Step-by-step explanation: There are 24 blue cars. If you Multiply 5 by 8 because that is the ratio of red cars, you multiply 3 by the same number. It gives you 24

5 0

4 years ago

What is the sum of the first 7 terms of the geometric series: -8 + (-4) + (-2) + 1 + 1/2+...

s2008m [1.1K]

$a_1=-8;\ a_2=-4;\ r=a_2:a_1\to r=-4:(-8)=\dfrac{1}{2};\ n=7\\\\S_n=\dfrac{a_1(1-r^n)}{1-r}\\\\subtitute:\\\\S_7=\dfrac{-8\left[1-\left(\dfrac{1}{2}\right)^7\right]}{1-\dfrac{1}{2}}=\dfrac{-8\left(1-\dfrac{1}{128}\right)}{\dfrac{1}{2}}\\\\=\dfrac{-8\cdot\dfrac{127}{128}}{\dfrac{1}{2}}=-\dfrac{127}{16}\cdot\dfrac{2}{1}=-\dfrac{127}{8}=-15\dfrac{7}{8}$

4 0

4 years ago

Click to correct any capitalization errors.

Naddika [18.5K]

Answer:

Step-by-step explanation:

Quidnet Beach in Massachusetts offers fantastic views of Sankaty Head Light, a lighthouse that overlooks the Atlantic Ocean.

5 0

3 years ago

Plzzzzz help 45 55 95

Phantasy [73]

Answer:

Step-by-step explanation:

yeah

8 0

4 years ago

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