MATH SOLVE

2 months ago

Q:
# Please help!!!If y=4 when x=-2. Find x when y=-5If y=20 when x=-5. Find x when y=-1

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Answer:Step-by-step explanation:1)If y=4 when x=-2. Find x when y=-5This is assumed to be a direct proportion. It means that x is directly proportional to y. To make x to be equal to y, that is, removing the "proportionality" sign and replacing it with the "equal to" sign, we will introduce a proportionality constant, k. Therefore,x = ky - - - - - - - 1Therefore, we would find the value of k. From the information given, y=4 when x= -2. Therefore, we will substitute y= 4 and x = -2 in equation 1-2 = 4kk = -2/4 = -1/2x = -1/2 Γ y = -y/2 - - - - - - - -2We want to find x when y=-5Substituting y= -5 in equation 2,x = - -5/2 = 15/22) If y=20 when x=-5. Find x when y= -1We would follow same procedure above.x = ky - - - - - - - 1Therefore, we would find the value of k. From the information given, y=20 when x=-5. Therefore, we will substitute y= 20 and x = -5 in equation 1-5 = 20kk = -5/20= -1/4x = -1/4 Γ y = -y/4 - - - - - - - -2We want to find x when y=-5Substituting y= -5 in equation 2,x = - -5/4 = 5/4