Hi guys, I have math questions that are hard to solve. Can anyone help?The first question:Sarah is 20 yrs older than her sis, Sarahs bro is 12 yrs younger than sarahs sisA) write an equation for this situation and her siblings relationshipB) if her bro is 1 year old find the other variableSecond question:The total number of students in the seventhgrade is 9 more than 4 times as many studentsas are in the art class. There are 101 students inthe seventh grade. Write and solve an equationto find the number of students in the art class. Let x represent the number of students in theart class. PLS HELP

{x = -1/2 ,   y = -1

step-by-step explanation:

solve the following system:

{2 x + y = -2

{10 x - 3 y = -2

in the first equation, look to solve for y:

{2 x + y = -2

{10 x - 3 y = -2

subtract 2 x from both sides:

{y = -2 x - 2

{10 x - 3 y = -2

substitute y = -2 x - 2 into the second equation:

{y = -2 x - 2

{10 x - 3 (-2 x - 2) = -2

10 x - 3 (-2 x - 2) = (6 x + 6) + 10 x = 16 x + 6:

{y = -2 x - 2

{16 x + 6 = -2

in the second equation, look to solve for x:

{y = -2 x - 2

{16 x + 6 = -2

subtract 6 from both sides:

{y = -2 x - 2

{16 x = -8

divide both sides by 16:

{y = -2 x - 2

{x = -1/2

substitute x = -1/2 into the first equation:

{y = -1

{x = -1/2

collect results in alphabetical order:

answer:   {x = -1/2 ,   y = -1

the opening of this porabola is facing up

step-by-step explanation:

d. you cannot tell because there are no values shown.

25/6 hope it : )

step-by-step explanation: