y=-18x+17. Since this is already in Slope-Intercept form, we can determine that the slope is negative 18.
18x= 19818x/18 = 198/18x = 11
18x + 12y = 72 to get x-int. put y=0 18x + (12)(0) = 72 18x = 72 x = 4 your x-intercept is 4. this is the place where the line goes through the x-axis.
10x + y = 67 ( y=17) what does x equal?
10x + 17 = 4x - 16x = -18x = -3
If you mean: y = -18x+17 then the slope is -18 and the y intercept is 17
y=-18x+17. Since this is already in Slope-Intercept form, we can determine that the slope is negative 18.
18x= 19818x/18 = 198/18x = 11
72xy
sweet 17 bsa 6x-18x
It is set for substitution. -3X - 3Y = 3 Y = 5X - 17 ( you have Y given to you, so substitute ) -3X -3(5X - 17) = 3 distribute -3X - 15X + 51 = 3 -18X + 51 = 3 -18X = -48 X = -8/3 Now substitute back into first equation for Y -3(-8/3) - 3Y = 3 8 - 3Y = 3 -3Y = -5 Y = 5/3 You preform the check ( it checks in first equation )
y = 2 (4X2=8) +9 = 17
x+y=17 xy=6 x=6/y 6/y+y=17 6/y+y2/y=17 (6+y2)/y=17 y2-17y+6=0 Using quadratic equation: y = (17 +- sqrt(265))/2 x = 17-y
798 advance tickets and 1357 regular tickets were sold. Say x is the number of advance tickets and y is the number of regular tickets. So x + y = 2155 since 2155 is the number of tickets sold with x and y . We also know that 18x +34y = 60502 since x the advance tickets are $18 and y the regular tickets are $34 and the total proceeds are $60502. Alright now we can solve for either x or y. Let's solve for y. How do we do that? We get rid of x from the formula. So look at this. 18x = 60502 - 34y (just a modification of the second formula), x = 2155 - y (just a modification of the first formula) and then multiply that whole thing by 18 so 18x= 18(2155) - 18y which is 18x = 38790 - 18y. So we know 18x = 60502 - 34y and 18x = 38790 -18y so since 18x = 18x, 60502 - 34y = 38790 - 18y. Now we want the y all on the same side so let's add 34y to both sides and you get 60502 = 38790 + 16y. Then subtract 38790 from both sides and you get 60502 - 38790 = 16y which is 21712 = 16y which divided by 16 is 1357 = y. That's your number of regular tickets. Now then x + y = 2155 or x = 2155 - y so x = 2155 - 1357 = 798. So x is 798 and y is 1357. You can even plug it back into the problem and it works. 18x + 34y = 60502 which is 14364 + 46138 = 60502 and thankfully 14364 + 46138 does equal 60502.
BSA Sweet 17 6x-18x
18x + 12y = 72 to get x-int. put y=0 18x + (12)(0) = 72 18x = 72 x = 4 your x-intercept is 4. this is the place where the line goes through the x-axis.
10x + y = 67 ( y=17) what does x equal?