A Variable is a symbol for a number we don't know yet. It is usually a letter like x or y.
A number on its own is called a Constant.
A Coefficient is a number used to multiply a variable (4x means 4 times x, so 4 is a coefficient)
Answer:
15.4 Liters
Step-by-step explanation
1 kilometere x 2.2 liters = 2.2 liters
7 kilometeres x 2.2 liters = 15.4 liters
#6. the answer is 12 it increases by 4 every time
#8. the answer is every week he runs his miles increase by 5
Answer:
x=5.70156211,−0.70156211
Step-by-step explanation:
Subtract 5 from both sides.
r+5−5>12−5
r>7
Answer : r>7
Simplify both sides of the inequality.
1/9r<10
Multiply both sides by 9.
9*(1/9r)<(9)*(10)
r<90
Answer : r < 90
