Answer:
10
Step-by-step explanation:
product means multiplication, so
2 x 5 = 10
Answer:
a. SQR
RQS
b. QT
QR
c. Q
Step-by-step explanation:
lmk if you want an explanation
Answer:
Step 6 is missing the fact that the left hand side is raised to the second power.
Step-by-step explanation:
First cancel c from the left hand side by subtracting it from each side:
ax²+bx+c = 0
ax²+bx+c-c = 0-c
ax²+bx = -c
Next cancel a from the left hand side by dividing all terms by a:
ax²/a + bx/a = -c/a
x² + (b/a)x = -c/a
Next we will complete the square. We do this by dividing the second coefficient, b/a, by 2 and then squaring it; (b/a)÷2 = b/2a; (b/2a)² = b²/4a²
Add this to each side:
x²+(b/a)x+(b²/4a²) = -c/a + (b²/4a²)
Next we will find a common denominator on the right hand side. To do this, multiply the first term by 4a (to make the denominator 4a²):
x²+(b/a)x+(b²/4a²) = (-c*4a)/(a*4a) + (b²/4a²)
x²+(b/a)x+(b²/4a²) = -4ac/4a² + b²/4a²
We can write the left hand side as a squared binomial:
(x+b/2a)² = (b²-4ac)/4a²
Take the square root of both sides:
√(x+b/2a)² = √((b²-4ac)/4a²)
x+b/2a = √(b²-4ac)/2a
Subtract b/2a from each side:
x+b/2a - b/2a = √(b²-4ac)/2a - b/2a
x = (-b ± √(b²-4ac))/2a
Answer:
Yes, it would be statistically significant
Step-by-step explanation:
The information given are;
The percentage of jawbreakers it produces that weigh more than 0.4 ounces = 60%
Number of jawbreakers in the sample, n = 800
The mean proportion of jawbreakers that weigh more than 0.4 = 60% = 0.6 = =p
The formula for the standard deviation of a proportion is
Solving for the standard deviation gives;
Given that the mean proportion is 0.6, the expected value of jawbreakers that weigh more than 0.4 in the sample of 800 = 800*0.6 = 480
For statistical significance the difference from the mean = 2× = 2*0.0173 = 0.0346 the equivalent number of Jaw breakers = 800*0.0346 = 27.7
The z-score of 494 jawbreakers is given as follows;
Therefore, the z-score more than 2 × which is significant.
Answer:
c
Step-by-step explanation:
if you flop it over you can currently see which one it is