3 years ago

Help ASAP please!!! With alll blanks First answer and correct answer gets the brain..

Mathematics

1 answer:

Olegator [25]3 years ago

4 0

Both 28 I think I just multiplied 7×4 and on the light side is still the same length so that means that is also 4 for A

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uysha [10]

Answer:

Step-by-step explanation:

1) 165

2) 108

3)24

4) 75

5)2

6)7

3 0

3 years ago

Which choice is the explicit formula for the following geometric sequence?0.5, -0.1, 0.02, -0.004, 0.0008, ...

Minchanka [31]

$a_1=0.5\\a_2=-0.1\\a_3=0.02\\a_4=-0.004\\a_5=0.0008\\\\a_n=a_1\cdot q^{n-1}\\\\q=a_2:a_1\to q=-0.1:0.5=-0.2\\\\a_n=0.5\cdot(-0.2)^{n-1}=0.5\cdot(-0,2)^n\cdot(-0.2)^{-1}\\\\=0.5\cdot(-0.2)^n\cdot(-5)=-2.5\cdot(-0.2)^n\\\\\boxed{a_n=-2.5\cdot(-0.2)^n}$