Answer: a-b+c+d =4
Step-by-step explanation:
The given system of equation is

from this we have the following matrices

the given matrix A =
On comparing Matrix
with Matrix A

we have the following values
a=2 ,b=4,c=8,d=-2
Thus a-b+c+d =2-4+8+(-2)=4
Answer:
d= 8.6 ft
Step-by-step explanation:
In similar triangles, the corresponding sides are in proportion.

To find the value of x,

d = 8.6 ft
Answer:
-9.375
Step-by-step explanation:
2 1/2 x (-3 3/4) = -9.375
Probability of 2 consecutive greens equals 4/9*3/8=1/6
Probability of not getting equals 1-1/6=5/6