3 years ago

-5/5 x 18/25 pls tell me

Mathematics

1 answer:

I am Lyosha [343]3 years ago

8 0

Answer:

-.72

Step-by-step explanation:

(-5/5)*(18/25)

(-1)*(18/25)

(-1)*(.72)

-.72

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<u>Step-by-step explanation:</u>

$\sum^4_1[100(-4)^{n-1}]\qquad \rightarrow \qquad a_1=100\ \text{and r = -4}\\\\\\S_n=\dfrac{a_1(1-r^n)}{1-r}\\\\\\\\S_4=\dfrac{100(1-(-4)^4)}{1-(-4)}\\\\\\.\quad=\dfrac{100(1-256)}{1+4}\\\\\\.\quad=\dfrac{100(-255)}{5}\\\\.\quad=20(-255)\\\\.\quad=-5100\\$