Answer:
x
≥
−
3
Step-by-step explanation:
The change in temperature has dipped from -2 degrees Celsius to -10 degrees Celsius, meaning there is a negative diversification.
-10 degrees Celsius is equal to 14 degrees Fahrenheit.
-2 degrees Celsius is equal to 28.40 degrees Fahrenheit.
Thus, the temperature gap is 14.40 degrees Fahrenheit.
Answer:
The correct answer is D
Step-by-step explanation:
Answer:
Step-by-step explanation:
To use the quadratic formula, we must write the quadratic in standard form, viz:
2x^2 - 4x + 7 = 0
Start by calculating the discriminant. That's b^2 - 4(a)(c). Here,
a = 2, b = -4 and c = 7, and so the discriminant for this particular problem is
(-4)^2 - 4(2)(7), or 16 - 56, or 40.
Recall that a positive discriminant indicates two real, unequal roots.
Now we write out the whole quadratic formula, with the appropriate constants inserted (see above):
-(-4) ± √40 4 ± (√4)(√10) 4 ± 2√10
x = --------------------- = ---------------------- = ---------------
2(2) 4 4
2 ± √10
which reduces to x = --------------
2
3
8(3)(1/2)=12
2(1/2)(4)=4
12/4=3
