Question

2. solve this
Assignment Details:-
1. Solve: 11 + (-1)
2. Solve: 13-[(-2) + 1]
3. Solve: 0 + (-10)
4. Solve: 18 + (-3)
5. Solve: [(-7) + 4)] = [(-2) + 1]
7. Solve: (-8)+(-9)
7. A certain freezing process requires that room temperature be lowered from 30°C at the rate of
5°C every hour. What will be the room temperature 5 hours after the process begins?
8. Solve: 26 X (-48) + (-48) * (-36)
9. Fill in the blanks: (-31)-((-30) + (-1)] =
10. An elevator descends into a mine shaft at the rate of 5 m/min. If the descent starts from 50 m
above the ground level, how long will it take to reach - 150 m.
11. Solve: - a) 7x b) x 7 c) x 6
d) 10x
e) 6x
1) 8x +
10
10
12. Find 20% of Rs. 2500
13. If 75% of x is 18 then find the value of x
14. What Principal will amount Rs. 900 in 6 years at 10% simple interest?​

Answer 1

Answer:

7). 5°C

8). 480

12). ₹500

13). x= 24

Step-by-step explanation:

7). Initial Temperature = 30°C

Rate of change in temperature = 5°C/hour

Time = 5 hours

So, in 5 hours the temperature would be decreased by 5*5 = 25°C.

So, Final Temperature = 30 - 25 = 5°C

8).26×(−48)+(−48)×(−36)=(−48)[26+(−36)] {using distributive property}

= (−48)×[26−36]

=(−48)×(−10)

=480

12). 20% percent of Rs. 2500= 100/20

×2500

=20×25

=Rs.500

13). 75% of x = 18

x= 18× 100/75

= 4× 18/3

= 4× 6

= 24