The 10 tons should have 37.9% cement.
Let the 25% mixture be x tons
Then the 68% mixture will be (10 -x) tons.
Using formula for mixtures:
Let p for percentage and w for weight in tons.
p₁w₁ + p₂w₂ = pw
25*x + 68*(10-x) = 37.9*10
25x + 680 - 68x = 379
680 - 43x = 379
680 - 379 = 43x
301 = 43x
43x = 301
x = 301/43
x = 7
Recall that x, was for the 25% mixture, 7 tons.
a) For the 68% mixture, = 10 - x = 10 -7 = 3 tons.
b) For the 25% mixture = x = 7 tons.
10 years makes up one decade, hope this helps!
Answer:Week 1: $35.40
Week 2: $40.90
Week 3: $46.40
Week 4: $51.90
Step-by-step explanation:
29.90 + 5.50(x) = y
replace x with 1, 2, 3, or 4 for each week.
Answer:
x = 35.8°
Hope this helps...Have a good day!!
from the given graph the point (2,120) shows that the heartbeat of and active bear is 120 in 2 minutes.
