3 years ago

Rob,Caryn, and Sari are pairing up to play a series of chess matches. In how many different ways can they pair up

Mathematics

2 answers:

lyudmila [28]3 years ago

7 0

Answer:

Its either 6 or 8

Step-by-step explanation:

Nina [5.8K]3 years ago

5 0

Answer:

3c2 = 3

Step-by-step explanation:

there are 3 of them, and only 2 can play at a time. So you would have 3 choose 2

3c2 = 3

so they can pair up in 3 ways

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Algebraically solve the systems of equations by using f(x)=g(x). <br> f(x)=x^2-6x+10<br> g(x)=x^2-2

Kaylis [27]

Answer:

x=2

Step-by-step explanation:

3 0

4 years ago

The slope goes through (2,5) and (7,r) and equals 1/3 what is r

myrzilka [38]

The fromula of a slope:

$m=\dfrac{y_2-y_1}{x_2-x_1}$

We have

$(2,\ 5);\ (7,\ r),\ m=\dfrac{1}{3}$

Substitute:

$\dfrac{r-5}{7-2}=\dfrac{1}{3}\\\\\dfrac{r-5}{5}=\dfrac{1}{3}\qquad|\text{cross multiply}\\\\3(r-5)=(5)(1)\qquad|\text{use distributive property}\\\\3r-15=5\qquad|\text{add 15 to both sides}\\\\3r=20\qquad|\text{divide both sides by 3}\\\\r=\dfrac{20}{3}$