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4 years ago

How do you do this problem? Simple and concise explanation please! TOP ANSWERERS!!!!

Mathematics

1 answer:

charle [14.2K]4 years ago

4 0

Answer:

Just B and C

Step-by-step explanation:

Reduce this to the lowest amount possible.

log(3abc/6a^2b) = 2

=================

log(c/2a) = 2

c/2a = 10^2

c = 2a * 100

c = 200a

This one is also correct.

=================

The rest are just incorrect.

There is only 1 answer that works and that is B.

C is close, but it is not correct.

D is backwards. B is the right way and D is the upside down of B.

E and F are just not the way to handle logs. Subtracting logs means division, not multiplication and not 1 log.

=================

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Solve the following system of equations for a and for b:

viktelen [127]

Answer:

$a=3\\b=1$

Step-by-step explanation:

$9a+3b=30\\8a+4b=28$

Let's solve the second equation for a to later on replace it in the first equation.

$8a+4b=28\\8a=28-4b\\a=\frac{28-4b}{8}$

Now plug this into the first equation.

$9a+3b=30\\9(\frac{28-4b}{8})+3b=30$

Distribute the 9

$(\frac{252-36b}{8}) +3b=30$

Break down the fraction.

$\frac{252}{8}-\frac{36b}{8}+3b=30$

Simplify.

$\frac{63}{2}-\frac{9}{2}b+3b=30$

Subtract $\frac{63}{2}$

$-\frac{9}{2}b+3b=30-\frac{63}{2}$

Combine like terms.

$\frac{-9+2*3}{2}b=\frac{30*2-63}{2}$

$\frac{-9+6}{2}b=\frac{60-63}{2}$

$\frac{-3}{2}b=\frac{-3}{2}$

Muliply by the reciprocal or inverted fraction next to b.

$(-\frac{2}{3})(-\frac{3}{2}) b=-\frac{3}{2}(-\frac{2}{3})$

$b=1$

Now plug this value into any of the equations to find the value of a.

$8a+4b=28\\8a+4(1)=28\\8a+4=28\\8a=28-4\\8a=24\\a=\frac{24}{8}\\ a=3$

5 0

4 years ago

Can anyone help me with this problem

astraxan [27]

X - 6 1/3 < = 1 1/2 ....turn to improper fractions
x - 19/3 < = 3/2 ....add 19/3 to both sides
x < = 3/2 + 19/3 ...common denominator is 6
x < = 9/6 + 38/6
x < = 47/6 = 7 5/6....first answer choice

5 0

4 years ago

Nitella [24]

Answer:

s inversely proportional 1/t

s=0.3, t=8

s=k/t

0.3=k/8

k=0.3×8

k=2.4

find s when t=0.4

s=2.4/0.4

s=6.0 or 6

3 0

3 years ago

Let f(x) = x-5. Find f'(.r).

Verdich [7]

Answer:

Step-by-step explanation:

note : (ax)' = a

(b)' = 0

f(x) = x-5. so : f'(x) = 1

6 0

3 years ago

Which is the graph of f(x) = 100(0.7X?

Sunny_sXe [5.5K]

Answer:

context?

Step-by-step explanation:

theres no graph to choose from

4 0

3 years ago