Answer:
a
Step-by-step explanation:
given a quadratic equation in standard form
ax² + bx + c = 0 ( a ≠ 0 )
then the discriminant
Δ = b² - 4ac
• if b² - 4ac > 0 then 2 real solutions
• if b² - 4ac = 0 then 2 real and equal solutions
• if b² - 4ac < 0 then no real solutions
given
x² - 3x = - 4 ( add 4 to both sides )
x² - 3x + 4 = 0 ← in standard form
with a =
b = - 3 , c = 4
then
b² - 4ac = (- 3)² - ( 4 ×
× 4) = 9 - 12 = - 3
since b² - 4ac < 0 then equation has no real solutions
I’m not sure how but I’m pretty sure that’s slope formula
Answer:
<em>Add the area of the rectangle with the area of the triangle.</em>
Step-by-step explanation: I just took took the test
Answer:
The basic differences between syllabus and curriculum are explained in the point given below: The syllabus is described as the summary of the topics covered or units to be taught in the particular subject. Curriculum refers to the overall content, taught in an educational system or a course.
Step-by-step explanation:
This is the link for more info https://keydifferences.com/difference-between-syllabus-and-curriculum.html
Answer:
(A) 0.0039
Step-by-step explanation:
Problems of normally distributed samples can be solved using the z-score formula.
In a set with mean
and standard deviation
, the zscore of a measure X is given by:

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
In this problem, we have that:

The probability that the nitrite level is less than 2 ppm is 0.0918.
This means that when
, Z has a pvalue of 0.0918. So when X = 2, Z = -1.33.
We use this to find 






Which of the following is closest to the probability that on a randomly selected day the nitrite level will be at least 5 ppm
This is 1 subtracted by the pvalue of Z when X = 5. So



has a pvalue of 0.9961
1 - 0.9961 = 0.0039
So the correct answer is:
(A) 0.0039