Answer:
320 yards
Step-by-step explanation:
Alright, there was a lot of addition, and you're just gonna have to trust me, the answer is 320 yards
Answer:
A= H<u>b B
</u>
2
Step-by-step explanation:
Q16- = A=75
cm
Q17- = A=10in
Q18- = A=70
Answer:
2.6
Step-by-step explanation:
Lets call x the amount of 18% solution and y the amount of 40% solution, and write as equations the info of the problem:
18x + 40y = 10(20)
x + y = 10
lets multiply the second equation by -18 and add to the first:
18x + 40y = 200
-18x -<span> 18y = -180
</span>----------------------
0 + 22y = 20
y = 20/22 = 10/11
and substitute in the original equation:
x <span>+ y = 10
</span>x = 10 - y
x = 10 - 10/11
x = 110/11 - 10/11
x = 100/11
so they have to use 100/11 liters of 18% solution and 10/11 liters of 40% solution
