Answer:
100 + 60 + 8 + 0.7
Step-by-step explanation:
Expanded form or expanded notation is a way of writing numbers to see the value of individual digits.
Let's call the younger student's age A and the older student's age B. The teacher's age will be T.
B = 2A
T = 5B
T+5 = 5(A+5)
Simplify the last equation.
T+5 = 5A+25
T = 5A+20
Now we have two equations solved for T, so we can set them equal to each other.
5B = 5A + 20
We can plug 2A in for B
5(2A) = 5A + 20
10A = 5A + 20
5A = 20
A = 4
To find T, we plug 4 in for A in T = 5A + 20
T = 5(4) + 20
T = 40
The answer is 40 years old.
/ 357 + 71= 427 you’ve got to add it to get the sum of the numbers together
D = √(x2 - x1)^2 + (y2 - y1)^2) =
= √(6 + 1)^2 + (-2 - 4)^2) =
= √ (7^2 + 6^2) =
= √(49 + 36) =
= √85
Answer:
3.4
Step-by-step explanation:
5t+5/4-1=4t-3/5. cross multiply over the bracket
(5t+5)5=(4t-3)(4-1)
25t + 25 = -16t -4- 12 - 3
Combine the like terms
25t - 16t +4t = -4-12-3-25
13t = - 44
Divide both sides by 13
3.38
3.4 approximately