4 years ago

I need help Someone know that answer ??

Mathematics

2 answers:

Elanso [62]4 years ago

3 0

Answer: y= -3x + 10

Step-by-step explanation: i just did it

Romashka [77]4 years ago

3 0

X=3 because if u chart it on scale x goes through 3 evenly and it’s a straight line therefore 3 makes the equation linear

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Andreyy89

$\displaystyle\sum_{i=3}^{10}(2i-9)=2\sum_{i=3}^{10}i-9\sum_{i=3}^{10}1$

Recall that

$\displaystyle\sum_{i=1}^n1=n$

$\displaystyle\sum_{i=1}^ni=\frac{n(n+1)}2$

Your sums start at $i=3$ , so in order to apply these formulas directly, you need to compensate for the missing first two terms:

$\displaystyle\sum_{i=3}^{10}1=\sum_{i=1}^{10}1-(1+1)=10-2=8$

$\displaystyle\sum_{i=3}^{10}i=\sum_{i=1}^{10}i-(1+2)=\frac{10\cdot11}2-3=52$

$\implies\displaystyle\sum_{i=3}^{10}(2i-9)=2\cdot52-9\cdot8=\boxed{32}$

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Step-by-step explanation:

well it represents

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