Question

Evaluate the following expression using the values given:

Find 2r2 + 3s3 - r2 + 4t2 - r2 if r = -2, s = -3, and t = 5.

-19

-37

27

19

Answer 1

@kewlgeek555 @helpmeplzzzzz!

Answer 2

does 2r2 = \[2r^{2}\] ?

Answer 3

Your question is even easier thank your username.. :P

Answer 4

Yes, sorry
it is Evaluate the following expression using the values given:

Find 2r^2 + 3s^3 - r^2 + 4t^2 - r^2 if r = -2, s = -3, and t = 5.

-19

-37

27

19

Answer 5

2*4 + 3* (-27) + 4*25 -4 = 8-81+100 -4 = 23

Answer 6

Thanks @Allofus

Answer 7

But that isn't an option

Answer 8

Hmm.

Answer 9

I know the answer isn't 27 either

Answer 10

HELP PEOPLES

Answer 11

@texaschic101

Answer 12

@waterineyes @helpmeplzzzzz! @Hotchellerae21

Answer 13

@tkhunny

Answer 14

Paying attention is the hard part.

2r^2 + 3s^3 - r^2 + 4t^2 - r^2

r = -2

2(-2)^2 + 3s^3 - (-2)^2 + 4t^2 - (-2)^2
2*4 + 3s^3 - 4 + 4t^2 - 4
8 + 3s^3 + 4t^2 - 8
3s^3 + 4t^2

s = -3

3(-3)^3 + 4t^2
3*(-27) + 4t^2
-81 + 4t^2

t = 5

-81 + 4(5)^2
-81 + 4*25
-81 + 100
19

Keep in mind that -2^2 and (-2)^2 are unlikely to be the same in written notation. They may be in programming languages.

Answer 15

2(-2)^2+3(-3)^3-(-2)^2+4(5)^2-(-2)^2
=2(4)+3(-27)-(4)+4(25)-(4)
=8-81-4+100-4
=-73-4+100-4
=-77+100-4
=23-4
=19
Answer: 19

Answer 16

\[2 r^2-r^2-r^2+3 s^3+4 t^2=3 s^3+4 t^2 \]\[3 (-3)^3+4\ 5^2=19 \]