Answer:
Step-by-step explanation:
In general, remember that the converse of
is
, therefore in this case 
so
Answer:
The solution is given below:
Step-by-step explanation:

As we know the value of k and r so the equation will be





You need to start calculating from the innermost bracket and if there are no signs to do any operation then you need to multiply
Answer:
b = 29
Step-by-step explanation:
C x D = A x B
15(11x - 91) = 7(2x + 10)
165x - 1365 = 14x + 70
add 1365 to both sides of the equation:
165x = 14x + 1435
subtract 14x from both sides:
151x = 1435
divide both sides by 151:
x = 9.5
b = 2(9.5) + 10 = 29
She made an error in the STEP 1
she shouldnt multiply the numbers