Use the quadratic formula to find both solution to the quadratic equation given below 3x^2-7x-1=

The correct option is B  x= 7 ±÷ 6 .

Step-by-step explanation:

Given :  Quadratic equation -7x-1 = 0.

To find : Use the quadratic formula to find both solution to the quadratic equation.

Formula used : Quadratic formula a + bx + c =0 , where "a", "b", and "c" are just numbers  x= -b ±÷ 2a.

Explanation : Compare the a + bx + c =0 by  -7x-1 = 0.

a = 3 , b = -7 , c = -1 .

Plugging the values a,b,c in formula.

    x= -(-7) ±÷ 2*3.

   x= 7 ±÷ 6.

  x= 7 ±÷ 6.

Therefore, The correct option is B , x= 7 ±÷ 6.

d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;

your answer   is c

step-by-step explanation: