We use equations for geometric sequence. We do as follows:<span>
a(n) = a(1) r^(n-1)
20 = ar^(2-1)
</span>20 = ar<span>
a = 20/r
11.25= ar^(4-1)
</span>11.25 = ar^3
<span>11.25 = (20/r)r^3
r = 0.75
Hope this answers the question. Have a nice day.</span>
The answer is 1 1/2 hop it helped
Answer:
<h2>see the answers</h2>
Step-by-step explanation:
<h3>to understand this</h3><h3>you need to know about:</h3>
<h3>tips and formulas:</h3>
orders of PEMDAS:
- parentheses
- exponent
- multiplication or
- division
- addition or
- substraction
<h3>let's solve:</h3>
a)
- remove first parentheses and add: -6×[-12+26] =-6×[14]
- remove third parentheses and multiply:-6×14=-84
c)
- remove first parentheses and add:(6)×[-17+28]=6×[11]
- remove third parentheses and multiply: 6×11=66
e)
- remove first parentheses and substract:7×[-12-(6)]=7×[-12+(-6)]=7×[-18]
- multiply:7×[-18]=-126
Answer:
Step-by-step explanation:
A right angled triangle is given to us and we would like to find out the value of sin(A) .
From the triangle we can see that the measure of angle BAC is 30° . Therefore ,
On using sin both sides ,
As we know that the value of sin30° = 1/2. So;
Simplify by converting it into decimal ,
<u>Hence</u><u> </u><u>option</u><u> </u><u>B</u><u> </u><u>is</u><u> </u><u>correct</u><u> </u><u>.</u>
And we are done!
Answer:
60
Step-by-step explanation:
You need to think of it as an equation system.
First of all, let's call A the apple trees, P the pear trees and V the avocado's trees.
As for every 3 pear trees we have 4 apple trees, it can be written as:
4A = 3P
Then, we can clear the pears dividing both sides by 3:
4A/3 = 3P/3
(4/3)A = P
This is, we have one pear tree for every 4/3 apple trees.
Then we go to the other relation. For every 5 pears trees there are two avocados trees:
2V = 5P
As we want the ratio of avocados to apples we can replace the pear trees by it's expression depending on A:
2V = 5 ((4/3)A)
2V = (20/3) A
Multiplying both sides by 9 we make appear our 18 avocados trees:
2V *9 =( 20/3) A * 9
18 V = 60 A
So, for 18 avocados trees we have 60 apple trees.
