Answer:
The sum of two numbers is 18.
5 times the first number subtracted from 4/7 of the second number is 14.
First number --> x
Second number --> y
so
x + y = 18 --> x = 18-y
5x - (4/7)y = 14
so
5 (18-y) - (4/7)y = 14
90 - 5y - 4/7 y = 14
-5.57 y = 14-90
y = 13.64
so
x = 18 - 13.64
x = 4.36
Answer:
5
Step-by-step explanation:
5z +9 - 4z
- All you have to do is substitute the value of z instead of the variable.
5(-4) + 9 - 4(-4)
-20 + 9 + 16
-11 + 16
5
My favorite is probably aweSAMdude
Answer:
x = 20
Step-by-step explanation:
The formula for the area of a triangle is
Area = 1/2 Base * Height
To find out what x is, plug the numbers in the formula
600 = 1/2 5x * 12
Multiply 5x by 12
600 = 1/2 60x
Multiply 1/2 by 60x
600 = 30x
Divide by 30
20 = x
To see if this is correct, plug it in again..
600 = 1/2 5(20) * 12
Simplify 5(20)
600 = 1/2 100 * 12
Multiply 12 by 100
600 = 1/2 1200
Multiply by 1/2
600 = 600
x is equal to 20
This is the disjunction of the statements.
Conjuction is like intersection(and) ∩/∧, and disjunction is like union(or) ∪/∨.
They have a similarity in the notation.
