Y(2y-3)(5y-1) check using foil
Answer: the probability it will come up heads 25 or fewer times is 0.019
Step-by-step explanation:
Given that;
n = 50
p = 0.65
so, q = 1 - p = 0.35
np = 50 × 0.65 = 32.5 ≥ 10
nq = 50 × 0.35 = 17.5 ≥ 10
so, we need to use Normal Approximation for the Binomial Distribution
μ = np = 50 × 0.65 = 32.5
σ = √(npq) = √( 50 × 0.65 × 0.35 ) = 3.3726
now, the probability that it will come up heads 25 or few times will be;
⇒ P( x≤25)
{using continuity correction}
⇒ P[ z < (25.5 - 32.5)/3.3726 ]
⇒ P[ z < -2.0755 ]
using z-table
= 0.01923 ≈ 0.019 { 3 decimal places}
Therefore the probability it will come up heads 25 or fewer times is 0.019
Answer:
hi
Step-by-step explanation:
The gradient(slope) is 3.
The y-intercept is 0.
Using the slope-intercept form,
y=3x%2B0
y=3x
Answer:
Estimate: $29.53
Step-by-step explanation:
$27.60 x 7% (0.07) = 1.932
27.60 + 1.932 = 29.532
Answer:
answer is down below
Step-by-step explanation:
2x^2 + 5x + 2 =0
multiply 2x^2 x 2 = 4x^2
find two numbers that multiply together to get 4 and add together to make 5
so 4 and 1.
Put them in back in the equation: 2x^2 + x + 4x + 2
split it up in the middle and factorise
so 2x^2 + x becomes x(2x+1)
and 4x+2 becomes 2(2x+1)
<u>so (x+2)(2x+1) is the answer</u>
