Please Be Very Careful and Check for Typos !
Please be very careful and check for typos‼!
1) Solve by the elimination method?
4x + 5y = 1
8x + 10y = 2
What is the solution of the system? Type an ordered pair. Type an integer or a fraction. Type N if there is no solution. Type I if there are infinitely many solutions.
Infinitely many
2) Determine the slope of the line (0, 6) (-3, 0)
M = 2
3) Solve using the multiplication principle. Don’t forget to perform a check.
11x = -99
x = -9
4) Graph the system of inequalities:
y > -5
x > 6
I think there should be ≥ signs…
5) Solve:
-13 < x -2 < -1 - The solution is { x | -11 < x < 1 } --- BUT I THINK THERE SHOULD HAVE BEEN FRACTIONS… if it was x/4, then divide by 4 in the answer, etc.
6) Graph the operation using the slope and the y-intercept.
y = 6 x + 5
5
7) Translate to an algebraic expression.
The product of 33% and some number. The translation is 0.33n
(Type the percentage as a decimal. Use n to represent some number.
8) In 1991, the life expectancy of males in a certain country was 61.7 years. In 1998, it was 65.4 years. Let E represent the life expectancy in year t and let t represent the number of years since 1991. The linear function E(t) that fits the data is: E(t) = 0.5 t + 61.7 (Round to the nearest 10) Use the function to predict the life expectancy of males in 2003. E(12) = 67.7 Round to the nearest 10th.
9) Find the slope, if it exists: x - -5
&n bsp; m = N (undefined)
11) The Function H described by H(x) = 2.75x + 71.48 can be used to predict height, in centimeters, of a woman whose humerus (the bone between the elbow and the shoulder) is x cm long. Predict the height of a woman whose humerous is 36 cm long. The predicted height is 170.48
12) Solve:
5 x + 1 x = 9 + x
4 8 8
The solutions is x = 3
13) Simplify.
7[96 – (90 – 68)]
7 [96 – (90-68)] = 518
16) Graph the equation y = 8
17) Solve the system of equations by graphing then classify the system as consistent or inconsistent and as dependent or independent.
9x - 9y = -27
9 y - 9x= 27
- a) What is the solution of the system of equations?
Infinitely many solutions
Consistent dependent
18) On three consecutive passes, a football team gains 9 yards, loses 39 yards, and gains 29 yards. What number represents the total net yardage -1
19) Graph the equation and identify the y-intercept. y + x = -10. The y intercept is (0, -10) (Type an ordered pair.)
20) Solve: 0.8x + 6 < 1.2 x -1. The solution set is {x | x ≥ 17.5 } simplify answer, type an inequality symbol then type an integer or a decimal.
22) (1, 5) (8, 2) (8, 4) Is this the graph of a function?
YES
23) Solve using the multiplication principle. Don't forget to perform a check:
-5 x = -9
8 10 The solution is 36/25 (Simplify your answer. Type an integer or a fraction.
26) Graph the line containing the given pair of points and find the slope.
(4,6), (-1, -5) Find the slope of the line m = 11/5
27) Multiply: 8 .(9) = 72/35 (Type an integer or a simplified fraction)
5 7
28) Solve the following system of equations
x + 6y = 8 (1)
x = 4 = 6y (2)
NO solution
29) Collect like terms. 13u + 7v - 7u - 9v = 6u-2v
30) Solve then graph: y - y > -13. solution is : { y| y > ___}
You didn’t type this one correctly.
But you can read the number from the middle of all the graphs…
And it looks like this:
(------
With a paren and it goes to the right
31) Describe whether the point of line is parallel, perpendicular, or neither
2x + 5y = 2
5x + 2y = 10
Neither
32) Solve 7 > - 5x + 6 or 9 < - 3x + 2
The answer is the multiple choice option with the U and two separate terms.
33) Find the domain of the function g(x) = 1
8.5x
You didn’t type this properly… but the answer is the one like this:
{x | x ≠ fractional answer}
34) Trains A and B are traveling I the same direction on parallel tracks. Train A is traveling at 80 mph and Train B is traveling at 100 mph. Train A passes a station at 10:25 a.m. If Train B passes the same station at 10:37, at what time will Train B catch up to Train A? 11:25 AM.
35) Find the indicated outputs for f(x) = 3x2 - 2x
f(o) = 0
f(-1) = 5
f (2) = 8
36) Find the slope if it exists, of the line containing the pair of points. (5.9) and
(6, -9). The slope m = -18 (Simplify, type an integer or fraction if N is undefined.)
38) Soybean meal is 16% protein, cornmeal is 8% protein. How many pounds of each should be mixed together in order to get 320lb mixture that is 9% protein?
How many pounds of cornmeal in the mix 280
How many pounds of soybean meal in the mix 40
39) Determine whether (-4, -8) is a solution set of
5x - 6y = 18
NO
40) Solve by the substitution method. 8x + 3y = -10
+16 =9y
What is the solution of the system? Type an ordered pair, type N if no solution.
You were missing something in the second equation…
41) Solve, then graph 4x > 8
x≥ 2
0 1 2 3 4 5
[------
*-----
42) Solve -0.2x < -4 The solution set is { x | x > 20 }
43) Use the distributive property to help you solve the equation
4 (w-3) = -12 w = 0
44) Graph the inequality on a plane
5x + 6y < 30
45) Evaluate
x + y for x = 51 and y = 5
7
= 8