Question

Which expressions are equal to 4 when x = 7 and y = 2?

Choose all answers that are correct.

A.
x – y – 1

B.
x – (6 ÷ y)

C.
xy – 8

D.
x + y – 4

Answer 1

@BritBratt13

Answer 2

substitute

Answer 3

\[x-y-1= 7-2-1=4\]
\[x-(6/y)=7-3=4\]
\[xy-8=14-8=6\]
\[x+y-4=7+2-4=5\]

Answer 4

plug in 7 for x, and 2 for y, and find out.

\(\normalsize\color{blue}{ x-y-1~~~~~⇒ ~~~~~\color{red}{7}-\color{darkgoldenrod}{2} -1}\)

\(\normalsize\color{blue}{ x-(6\div y)~~~~~⇒ ~~~~~\color{red}{7}-(6\div \color{darkgoldenrod}{2} )}\)

\(\normalsize\color{blue}{ xy-8~~~~~⇒ ~~~~~\color{red}{7}\times \color{darkgoldenrod}{2} -8}\)

\(\normalsize\color{blue}{ x+y-4~~~~~⇒ ~~~~~\color{red}{7}+ \color{darkgoldenrod}{2} -4}\)

Answer 5

btw it is called "for all that applies" (or something like this)...

Answer 6

4
4
6
5
these are the numbers i got

Answer 7

Yes.

And you have to have the one(s) that is equal to 4.
Which one(s) is it ?

Answer 8

yes, the first 2, A and B .

Answer 9

@kira1502 thats right.
@SolomonZelman has answered :)

Answer 10

ok thanks so much

Answer 11

i would medal you both but i can't :/

Answer 12

Just the fact that I have answered doesn't guarantee anything. You are having a false impression because of my purple title :)

Answer 13

medal Mokeira, I have over 5K of medals.

Answer 14

ok :)

Answer 15

Over 6K :)

Answer 16

have fun !

Answer 17

ty :)