The answer is D: She will have completed 1/2 of this race because she runs 1 km/ 4 minutes and 20/4=5. so, 1*5=5 and 5/10 is 1/2.
2a^3-4a^2+5a+3
Explanation:
For standard form you always start with the one that has the biggest exponent to the least one
Multply across the fraction so
1/2 * 3/4= (1*3)/(2*4)=3\8
Answer:
Brother is 70.5 and sister is 64.5
Step-by-step explanation:
you will need to set up a simple equation and give out variables.
Girls age = 6-x
Brother's age= x
the you will take those 2 and add them and place them equal to 135:
6-x+x=135
6-2x+6=135+6
The 6 cancels out
2x=141
2x/2=141/2
x=70.5
The brother's age would be 70.5 then and the girl's would be 64.5
