Answer:
Jackie's age = 12 years and Her sister's age = 16 years
Step-by-step explanation:
Let the age of Jackie be x.
Her sister's age = (x+4)
The sum of ages = 28
ATQ,
x+x+4 = 28
2x+4 = 28
2x = 24
x = 12
Jackie's age = 12 years
Her sister's age = (12+4) = 16 years
Hence, this is the requiredsolution.
Answer:
they are all expressions except D) 6y + 1z = 7x - 3w which is an equation, B
4x ^ 2
2
- 6 it is not known because it is poorly written.
Step-by-step explanation:
Which of the following is NOT an expression?
A 3x + 1 (expression)
B 4x^2 2- 6 (unknow)
C) 5b (expeession)
<u><em>D) 6y + 1z = 7x - 3w (Equation)</em></u>
Answer:D
Step-by-step explanation:The simplified version of the equation is D and the answer of the equation is 610
QUESTION 12
The given equations are;
and
Make y the subject in equation (2).
We put this equation (3) into equation (1) to get;
Expand;
Put into equation (3)
QUESTION 12
The given equations are
and
Make y the subject in equation (2)
Put equation (3) into (1)
Put into equation (3).
QUESTION 13
The given equations are
Make x the subject in equation (3).
Put equation (4) into equation (1)
Put equation (4) into equation (2)
Put z=1 in equation (5)
Put y=2 and z=1 into equation(4)