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zzz [600]
3 years ago
13

Simplify the expression -3÷(-2/5)​

Mathematics
2 answers:
LenKa [72]3 years ago
6 0

Answer:

\frac{15}{2} or 7.5 (they're the same)

Step-by-step explanation:

  1. Write it out: \frac{-3}{-\frac{2}{5} }  
  2. Simplify: \frac{3}{\frac{2}{5} }
  3. 3 ÷ 2/5 = 3 × 5/2
  4. 3 × 5/2 = 15/2 or 7.5
notsponge [240]3 years ago
4 0

Answer:

7\frac{1}{2}

Step-by-step explanation:

-3:-\frac{2}{5}= \\=-\frac{3}{1}*-\frac{5}{2}\\\\=\frac{-3*-5}{2}\\ \\=\frac{15}{2}\\ \\=7\frac{1}{2}

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A function has a constant doubling time. What type of function does it represent?
morpeh [17]

Answer:

ANSWER:

An exponential growth function has constant doubling time.

Step-by-step explanation:

EXPLANATION:

The formula for calculating exponential growth is

A=A'e^kt

here:

A=amount after growth

A'=initial value

e=2.718

k=continuous growth rate

t=time passed


3 0
3 years ago
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Which of the following is the reciprocal of x2 – 2x – 8?
Ann [662]
Hi again

x² - 2x - 8
Factor
= (x + 2)(x -4)
Answer : A is the correct option.


If you wanna check if A is the right answer, I will solve it for you and it will you give you the exact answer which will be x² - 2x - 8
(x+2)(x-4)
Distribute
(x)(x) + (x)(-4)+(2)(x)+(2)(-4)
= x² - 4x + 2x - 8
= x² - 2x - 8
Here it is, we find the exam answer.

Thus, (x+2)(x-4) is the reciprocal of x² -2x - 8


I hope that's help !
6 0
3 years ago
PLZ HELP<br> image below
Reil [10]

Answer:

There is no image, and I am not sure if I can answer this

Step-by-step explanation:

5 0
3 years ago
Prove that 25^11 - 5^19 is divisible by 31.
Stells [14]

Answer:

See below  

Step-by-step explanation:

                                        25¹¹ - 5¹⁹

Convert to base 5       = (5²)¹¹ - 5¹⁹

                                    =  5²²   - 5¹⁹

Factor out the GCF     =  5¹⁹(5³ - 1)

                                    =  5¹⁹(125 - 1)

                                    =  5¹⁹ × 124

                                    =  5¹⁹ × 4 × 31

31 is a factor of 25¹¹ - 5¹⁹, so the expression is divisible by 31.

7 0
3 years ago
Find the lowest common multiple (LCM) of 12 and 30​
snow_lady [41]

Answer: 2

Step-by-step explanation: 2 times 6 and 2 times 15

7 0
3 years ago
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