1. 7 = 4s + 19
7 - 19 = 4s
-12 = 4s
s = -3
2. x/4 + 8 = 16
x + (8 × 4) = 16 × 4
x + 32 = 64
x = 32
We get tne n-th term with: tn=1/3tn-1
We know that the first term is t1=81, so 81=1/3t*1-1
81=1/3t-1
82=1/3t
82*3t=1
3t=1/82
t=1/82*3=1/246
The second term is: 1/
2*(1/246)*2)-1
We get the third term by replacing n with 3 and so on...
Answer:
mais de 5 sacos 6 sacos y 1/4
Step-by-step explanation:
1 1/4 = 5/4
De la segunda feira a la sexta son 5 feiras
5/4 * 5 = 25/4
25/4 = 6 1/4
Using it's formula, considering the results, it is found that the accuracy of the test is of 0.95 = 95%.
<h3>What is the accuracy of a test?</h3>
It is given by the <u>number of correct results divided by the number of tests</u>.
In this problem, there were 80 tests, of which 80 - 2 - 2 = 76 had correct results, hence the accuracy is given by:
A = 76/80 = 0.95 = 95%.
More can be learned about the accuracy of a test at brainly.com/question/3128152
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