I hope this helps you
a=4
b=9
c= -1
disctirminant =b^2-4ac
disctirminant =9^2-4.4. (-1)
disctirminant =97
x1=-9+square root of 97/2.4= -9+square root of 97/8
x2= -9-square root of 97/2.4= -9-square root of 97/8
Answer:

Step-by-step explanation:
x-7y = -49
i) move x to the right-hand side and change its sign
-7y = -49-x
ii) change the signs on both sides of the equation
7y = 49+x
iii) divide both sides of the equation by 7


iv) use the commutative property to reorder the terms
* commutative property: a+b = b+a

Answer:
0.5 bar
Step-by-step explanation:
:)
Answer:
Step-by-step explanation:
March end is 15*2=30+15 =45
April 45*2=90+45=135
By may james will have enough money for phone
Answer:
11 minute
Step-by-step explanation:
22 min/2 miles
11 min/ 1 mile