Solve the system below by interpreting it as the matrix equation AX=B and finding the inverse coefficient matrix.
x−7y+5z−3x+25y−18zx+6y−5z=90=−319=−71 Calculate A−1.
□
Calculate A−1B.
□
What is x ?
\begin{tabular}{|c|c|}
\hline & 5524 \\
\hline \multicolumn{2}{|l|}{5524 ( 5} \\
\hline (3) Not equivalent. & \\
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\end{tabular}
choose the letter that best answers the question or completes the statement. 1. Motion is described with respect to a
b. displacement.
c. slope.
d. frame of reference. 2. Displacement is distance combined with
a. direction.
b. speed.
c. velocity.
d. magnitude. 3. Displacement vectors of 3 m and 5 m in the same direction combine to make a displacement vector that is
a. 2 m .
b. 0 m .
c. 8 m .
d. 15 m . 4. Average speed is the total distance divided by the
a. average distance.
b. average acceleration.
c. total time.
d. slope. 5. The slope of a distance-time graph is equal to the
a. speed.
b. acceleration.
c. displacement.
d. motion. 6. Velocity is 10. The rate at which velocity is changing at a given instant is described by
(4)Text)
assessment at PHSchool.com
me
a. instantaneous acceleration.
b. average speed.
c. constant speed.
d. vector addition. Understanding Concepts 11. Why is it necessary to choose a single frame reference when measuring motion? 12. For what kinds of distances would you choos make measurements in millimeters? In kilom 13. Light from a star travels to Earth in a straig line at a constant speed of almost 300,000 What is the acceleration of the light? 14. If two displacement vectors add to yield displacement of zero, what do you know the two displacements? 15. How will the total distance traveled by in 2 hours be affected if the average sp is doubled? 16. How do you know that a speedomete you the instantaneous speed of a car? 17. On a distance-time graph, what wou curve describing constant speed look 18. A spider is crawling on a wall. First it 1 meter up, then 1 meter to the left 1 meter down. What is its total disp 19. A jogger travels 8.0 kilometers in 1 What is the jogger's average spees 20. You see a lightning bolt in the sky clap of thunder 3 seconds later. travels at a speed of 330m/s.Hc was the lightning? (Hint: Assum lightning instantly.) 7. Two or more velocities can be combined by
a. graphing the slope.
b. using vector addition.
c. calculating the instantaneous speed.
d. determining the rate. 8. A ball just dropped is an example of
a. constant speed.
b. instantaneous speed.
c. combining displacements.
d. free fall. 9. Acceleration is equal to
a. distance divided by time.
b. change in speed divided by time.
c. the slope of a distance-time graph.
d. change in speed multiplied by time.
Bookwork code: 4H
Calculator
not allowed In the pyramid, the number in the top brick is the sum of the numbers in the bottom two bricks. What number should replace x ?
18. The height of a pool increases by 4 cm for every 10 litres of water added. After adding some water the height of the pool increased by 0.24 m .
18a. How many groups of 4 cm are there in 0.24 m ?
Sets of 4cm=6 18b How much water was added to the pool?
Amount of water =
Enter your next step here
□ litres
Part 1 of 2 Find all complex zeros of the given polynomial function, and write the polynomial in completely factored form.
f(x)=3x3+5x2−39x−65 Find the complex zeros of f . Repeat any zeros if their multiplicity is greater than 1.
x=□
(Simplify your answer. Use a comma to separate answers as needed. Express complex numbers in terms of i. Type an exact answer, using radicals as needed. Use integers or fractions for any numbers in the expression.)
4) Tina rode her bike 7 miles in 35 minutes. At this rate, how far will Tina trand after rilingher bike for one hour? who rode their bike the fastest. Anthing or Tina?
5) A tendier has 45 books on a shelf. Gf the bwoks, What percentage is about
Whole Numbers
Progress: The movement of the progress bar may be uneven because questions can be worth more or less (including zero) depending on your answer.
Micah is twice as old as Richard. Richard is three times as old as Ken. Ken is six years old. How old is Micah?
11 years old
8 years old
36 years old
18 years old
Progress: The movement of the progress bar may be uneven because questions can be worth more or less (including zero) depending on your answer.
How could you correctly rewrite the equation 4(5+3)=2(22−6) using the distributive property?
20+18=44−620+12=44−1212+20=−12+4420+3=44−6
A class of 204 students went on a field trip. They took 9 vehicles, some cars and some buses. Find the number of cars and the number of buses they took if each car holds 4 students and each bus hold 60 students.
Factor the expression 4z2+24z−28. Simplify your answer as much as possible, and put the greatest common factor in the first answer box.
□(□)(□ ) help (formulas)
yson wants to solve the inequality 31m<−21. How can he isolate the variable?
Multiply both sides by 3 and reverse the inequality symbol.
Multiply both sides by 3 and do not reverse the inequality symbol.
Divide both sides by -21 and reverse the inequality symbol.
Divide both sides by -21 and do not reverse the inequality symbol.
Solve the system of equations by the addition method.
{3x+2y=39x+6y=0 Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
A. The solution is □□ ISimplify your answer Type an ordered pair.)
B. There are infinitely many solutions.
C. There is no solution.
ations Two graphs are shown below. The f(x) graph is the original graph. Complete the statements below to describe the relationship between the functions f(x) and g(x). The graph of g(x) is a
[ Select ] of the
graph of f(x). Since f(x) ends at (2,6) and g(x) ends at (4,6) we can see that the
[ Select ] have
been multiplied by
[ Select ]
We
might also notice that f(−1)=
[ Select ]
which
Which is the equation for the values in the table? 8.51
\begin{tabular}{|c|c|c|c|c|}
\hlinex & -10 & 10 & 20 & 30 \\
\hliney & -7 & 3 & 8 & 13 \\
\hline
\end{tabular} A y=−21x−2
B y=−2x+2
C y=2x+2
D y=21x−2
Question 4
1 pts Solve the problem. Economists use what is called a Leffer curve to predict the government revenue for tax rates from 0% to 100%. Economists agree that the end points of the curve generate 0 revenue, but disagree on the tax rate that produces the maximum revenue. Suppose an economist produces this rational function
R(x)=50+x10x(100−x), where R is revenue in millions at a tax rate of x percent. Use a graphing calculator to graph the function. What tax rate produces the maximum revenue? What is the maximum revenue?
Write a function to describe the following scenario. Joe is trying to fix a broken watch by figuring out how many seconds it is behind. He found that it began at 23 seconds behind and fell further behind by 2 seconds every hour.
y=[?]+□x
(2 points)
Solve the rational exponent equation. Use factoring where necessary, If there is more than one answer, enter a comma separated list.
x2/3=4x=□ holp (numbers)
(1 point)
For f(x)=4x3+8x2+4x, determine the x-intercepts and the end behavior. Enter intercepts as a comma separated list of points.
Intercepts: □ help (points)
- As x→−∞,f(x)→□ help (numbers)
- As x→∞,f(x)→□ help (numbers) Inputting the function into the Desmos tool below may help investigate the function.
Find the slope of the line below. Note: Enter negatives when necessary with no space between the negative sign and the number. If your answer is a fraction, enter your answer as a reduced improper fraction. Ex. 1/3 for 62m=□ type your answer...
What kind of transformation converts the graph of f(x)=−2∣x∣+5 into the graph of g(x)=−4∣x∣+10?
vertical shrink
horizontal stretch
vertical stretch
horizontal shrink
Solve the equation by factoring. Check your solution. If there are multiple solutions, list the solutions from least to greatest separated by a comma. Leave in simplest fractional form.
2x2−x−3=0□
Find the function g from the transformations of f(x)=x2: vertical stretch by 2, reflection, then translate. Which is g?
a. g(x)=−2(x+1)2−4
b. g(x)=−2(x+1)2+8
c. g(x)=2(−x+1)2−4
d. g(x)=−2(x−1)2−4
Which set of ordered pairs (x,y) represents a linear function: A = {(0,5), (3,2), (6,-1), (10,-4)},
B = {(0,-1), (3,2), (0,5), (0,7)},
C = {(2,0), (4,0), (5,-3), (6,-5)},
D = {(-4,-5), (-1,1), (0,3), (4,6)}?