Ydecreased by 23 is 52.9a. 52.9-23=y; y=29.9b. y-52.9=23; y=75.9c. y-23=52.9; y=75.9d. 52.9-y=23; y=29.9

C. y -23 = 52.9; y = 75.9

Step-by-step explanation:

y decreased by 23 is 52.9     Convert to a mathematical equation

y – 23 = 52.9                           Add 23 to each side

      y = 75.9

Check:

75.9 – 23 = 52.9

        52.9 = 52.9

answer: standard form is ax^2 + bx + c = 0

step-by-step explanation:

standard form is ax^2 + bx + c = 0

(2x + 1)(x - 2) = 0

distribute to get into standard form

2x^2 - 4x + x - 2 = 0

2x^2 - 3x - 2 = 0

a = 2, b= -3, c = -2

a is your answer

ok

step-by-step explanation: