Answer:
Our system of equations is:
We are looking for x
Let's express y using x
Replace x in the second equation with the result
- 4y-4x²-12x = -7
- 4(-2x-1)-4x²-12x = -7
- -8x-4-4x²-12x = -7
- -8x-4x²-12x = -7+4
- -4x²-20x = -3
- -4x²-20x+3 = 0 multiply by -1 to get rid of the - signs with x
- 4x²+20x-3=0
4x²+20x+3=0 is a quadratic equation
Let Δ be our discriminant
Δ= 20²-4*4*(-3)
Δ=448 > 0 so we have two solutions for x
let x and x' be the solutions
- x =
= -5.145 ≈ -5.15 - x'=
= 0.145≈ 0.15
so the solutions are:
-5.15 and 0.15
Answer:
The value of n is the size of the sample, the number of customers selected.
The value of p is 0.48.
The value of q is 0.52.
Step-by-step explanation:
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.
In which 
is the number of different combinations of x objects from a set of n elements, given by the following formula.
And p is the probability of X happening.
48% of consumers are comfortable having drones deliver their purchases.
This means that 
The value of n is the size of the sample, the number of customers selected.
Answer:
the thired grap.
Step-by-step explanation:
it is for the test i toke
To get the perimeter u need to add 4.8 +11 + 12 + 6.7 = 37.5 and to get the area u need to to multiple the length and width 11 x12 = 132
Answer:
First find the area of the square
(s x s)
10x10
=100
And then for the triangles
(1/2bh)
1/2 x 10 x 12
=60
since there are 4 triangles of the same area we will multiply 4 with the first triangle's area
60 x 4
=240
Total S.A= 240 + 100
=340 Square Inches
Option B
Hope it helps!
