Find the slope of the line through the pair of points.
(19, −16), (−7, −15)
-1/26
Simplify.
(2x4y-3)-1
y3/2x4
Find each product.
6v(2v + 3)
12v2 + 18v
Working alone, Ryan can dig a 10 ft by 10 ft hole in five hours. Castel can dig the same hole in six hours. How long would it take them if they worked together?
2.73 hours
Solve the System by Elimination.
−4x−2y=−12
4x+8y=−24
(6, −6)
Find the slope of the line through the pair of points.
(9, 3), (19, −17)
−2
Simplify.
2m2*2m3
4m5
Simplify each expression.
(5p2 − 3)+ (2p2 − 3p3)
−3p3 +7p2 −3
Working alone, Carlos can oil the lanes in a bowling alley in five hours. Jenny can oil the same lanes in nine hours. If they worked together how long would it take them?
3.21 hours
Solve using Elimination.
8x + y = −16
−3x + y = −5
(−1, −8)
Write the Slope-intercept form of each line.
9x−7y=−7
y=9/7x+1
Using the Law of Exponents, when the bases are the same what must you do to the Exponents?
Multiply Them.
Simplify each expression.
(4+2n3)+(5n3 +2)
7n3 +6
Krystal can wax a floor in 16 minutes. One day her friend Perry helped her and it only took 5.76 minutes. How long would it take Perry to do it alone?
9 minutes
Solve by substitution.
2x+y=20
6x−5y=12
(7, 6)
Find a Point-Slope equation for a line containing the given point and having the given slope.
(4, -3), m = -1
y + 3 = -1(x – 4)
Simplify the exponents.
(4z*3z2)3
1728z9
Find the product.
(−y − 3x)(−y + 3x)
y2 − 9x2
Flying to Kampala with a tailwind a plane averaged 158 km/h. On the return trip the plane only averaged 112 km/h while flying back into the same wind. Find the speed of the wind and the speed of the plane in still air.
Plane: 135 km/h, Wind: 23 km/h
Solve by using Subsitiuion
y= 5x−7
−3x − 2y = −12
(2, 3)
Find a Point-Slope equation for a line containing the given point and having the given slope.
(3, 5), m = -2
y – 5 = -2(x – 3)
Simifply.
(9k4/5k)2
81k6/25
Factor each completely.
3p2−2p−5
(3p − 5)(p + 1)
A boat traveled 210 miles downstream and back. The trip downstream took 10 hours. The trip back took 70 hours. What is the speed of the boat in still water? What is the speed of the current?
boat: 12 mph, current: 9 mph
Solve using Elimination.
−2x−9y=−25
−4x−9y=−23
(−1, 3)