{f(2)}=\frac{9}{6}=\frac{3}{2}$

$2\neq \frac{3}{2}$

Since the given table has different ratio, therefore it is not an exponential function. Option A is incorrect.

In option B.

$\frac{f(2)}{f(1)}=\frac{6}{2}=3$

$\frac{f(3)}{f(2)}=\frac{18}{6}=3$

$3=3$

Since the given table has common ratio, therefore it is an exponential function. Option B is correct.

In option C.

$\frac{f(2)}{f(1)}=\frac{22}{10}=\frac{11}{5}$

$\frac{f(3)}{f(2)}=\frac{34}{22}=\frac{17}{11}$

$\frac{11}{5}\neq \frac{17}{11}$

Since the given table has different ratio, therefore it is not an exponential function. Option C is incorrect.

In option D.

$\frac{f(2)}{f(1)}=\frac{8}{7}$

$\frac{f(3)}{f(2)}=\frac{9}{8}$

$\frac{8}{7}\neq \frac{9}{8}$

Since the given table has different ratio, therefore it is not an exponential function. Option D is incorrect.

3 0

3 years ago

Read 2 more answers

Round 45.983 to the nearest whole number, tenth and hundredth.

Nady [450]

Answer:

46

Step-by-step explanation:

if you round to the nearest whole, look at the tenths place and if it is bigger than 4, then then you round up, like 7043.7305 to 7044 but if the tenths place is smaller than 5, the number stays the same but the decimal part is gone, like 350.24569405 to 350.

8 0

3 years ago

In a geometric series, the first term is 108 and the common ratio is \frac{2}{3}. Find the sum of the first 8 terms.

Valentin [98]

Answer:

311.36

Step-by-step explanation:

For a geometric series sum of first n terms is $a(1-r^n)/(1-r)$

if r is less than 1.

where a is the first term and r is the common ratio.

____________________________\

given

a = 108

r = $\frac{2}{3}.$

n = 8

thus , sum of n term is

$a(1-r^n)/(1-r)\\=>108(1-(2/3)^8)/(1-2/3)\\=> 108 (1 - 256/6561)/1/3\\=> 108(6561-256)/ 6561/1/3\\=> 108(6305)/2187\\=>311.36$

Thus sum of first 8 terms is 311.36

7 0

3 years ago