If you cross multiply the two fractions, you get 65/7, which is 9.3 rounded to the nearest tenth.
It’s not that hard you just need to draw it.
<span>Tom:
time to </span>build a fence<span>= 4 hours; rate =1/4 job/hr.
tom &jack
</span>time to build a fence <span>= 3 hrs.; rate = 1/3 job/hr
</span><span>Jack :
time to </span>build a fence= x hrs ; rate = 1/x job/hr
<span>1/4 + 1/x = 1/3
3x + 12 = 4x
x=12 hrs. (Time for jack to build a fence )</span>
Answer:
4.181
Step-by-step explanation:
1/3 (3.2×1.4) 2.8
1/3 ( 4.48) 2.8
1/3 (4.48 × 2.8)
1/3 × 12.544
= 4.181
