See the Answer

• Area of Rectangle = Length x Breadth

• Additive Inverse means what should be added to the asked number so that the sum becomes zero.
• Therefore, the general equation is (asked number) + (inverse) = 0
• Put the values in the above equation, we get, -8 + inverse = 0
• Hence, inverse = +8

Ans There are 4 50Rs. notes and 5 10 Rs. notes.

Explanation: Let, the no. of  50 Rs. notes be x.   So, no. of 10 Rs. notes = (x+1).

Thus the total amount = Rs. [50x + 10(x+1)] = Rs. (60x + 10)

By the prob, 60 x + 10 = 240 

Solving, we get, x = 4 . So, x+1 = 5

Ans. The Sum of money is Rs. 5650

Explanation: Here, we see, interest in (6-4) = 2 years = Rs. (8362 - 7458) = Rs. 904.

So, interest in 4 years = Rs. 904 x 2 = Rs. 1808.

Hence, the sum of money = Amount in 4 years - Interest in 4 years = Rs. (7458 - 1808) = Rs. 5650.

INITIAL CONCENTRATION = 125 LITRES

REPLACED CONCENTRATION = 25 LITRES

 FINAL CONCENTRATION = INITIAL (1- REPLACED/INITIAL)^3                  [AS THIS METHOD WAS DONE FOR 3 TIMES]

                                            = 125 ( 1 - 25/125)^3

                                           = 125 ( 100/125)^3

                           ON SOLVING THIS YOU WILL GET   64 LITRES......WHICH IS MILK 

       AND REMAINING   61 LITRES WILL BE WATER . 

Hello, Anu! Please check the image for the solution. Hope it helps :)     

We can change -ve sign in linear inequation by changing the sign of inequation.

Answer:   An equation should have  one LHS and one RHS with an equal sign between them.

If the eqauality sign doesnt exist, then it is not an equation ,but only an expression.An expression could only be simplified and cannot be solved as there is nothing to solve. The present question is only an expression and so cannot be solved.The students should clearly understand the difference between expression and equation.

Ans: 35 km/hr. Check attachment