Which of the following is a solution of 4x + 5y ≤ 20? A. (5, 7) B. (1, 1) C. (0, 5) D. (8, 0)

Question

Which of the following is a solution of 4x + 5y ≤ 20?
A. (5, 7)
B. (1, 1)
C. (0, 5)
D. (8, 0)

in progress 0
Mia 12 mins 2021-10-13T06:40:34+00:00 2 Answers 0

Answers ( )

    0
    2021-10-13T06:42:00+00:00

    For this case we must replace each of the points and verify if the inequality is met:

    Point: (5,7)

    4 (5) +5 (7) \leq20\\20 + 35 \leq20

    It is not fulfilled!

    Point: (1,1)

    4 (1) +5 (1) \leq20\\9 \leq20

    Is fulfilled!

    Point: (0,5)

    4 (0) +5 (5) \leq20\\0 + 25 \leq20

    It is not fulfilled!

    Point: (8,0)

    4 (8) +5 (0) \leq20\\32 \leq20

    It is not fulfilled!

    Answer:

    (1,1)

    0
    2021-10-13T06:42:18+00:00

    Answer:

    B.

    Step-by-step explanation:

    Plug in and see:

    Let’s try the first (x,y)=(5,7)

    4(5)+5(7) <=20

    20+35<=20 not true so not A

    Let’s try (1,1) for (x,y)

    4(1)+5(1)<=20

    4+5<=20 that is true so choice B looks good

Leave an answer

Browse
Browse

27:3+15-4x7+3-1=? ( )