All categories

3 years ago

Which explicit and recursive formulas match the geometric sequence 5, 15, 45, 135...?

Mathematics

1 answer:

lisov135 [29]3 years ago

5 0

Answer:

155

Step-by-step explanation:

because he's skipping

You might be interested in

WILL VOTE BRAINLIEST!!! PLEASE HELP!!! URGENT!!!

maw [93]

D) Two lines that intersect at 90 degree angles
hope this helps

6 0

4 years ago

1.what is the volume of the small cone in terms of pi

svp [43]

Step-by-step explanation:

Step 1: Find the radius of the big cone

$\frac{radius_1}{height_1} = \frac{radius_2}{height_2}$

$\frac{2}{5}=\frac{x}{10}$

$2(10)=5(x)$

$20/ 5=5x / 5$

$4=x$

Step 2: Find the volume of the small cone

$V = \frac{\pi*r^2*h} {3}$

$V = \frac{\pi * 2^2 * 5}{3}$

$V = \frac{20\pi}{3}\ units^3$ ← Volume of Small Cone

Step 3: Find the volume of the large cone

$V = \frac{\pi*r^2*h} {3}$

$V=\frac{\pi*4^2*10}{3}$

$V = \frac{160\pi}{3}\ units^3$ ← Volume of Large Cone

4 0

3 years ago

A light private plane can fly 120 mph in still air. Flying against the wind, the plane can fly 320 miles in the same time it req

Debora [2.8K]

Alright, lets get started.

A light private plane can fly 120 mph in still air.

Suppose the speed of wind = x mph

Against the wind, speed of plane will be = 120-x

With the wind, speed of plane will be = 120+x

Flying against the wind, the plane can fly 320 miles, so time taken will be

t = $\frac{320}{120-x}$

With the wind, the plane can fly 640 miles, so time taken will be

$t = \frac{640}{120+x}$

Both times are given same, so

$\frac{320}{120-x}= \frac{640}{120+x}$

Cross multiplying

$320(120+x) = 640(120-x)$

Dividing from 320

$120+x = 2(120-x)$

$120+x = 240-2x$

$3x = 120$

x = 40 mph

So, the speed of the wind is 40 mph. : Answer

Hope it will help :)

3 0

3 years ago

What is the perimeter of this? I am soooooooooo confused. Also, this is Algebra.

satela [25.4K]

Answer:

$P=3x+2$

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Which exponential equation is equivalent to this logarithmic equation?

Lubov Fominskaja [6]

Answer:

$\displaystyle B)x = {5}^{9}$

Step-by-step explanation:

we are given a logarithmic equation

$\displaystyle \log_{5}(x) - \log_{5}(25) = 7$

simplify the log:

$\displaystyle \log_{5}(x) -2 = 7$

add 2 to both sides:

$\displaystyle \log_{5}(x) = 9$

remember that,

$\displaystyle \log_{a}(b) = c \iff {a}^{c} = b$

so we obtain:

$\displaystyle x = {5}^{9}$

hence,

our answer is B)

4 0

3 years ago

Read 2 more answers