Answer:
The given statement is true.
Step-by-step explanation:
A basic variable in a linear system is a variable that corresponds to a pivot column in the coefficient matrix.
The statement is true.
This statement is the definition of a basic variable.
We can also say that a basic variables are 'n' variables that can take any value other than zero.
60 miles per hour
distance=rate times time
first part
rate=60mph
time=3h
distance=60mph times 3h=180 miles
part 2
time=2 hours
rate=70mph
distance=70mph times 2h=140miles
total is 180mi+140mi=320miles
Answer:
x=13, A=169
P=4s, so you substitute P with 52 and you're left with 52=4a. You divide 4 to both sides of the equation and a(or x) equals 13.
A=s^2, so since your side(x) equals 13 you calculate 13^2 or 13×13, and A=169.
Answer:
42 1/7 degrees
Step-by-step explanation:
65+7x=360
7x=295
x=42 1/7
A²+b²=c²
39²+b²=89²
1521+b²=7921
subtract 1521 from both sides
b²=6400
so then you square both sides
√6400
80
