What value of c makes the statement true?
-2x3(cx3 + x2) = -10x6 - 2x5

c =

it is 5 i just did it

Step-by-step explanation:

next question

What value of t makes the statement true?

(4x3 + 5)(2x3 + 3) = 8x6 + tx3 + 15

t = 22

next question

What value of k makes the statement true?

xky4(2x3 + 7x2y4) = 2x4y4 + 7x3y8

k = 1

option 1 is correct.

step-by-step explanation:

y varies inversely with x and constant of variation is 4

the equation will be:

y = k/x

where k =4 so,

y = 4/x

if we put values of x of option 1 in the above equation and find values of y

y = 4/-2 => y =-2

y = 4/-1 => y = -4

y = 4/1 => y = 4

y = 4/2 => y =2

so, all the values of x and y are correct.

if we put values of x given in other options and find value of y we cannot find whole table satisfying the equation.

hence option 1 is correct.