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Alona [7]
3 years ago
7

How does finding the least common multiple of two numbers help you add fractions?

Mathematics
1 answer:
just olya [345]3 years ago
3 0
Because, actually, I'll give an example. 4/5 + 3/4, the LCM of the denominators is 20, so you would get this to be 16/20 + 15/20, which would equal 31/20, which equals 1 11/20.
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Renee is playing a game online. If she gets a total of 25 points, she will have a new
Mashutka [201]

Answer:

20 points

Step-by-step explanation:

key words: difference

Take the amount of points she has and subtract what she has

25-5

4 0
3 years ago
The first term of an arithmetic sequence is -5, and the tenth term is 13. Find the common difference.
dlinn [17]

\bf n^{th}\textit{ term of an arithmetic sequence} \\\\ a_n=a_1+(n-1)d\qquad \begin{cases} n=n^{th}\ term\\ a_1=\textit{first term's value}\\ d=\textit{common difference}\\[-0.5em] \hrulefill\\ a_1=-5\\ n=10\\ a_{10}=13 \end{cases} \\\\\\ a_{10}=a_1+(10-1)d\implies 13=-5+(10-1)d \\\\\\ 13=-5+9d\implies 18=9d\implies \cfrac{18}{9}=d\implies \boxed{2=d}

7 0
3 years ago
2.
abruzzese [7]

Answer:

  a) 30 kangaroos in 2030

  b) decreasing 8% per year

  c) large t results in fractional kangaroos: P(100) ≈ 1/55 kangaroo

Step-by-step explanation:

We assume your equation is supposed to be ...

  P(t) = 76(0.92^t)

__

a) P(10) = 76(0.92^10) = 76(0.4344) = 30.01 ≈ 30

In the year 2030, the population of kangaroos in the province is modeled to be 30.

__

b) The population is decreasing. The base 0.92 of the exponent t is the cause. The population is changing by 0.92 -1 = -0.08 = -8% each year.

The population is decreasing by 8% each year.

__

c) The model loses its value once the population drops below 1/2 kangaroo. For large values of t, it predicts only fractional kangaroos, hence is not realistic.

  P(100) = 75(0.92^100) = 76(0.0002392)

  P(100) ≈ 0.0182, about 1/55th of a kangaroo

5 0
3 years ago
what is the value of y in the solution to the following system of equations? (5 points) 2x y = −4 5x 3y = −6
TiliK225 [7]
2x+y=-4
5x+3y=-6

multiply first equaton by -5 and second by 2 then add them

-10x-5y=20
<u>10x+6y=-12 +</u>
0x+1y=8

y=8

the y value is 8
7 0
3 years ago
6x6=(6x6) + (6x6)<br> So, 6x6= ___ + ____
Annette [7]

Answer:

(6×6) + (6×6)

36. + 36 = 72

3 0
3 years ago
Read 2 more answers
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