We shall use the z-table to solve for the margin of error. The formula for the margin of error is
The value of z will be taken with the assumption that the significance level is 5%. So, α=0.025. Then
.
So, based from this, the margin of error is
The margin of error is about 2%.
If said number is x, that means that twice (2 times) a number and 2x-7=13. Adding 7 to both sides, we get 2x=20 and by dividing both sides by 2 we get x=10. For 2, we see that the sum of a number and 6 is first priority, so we have (x+6)*7=-43. Dividing both sides by 7, we get x+6=-43/7. After that, we subtract both sides by 6 to get -43/7-6=x
To solve, you need to know how many 3/4 inch buttons Kara sorted.
Answer:
I think the answer is c because that would make the most sense
Step-by-step explanation:
Im not 100% tho
Answer:
x = 2 ± 
Step-by-step explanation:
Given
y = x² - 4x - 9
To find the zeros, set y = 0, that is
x² - 4x - 9 = 0 ( add 9 to both sides )
x² - 4x = 9
To complete the square
add ( half the coefficient of the x- term)² to both sides
x² + 2(- 2)x + 4 = 9 + 4, that is
(x - 2)² = 13 ( take the square root of both sides )
x - 2 = ± ( add 2 to both sides )
x = 2 ± ← exact solutions
