Answer:
no lo sé
Step-by-step explanation:
Number of boxes number of pencils?
Answer:
5. 3/5-2/5=1/5; answer is 1/5
6.7/10-3/10=4/10; answer is 2/5(simplify)
7.5/6-4/6=1/6; answer is 1/6
8.3/4-2/4=1/4; answer is 1/4
Step-by-step explanation:
Explanation is above, when subtracting fractions remember that the denominator must be the same and you can subtract the numerator.
Hope this helps!
Answer:
T = 4.541
Step-by-step explanation:
We don't have the standard deviation for the population, so we use the t-distribution.
The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So
df = 4 - 1 = 3
98% confidence interval
Now, we have to find a value of T, which is found looking at the t table, with 3 degrees of freedom(y-axis) and a confidence level of 
. So we have T = 4.541
Answer:
x²+ x = 0
x ( x +1 ) = 0
x = -1
x³-25x=0
x ( x² - 25 ) = 0
x² = 25
x = 5
x²=4x
x² - 4x = 0
x ( x- 4 ) = 0
x = 4
4x²-4x=1
4x²-4x - 1 = 0
4 x² - 2x - 2x - 1 = 0
2x ( 2x - 1 ) - 1 ( 2x- 1 ) = 0
2x- 1 ) ² = 0
2x = 1
x = 1/ 2
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