What is (542)+43×89+21

Answer is 4390

Step-by-step explanation:

Apply BODMAS to the above question

First step- open bracket to get=

542+43×89+21

Then multiply=

542+3827+21

Then add the numbers =

4390

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3

b.an increase in a causes b to decrease