Answer:
y=x+8 because your friend's allowance is y but also $8 more than yours, x. x+8 is her allowance so x+8=y
Answer: 3.87 * 10^5, or 387000
Step-by-step explanation:
Move the decimal to the left and increase the power.
If you want to have it expanded, move the decimal point to the right 4 times of the original to get 387000.
Answer:
the largest possible value of x is 21
Step-by-step explanation:
39/x =3
3x =39
x=39/3
x= 13
51/x =3
3x =51
x= 51/3
x= 17
63/x =3
3x= 63
x= 63/3
x= 21
12 + 0.15m = 10 + 0.25m
0.15m - 0.25m = 10 - 12
- 0.10m = -2
m = -2/-0.10
m = 20
At 20 miles, the cost of the two taxi services will be the same.
Add 121/4 to each side:
x²+11x+121/4 < 121/4-8
x²+11x+121/4 < 89/4
(x+11/2)² < √89/2 ⇒ -√89/2 < x+11/2 < √89/2
-11/2-√89/2 < x < -11/2+√89/2