PLS HELP WILL GIVE BRAINLIEST


The sum of two numbers is 85. The second number is 4 more than 2 times the first number. Let x represent the first number and let y represent the second number. What are the two numbers? Use the table to guess and check.


19 and 65
25 and 60
27 and 58
32 and 53

PLS HELP WILL GIVE BRAINLIESTThe sum of two numbers is 85 The second number is 4 more than 2 times the first number Let x represent the first number and let y r class=

Respuesta :

The guts of the table are ...

[tex] \left[\begin{array}{cccc}x&y&x+y=85&y=2x+4\\19&65&\text{false}&\text{false}\\25&60&\text{true}&\text{false}\\27&58&\text{true}&\text{true}\\32&53&\text{true}&\text{false}\end{array}\right] [/tex]

Of course, you know the answer after figuring the third line of the table.

The two numbers are 27 and 58.

_____

If the second number is odd, the result after subtracting 4 will not be divisible by 2. This lets you reject the 1st and 4th choices immediately. As for the second choice, twice 25 is 10 less than 60, not 4 less, so that choice can also be discarded.

Starting from the system of equations

[tex]x+y=85\\y=2x+4[/tex]

you can use substitution to get

[tex]x+(2x+4)=85\\\\3x=81\qquad\text{subtract 4}\\\\x=27\qquad\text{divide by 3}[/tex]

This identifies the 3rd selection as the appropriate one.

Answer:

C

Step-by-step explanation:

Took test on edge