Solving for a Variable
Solve for y.
5x + 3y = 15
y = -5/3 x + 5
3/4 x = 60
x = 80
Find the point of intersection.
y = 5x+1
y= -3x - 15
(-2, -9)
Google Slide 1
(1, -3)
What is the second planet from the sun?
Venus
Solve for x.
5x + 3y = 15
y = -3/5 y + 3
− 8/3 m = 6
m = 66 2/3
Find the point of intersection.
y = x-6
y = 12- x
(9, 3)
Google Slide 2
(3, -1)
How many great lakes are there?
5
Solve for a.
b - 2a = c
a = (b+c)/2
(3x+1)/2 = 5
x = 3
y = 3x - 5
y = 2x + 14
(19, 52)
Google Slide 3
(1, 2)
What is the population of Rootstown?
*Closest estimate gets points*
8,232
Solve for p.
6 - 2(q - 3p) = 4p
p = q - 3
1/3 x + 1/4 x = 4
x = 48/7
Larry and his sister, Betty, are saving money to buy their own laptop computers. Larry has $215 and can save $35 each week. Betty has $380 and can save $20 each week. When will Larry and Betty have the same amount of money?
11 weeks
Google Slide 4
(-2, 1)
How long has Ms. Lindsey been teaching at Rootstown?
3 years
Solve for r.
4(r - 3s) = r - 5s
r = 7/3 s
x/2 + (x-3)/5 = 3
x = 36/7
Ginny is raising pumpkins to enter a contest to see who can grow the heaviest pumpkin. Her best pumpkin weighs 22 pounds and is growing at the rate of 2.5 pounds per week. Martha planted her pumpkins late. Her best pumpkin weighs 10 pounds but she expects it to grow 4 pounds per week. Assuming that their pumpkins grow at these rates, in how many weeks will their pumpkins weigh the same?
How much will they weigh?
If the contest ends in seven weeks, who will have the heavier pumpkin at that time?
8 weeks
42 pounds
Ginny will have the heavier pumpkin
Google Slide 5
No Solution
What’s more: the number of feet in a mile, or the number of pounds in two tons?
Feet in a mile!
5,280 vs 4,000