4 x plus 8 y equals 40, when y equals 0.8?

When x = 8.4 and y = .8 then 4x + 8y = 40

Step-by-step explanation:

4x + 8y = 40

y = .8

Let's solve for x by substituting .8 for y (since y is given)

4x + 8(.8) = 40

4x + 6.4 = 40   Subtract 6.4 from both sides.

4x + 6.4 - 6.4 = 40 - 6.4

4x = 33.6  Divide each side by 4

4x/4 = 33.6/4   4 cancels on the left because 4/4 = 1

x = 33.6/4

x = 8.4

So when x = 8.4 and y = .8 then 4x + 8y = 40

  y= -3x is the required function.

step-by-step explanation:

we have been given a table:

x             y

0             0

1             -3

3             -9

-2             6

we can see that the values of y is -3 times the value of x

hence, the function would be: y= -3x.

put the values of x will give the same y as in the table that means function is satisfying the given table.

the answer would be d

straight away you can eliminate a and c because not all books contain a scientific skill because some may be fiction. c is also wrong because it saids that the only way children can learn is through books which is incorrect.

b is also wrong because reading can be a scientific skill but not always, therefore it is wrong which leaves you with d, the correct answer since it said that it can children learn.

hope this ! : 3