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2 years ago

9

Evaluate the expression when m=−6. m−(−8)=

1 answer:

masya89 [10]2 years ago

7 0

The answer would be 2.
-6 - (-8)
-6 + 8
2

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What is 3/8 divided by 4/5

olasank [31]

So,

To divide a fraction by a fraction, all you need to do is invert the second fraction and multiply the resulting fractions.

Step 1: Flip the second fraction.
$\frac{3}{8} / \frac{5}{4}$

Step 2: Multiply the fractions.
$\frac{15}{32}\ or\ 0.46875\ or\ 46.875\ percent$

6 0

2 years ago

I need help with this question

Murrr4er [49]

The number of cows is given by

$14\cdot 2^{\frac{y}{5}}$

So, after $k$ years, the number of cows will be

$14\cdot 2^{\frac{y+k}{5}}$

We want this number to be twice as much as the original:

$14\cdot 2^{\frac{y+k}{5}} = 2(14\cdot 2^{\frac{y}{5}})$

First of all, we can cancel 14 from both sides:

$2^{\frac{y+k}{5}} = 2\cdot 2^{\frac{y}{5}}$

Finally, on the right hand side, we can use the exponent rule

$a^b\cdot a^c=a^{b+c}$

to get

$2^{\frac{y+k}{5}} = 2^{\frac{y}{5}+1}$

To solve this equation, we must impose that the two exponents are the same:

$\dfrac{y+k}{5} = \dfrac{y}{5}+1 \iff \dfrac{y+k}{5} = \dfrac{y+5}{5}$

And clearly this is true if and only if $k=5$ . So, it will take 5 years for the cow heard to double in number.

You can do the exact same steps to find the doubling time for the sheeps.

8 0

3 years ago

The rectangular prism (on the left) has a volume of 120 in. Find the volume of the rectangular pyramid (on the right) with the s

hram777 [196]

Answer:

A: 40in

Step-by-step explanation:

Volume of a rectangular pyramid is V= lwh/3

V= ((4)(5)(6))/3

V= 40 in

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2 years ago

Sam purchases a new car for $29,500. The car depreciates at a rate of 13.25% per year. What is the value of the car after 7 year

miv72 [106K]

Answer:

10907.078

Step-by-step explanation:

29500 × .8675 × .8675 × .8675 × .8675 × .8675 × .8675 × .8675 = 10907.0775302

rounded to 10907.078

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3 years ago

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yKpoI14uk [10]

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3 years ago