Answer:
Both Ivan and Polina is correct.
Answer:
3.66 lb
Step-by-step explanation:
2/3=0.666
3+0.66=3.66
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.
Answer:
the estimated answer is B: 2.50.
<em>(</em><em>the</em><em> </em><em>exact</em><em> </em><em>answer</em><em> </em><em>is</em><em> </em><em>2</em><em>.</em><em>4</em><em>8</em><em>,</em><em> </em><em>but</em><em> </em><em>rounding</em><em> </em><em>up</em><em> </em><em>would</em><em> </em><em>make</em><em> </em><em>it</em><em> </em><em>2</em><em>.</em><em>5</em><em>0</em><em>)</em>
