Answer:
x/8 -1
Step-by-step explanation:
Answer:
the last option bc 90÷2 is 45 so, we consider as *special*
Answer:
true
Step-by-step explanation:
0.8 is out of 1.0 so 0.8 + 0.2 = 1.0 and same for 8/10
Answer:
C) 2BC = XY
Step-by-step explanation:
A) ZX || XY
No, sides of the triangle, not same size
B) BC || AB
No, sides of triangle
C) 2BC = XY
Yes, as BC║XY and YA= AX
D) YZ = AC
No, YZ║AC but is twice a length
Answer:
11 L of 20% juice and 4 L of 5% juice
Step-by-step explanation:
Let
x L = amount of 20% juice
y L = amount of 5% juice
<u>20% juice:</u>
Amount = x L
Amount of juice
L
<u>5% juice:</u>
Amount = y L
Amount of juice
L
<u>16% juice:</u>
Amount = 15 L
Amount of juice
L
We mixed x L of 20% juice with y L of 5% juice to get 15 L of 16% juice, so
![x+y=15](https://tex.z-dn.net/?f=x%2By%3D15)
and
![0.2x+0.05y=2.4](https://tex.z-dn.net/?f=0.2x%2B0.05y%3D2.4)
From the first equation:
![x=15-y](https://tex.z-dn.net/?f=x%3D15-y)
Substitute it into the second equation:
![0.2(15-y)+0.05y=2.4\\ \\20(15-y)+5y=240\\ \\300-20y+5y=240\\ \\-20y+5y=240-300\\ \\-15y=-60\\ \\15y=60\\ \\y=4\ L\\ \\x=15-4=11\ L](https://tex.z-dn.net/?f=0.2%2815-y%29%2B0.05y%3D2.4%5C%5C%20%5C%5C20%2815-y%29%2B5y%3D240%5C%5C%20%5C%5C300-20y%2B5y%3D240%5C%5C%20%5C%5C-20y%2B5y%3D240-300%5C%5C%20%5C%5C-15y%3D-60%5C%5C%20%5C%5C15y%3D60%5C%5C%20%5C%5Cy%3D4%5C%20L%5C%5C%20%5C%5Cx%3D15-4%3D11%5C%20L)