The answer is A. True hope this right
Answer:
15 cm (make sure to not put value with answer (cm))
Step-by-step explanation:
9x9 = 81
12x12 = 144
81+144 = 225
= 15
Answer:
-1 1/2
Step-by-step explanation:
Answer:
(a) 
(b) 
(c) At 4 weeks, when both will be seeing an average of 3 hours of TV.
Step-by-step explanation:
a) For the students, they start at X(0)=5 h and ΔX=-0.5 h/week.
We can write
b) For the professors, they start at X(0)=1 h and ΔX=+0.5 h/week.
We can write
c) The seew which they will be watching the same amount of hours will be the 4th week.
The amount of hours will be
Let the weight of the first alloy will be x grams.
Weight of gold will be 0.1x grams, weight of lead will be 0.15x grams.
Let the weight of the second alloy <span>will be y grams.
</span><span>Weight of gold will be 0.3y grams, weight of lead will be 0.4y grams.
</span>Summarizing:
0.1x+<span>0.3y=60 - gold
</span><span>0.15x+0.4y=88 - lead
</span>
0.1x+<span>0.3y=60 * 10
</span><span>0.15x+0.4y=88 * 100
</span>
x+3y=600 * 15
15x+40y=8800
15x+45y=9000
<span>15x+40y=8800
</span>
<span>15x+45y=9000 /15
</span>45y-40y=9000-8800
x+3y=600
5y=200
x+3y=600
y=40
y=40
x=600-3*40=480
y=40
<span>x=480</span>
↑The answers.
