I think , in my opinion it’s is the middle I’m not that sure but if u can try then good luck
You just find the lowest denominators
Answer:
<h2>30</h2>
Step-by-step explanation:
<h3>to understand the steps</h3><h3>you need to know about:</h3>
- system of linear equation
- word problems
- PEMDAS
first step
let's create the equation word problem
<h3>my mother's current age is four times the sum of the ages of my two sisters. After 5 years, my mother's age will be double the sum of the ages of my two sisters. What is the current age of my mother? (imaginary problem)</h3>
let's solve
let my mother's and sister's age be x and y respectively
according to the first condition,x=4y....(I)
according to the 2nd condition,x+5=2(y+5×2).....(ii)
so the system of linear equations is
x=4y
x+5=2(y+5×2)
gets from the second equation
x+5=2(y+10)
x+5=2y+20
4y+5=2y+20 (as x=4y)
2y=15
y=7.5
so the age of mother is
x=4.(7.5)
x=30
Answer:
5 months
Step-by-step explanation:
Value m= months
Gym A Money needed to pay= 30m+ 39
Gym B Money needed to pay= 20m+ 89
30m+ 39= 20m+ 89
Now isolate m
(30m-20m) + (39-39)= (20m-20m) + (89-39)
10m = 50
10m/10= 50/10
m=5; You can plug this number in to check my answer.
The exact value.tan-1(-1) = -45 degrees
or
360 - 45 = 315 degrees
Hope it Helps
