All categories

4 years ago

Would be nice to if somebody helped me.

Mathematics

1 answer:

Yuri [45]4 years ago

6 0

Answer:

1,456

Step-by-step explanation:

The sum of n terms of a geometric sequence with first term a1 and common ratio r is given by ...

Sn = a1·(r^n -1)/(r -1)

For your series with a1=4, r=3, and n=6, the sum is ...

S6 = 4·(3^6 -1)/(3 -1) = 2·728 = 1,456

You might be interested in

Carleigh makes $10 more than sheryl (s) does per hour. Carleigh makes $22 an hour. which equation can be used to figure out how

Ratling [72]

It’s the first one s+10=22

5 0

3 years ago

A car traveled 133 miles in 4 3/4 hours. What was the cars average speed in miles per hour?

nirvana33 [79]

4 3/4 = 19/4

133/(19/4) = 133(4/19) = 1197/19 = 63 mph

6 0

3 years ago

F + 0.3 < 1.7<br> I need help with this question its tricky

Ainat [17]

F + 0.3 < 1.7

Subtract 0.3 on both sides

F < 1.4

Your final answer is F < 1.4

7 0

3 years ago

Describe the solutions for the quadratic equation shown below:

PtichkaEL [24]

The solutions for the quadratic equation 9x² - 6x + 5 = 0 are A. 2 complex roots

To determine the the type of roots the quadratic equation 9x² - 6x + 5 = 0, we use the quadratic formula to find the roots.

So, for a quadratic equation ax + bx + c = 0, the roots are

$x = \frac{-b +/- \sqrt{b^{2} - 4ac} }{2a}$

With a = 9, b = -6 and c = 5, the roots of our equation are

$x = \frac{-(-6) +/- \sqrt{(-6)^{2} - 4 X 9 X 5} }{2 X 9} \\x = \frac{6 +/- \sqrt{36 - 180} }{18} \\x = \frac{6 +/- \sqrt{-144} }{18} \\x = \frac{6 +/- \sqrt{-12} }{18}\\x = \frac{6}{18} +/- i\frac{12}{18} \\x = \frac{1}{3} +/- i\frac{2}{3} \\x = \frac{1 + 2i}{3} or \frac{1 - 2i}{3}$

Since the roots of the equation are (1 + 2i)/3 and (1 - 2i)/3, there are 2 complex roots.

So, the solutions for the quadratic equation 9x² - 6x + 5 = 0 are A. 2 complex roots

Learn more about quadratic equations here:

brainly.com/question/18117039

5 0

3 years ago

An equilateral triangle has sides of length s. If each side is increased by 15, represent the new perimeter in terms of s.

mrs_skeptik [129]

We know that an equilateral triangle has all sides equal.
Initial perimeter = s + s + s = s
Each side has been increases by then the new perimeter is:

(s+15) + (s+15) + (s+15) = 3s + 45

So the new perimeter = 3s + 45

5 0

4 years ago

Would be nice to if somebody helped me. ​

Would be nice to if somebody helped me.