Question

Evaluate the expression below at x = 5.
5(3x^ - 8x)
2
335
350
175
925

Answer 1

Need help?

Answer 2

is it suppose to look this way? (3x^2 - 8x)

Answer 3

oh it is

Answer 4

First since x =5 then you look for x in the equation and replace it with (5)

Answer 5

So It should look like this now 5(3(5)^2 - 8(5))

Answer 6

yep thx

Answer 7

So now you remove the parenthesis from the 5's

Answer 8

yep

Answer 9

so you multiply 5 times 8 which is?

Answer 10

40

Answer 11

correct so now it looks like this 5(3 (multiply sign) 5^2 - 40)

Answer 12

30-40?????

Answer 13

At the moment the 40 is negative

Answer 14

Then we raise the other 5 to the power of 2 which is?

Answer 15

10

Answer 16

remember its not 5 times 2 it's 5 times 5

Answer 17

oh25

Answer 18

Correct ^_^ Ok now we should see it like this 5(3 . 25 -40) WE are almost done

Answer 19

Now we multiply 3 . 25 which is?

Answer 20

75

Answer 21

Correct so now it looks like 5(-40 + 75)

Answer 22

Ok so now we need to add/subtract but in this case its add since its the first one and the subtract sign is to mean negative 40 so add -40 +75 which gives you?

Answer 23

35

Answer 24

good so since the addition step was in parenthesis it would look like this now 5(35)

Answer 25

175 so c

Answer 26

so we remove parenthesis which is 5 . 35 (btw the period means multiply)

Answer 27

Correct ^_^ great job bro

Answer 28

5 . 35 = 175 and thats your answer ^_^

Answer 29

thx

Answer 30

no prob any time