4 years ago

10. (01.05)

Mathematics

2 answers:

VMariaS [17]4 years ago

7 0

Answer:

The second one , I think

Step-by-step explanation:

Vikki [24]4 years ago

4 0

Answer:

all work is shown and pictured

You might be interested in

The second term in a geometric sequence is 20. The fourth term in the same sequence is 11.25. What is the common ratio

damaskus [11]

Let $a_n$ be the n'th term of the sequence.

so $a_1$ is the first term, $a_2$ the second term and so on...

In a geometric sequence with $a_1=c$ , and common ratio r, the terms are as follows:

$a_1=c$
$a_2=cr$
$a_3=c r^{2}$
$a_4=c r^{3}$
.
.
that is, each term is its previous term times the common ratio r.

In our example

$a_2=cr=20$ and $a_4=c r^{3}=11.25$

$\frac{a_2}{a_4}= \frac{cr}{c r^{3}}= \frac{1}{ r^{2}}= \frac{20}{11.25}= 1.778$

so $r^{2} =1/1.778=0.56$

$r= \sqrt{0.56}= 0.75$

Answer: r=0.75

3 0

3 years ago

I’ll give 15. What is the missing side length in the triangle below?

Dmitry [639]

Answer:

40 ft

Step-by-step explanation:

The fiagram shows the right triangle (one angle is right angle).

By the Pythagorean theorem,

$\text{Leg}_1^2+\text{Leg}_2^2=\text{Hypotenuse}^2$