4 years ago

The cost for 3 bracelets is 18 how much would it cost for 5 bracelets

Mathematics

1 answer:

Reil [10]4 years ago

8 0

18÷3=6 for one bracelet
for 5 of them 6×5=30

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3 years ago

Which ordered pair is a solution to the system of linear equations Y= -7x+2 and y=9x-1

evablogger [386]

$\left\{\begin{array}{ccc}y=-7x+2\\y=9x-1\end{array}\right\Rightarrow 9x-1=-7x+2\\\\9x-1=-7x+2\ \ \ |+1\\9x=-7x+3\ \ \ |+7x\\16x=3\ \ \ \ |:16\\x=\dfrac{3}{16}\\\\\text{substitute the value of x to the second equation}\\\\y=9\cdot\dfrac{3}{16}-1\\\\y=\dfrac{27}{16}-\dfrac{16}{16}\\\\y=\dfrac{11}{16}\\\\\text{The solution is}\ \left(\dfrac{3}{16};\ \dfrac{11}{16}\right)$