Answer:
=10x2−8
Step-by-step explanation:
4(x2−5)+2(3x2+6)
Distribute:
=(4)(x2)+(4)(−5)+(2)(3x2)+(2)(6)
=4x2+−20+6x2+12
Combine Like Terms:
=4x2+−20+6x2+12
=(4x2+6x2)+(−20+12)
=10x2+−8
Answer:
Step-by-step explanation:
X no of questions student answers is binomial with n =40 and p =0.5
If approximated to normal, X is Normal with
mean = np = 20 and variance = npq = 10
P(X>N) >0.10
We use std normal distribution table to get z value first then convert to x value
So 
This is with continuity correction.
Hence without continuity correction this equals 7.2-0.5 = 6.7
x>6.7
n = 7
Answer:
3375
Step-by-step explanation:
15 times 15 times 15 = 3375
Answer:
Step-by-step explanation:
Goal 1: Solve for x: Subtract 6y from both sides. This yields -4x = -6y - 30.
Change all the signs to +. We get 4x = 6y + 30. Dividing all terms by 4 yields x = (3/2)y + 15/2.
Goal 2: Solve for y. Add 4x to both sides. Then 6y = 4x - 30, or y = (2/3)x - 5
Answer:
$802.75
Step-by-step explanation:
1235x0.35=432.25
1235-432.25=802.75
