Answer:
30 hrs
Step-by-step explanation:
In 1 hour, J completes 1/55 of job
In that time, D completes 1/66 of job
J + D together complete 1/55 + 1/66 of the job in 1 hour
1/55 + 1/66 = 1/30
Together, it takes them 30 hours to build the wall.
Step-by-step explanation:
Each interior angle=140°
(n-2)180°/n=140°
180°n-360°/n=140°
180°n-360°=140°n
180°-140°=360°
40°n=360°
n=360°/40°
n=9
Hence, the number of sides of the polygon is 9.
It is nonagon .
Answer: 6
Step-by-step explanation: 0.6 is a decimal and not a whole number. But 6 is a whole number. So we can conclude that 6 is greater than 0.6
10s
Every digit on the left of a place is 10 times bigger than the place on the right.
Part 1
Answer: -9
---------------------------
Explanation:
Let's focus on evaluating first. We need to look at the table and locate f(x) = 13. So we're looking in the f(x) row where 13 shows up. That's in the second to last column. Right above that we have x = 5
This means f(5) = 13 and The inverse undoes the f(x) function. So the input x and output y values swap places. This is why we're reading the table in reverse.
<em>We can replace all of </em>
<em> </em>
<em> with 5 to go from </em>
<em> to </em>
<em> </em>
<em>Then we repeat the process of using the table. Locate 5 in the f(x) row. This is in the last column. The value above that is x = -9.</em>
<em>So f(-9) = 5 and </em>
<em>Overall, </em>
===============================================
Part 2
Answer: -13
---------------------------
Explanation:
Same idea as before. Locate 8 in the f(x) row. The value above this is x = -13
<em>This means f(-13) = 8 and </em>