Answer:
3
Step-by-step explanation:
first you add 10+2 then subtract 5 from the 12. then you multiply 6 and 2 that equals 12. now you minus 8 and 4 that equals 4. now you divide 12 and 4. that equals 3.
X in litres is 67% herbicide
y in litres is 46% herbicide
{x+y=42
{0.67x+0.46y=42*0.55
{67x+46y=2310
{46x+46y=1932
21x=378
x=18 litres
A. She need to use 18L
Answer:
76° is the other one
Step-by-step explanation:
nope, no precise calculation here. the option are thankfully enough apart that solving it graphically is just fine. look at the screenshot. the upper intersection is the one with the 7° angle
the lower one is somewhat less than 90° :P