Alyssa wants to know her fuel savings by traveling to the Moon vs. Mars. Round trip distances: d1=1.22×108km, d2=8.12×105km. Fuel efficiency: 1.54×103km/L, cost: \$3.23 \times 10^{2} per liter. Calculate savings.
Analyze the polynomial f(x)=(x+8)2(1−x): (a) End behavior: y=□ for large ∣x∣.
(b) Find x- and y-intercepts.
(c) Determine zeros and their multiplicity.
(d) Max turning points?
(e) Graph f. Choose A, B, C, or D.
4. A paper airplane is thrown from the top of a building. The graph shows the relationship between the time, in seconds, after the paper airplane is thrown ( x ) and the height of the paper airplane above the ground. What does the x-intercept of the graph indicate?
(a) The height from which the airplane is thrown.
(b) The speed at which the airplane is traveling.
(c) The maximum height that the airplane reaches.
(d) The number of seconds the airplane is in the air.
www-awu.aleks.com/alekscgi/x/lsl.exe/1o_u Exponants and Pefyromials
Introduction to the power rules of exponente Simplifi.
(x2)3 Write your answer without parentheses.
Tho number of bacteria growing in an incubation culture increases with time according to n(t)=6900(2)t, where is time in days. Find the number of bacteria when x=0 and x=3.
Find a linearly independent set of vectors that spans the same subspace of R4 as that spanned by the vectors
⎣⎡2201⎦⎤,⎣⎡−4−22−5⎦⎤,⎣⎡32−13⎦⎤,⎣⎡76−15⎦⎤ A linearly independent spanning set for the subspace is:
⎩⎨⎧⎣⎡□□□□⎦⎤,⎣⎡⎣⎡□□□□⎦⎤⎭⎬⎫...........□⎦⎤
A company that manufactures small canoes has a fixed cost of $14,000. It costs $40 to produce each canoe. The selling price is $80 per canoe. (In solving this exercise, let x represent the number of canoes produced and sold.)
a. Write the cost function.
C(x)=14000+40⋅x (Type an expression using x as the variable.)
b. Write the revenue function.
R(x)=□ (Type an expression using x as the variable.)
11. The partial fractional decomposition of the expression
x4−163x2−2x+1
is
(a) x+2A+x−2B+x2+4C.
(b) x+2A+x−2B+x2+4Cx+D.
(c) x2−4Ax+B+x2+4Cx+D.
(d) x+2B+x−2B+(x+2)2C+(x−2)2D.
(e) x4−16A+Bx+Cx2+Dx3.
5. Simplify (a) l(A,B,C,D)=π(0,2,5,7,8,10,13,15)
(0.5 mark)
(b) T(A,B,C,D)=Σ(1,3,4,6,9,11,12,14)
( 0.5 mark) 6. (a) An alternating current is defined by the equation: i=25Sin100πtmA. Determine its mean value over half-a-cycle and the root-mean square values over a cycle.
(0.5 mark)
(b) A body has an initial velocity of 100m/s and it is subjected to a retardation of 25m/s2. Find the mean value of the velocity of the body during its forward motion.
(0.5 mark)
Scanned with OKEN Scan 7. (a) Find the position of the centroid of the area bounded by the curve y=3x2, and the x-axis and the ordinates x=0 and x=2
(0.5 mark)
(b) For the first quadrant area bounded by the curve y=10−x2. Find the moment of inertia w.r.t. the y-axis
(0.5 mark) 8. (a) Determine the co-ordinates of the centroid of the area lying between the curve y=5x−x2 and the x-axis
(0.5 mark)
(b) Find the moment of inertia about the x-axis of the region bounded by y=x2 and y=x−1
(0.5 mark) 9. A d.c circuit comprises four closed loops. Applying Kirchhoff's laws to the closed loops give the following equations for the current flow in milliamperes:
4i1+3i2+i3−i42i1+5i2+2i3+i4i1+4i2+4i3+6i43i1+i2−i3+5i4=14=17=20=12 Use the Gaussian elimination method to Solve for i1,i2,i3, and i4.
(1 mark) 10. Use simplex method to solve
Maximize z Subjected to =7x1+5x22x1+x2≤104x1+3x2≤24x1≥0,x2≥0
(1 mark)
Systems of Linear Equations: Tutorial
13 of 26
? Question
Plane A is descending toward the local airport at a rate of 2,500 feet/minute. It is currently at an altitude of 12,000 feet. Plane B is ascending from the same airport at a rate of 4,000 feet/minute. It is currently at an altitude of 1,000 feet.
This system of equations models this real-world situation, where x represents the time in minutes and y represents the altitude in thousands of feet:
y=12−2.5xy=1+4x Graph the lines of the two equations, and mark the point of intersection for the two lines. In approximately how many minutes will the two planes be at the same altitude? At what altitude will they be?
List the eigenvalues of A . The transformation x↦Ax is the composition of a rotation and a scaling. Give the angle φ of the rotation, where −π<φ≤π, and give the scale factor r.
A=[−83−88−83] The eigenvalues of A are λ=−83+8i,−83−8i.
(Simplify your answer. Use a comma to separate answers as needed. Type an exact answer, using radicals and i as needed.)
φ=□
(Simplify your answer. Type an exact answer, using π as needed.)
6. A producer can sell 2000 items at a price of 10$ for each one. For each decrease in price of 2$, the producer can sell an additional 100 items. The demand equation is
a) p=0.02x+50.
b) p=−0.002x+14.
(c) p=−0.02x+50.
d) p=0.02x−14.
Aufgaben zum Einsetzungsverfahren
1) Lose wie in Beispiel 1: a) ∣∣4x+2y=8y=8x−1
b) ∣∣2x+y=6y=−4x
c) ∣∣6x+y=−4y=−3x+2
2) Lóse wie in Beispiel 2: a) ∣∣x+y=11x=−3
b) ∣∣x−5y=−16−5x+20y=40
c) ∣∣2x+3y=−30x=−2y−30
3) Lơse wie in Beispiel 3: a) ∣∣4x+7y=−84x+3y=8
b) ∣∣3x+8y=95x−8y=15
c) ∣∣7x+19y=−312x+19y=22
(mache jeweils die Probe und überprüfe somit dein Ergebnis!)
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5 of 5 Match the simplified expression with the correct problem.
43(8x+16)2x−5x+5−4x+x+x+3+5−23+2(2x+5)9x−24x+13−3x+16x+123x+6
A business owner pays $1,200 per month in rent and a total of $120 per hour in employee salary for each hour the store is open. On average, the store brings in $200 in net sales per hour.
Which equations can be solved to determine the break-even point if C(x) represents the cost function, R(x) represents the revenue function, and x the number of hours per month the store is open?
C(x)=1,200+120xR(x)=200xC(x)=1,200+120R(x)=200xC(x)=200xR(x)=1,200+120xC(x)=200xR(x)=1,200+120
Backspace A stone fall from a railroad overpass which is 36 ft high into the path of a train which is approaching the overpass with uniporm speced It the stone falls when the train is 50 ft away from the overpass and thestome hit the gmind just as the train anives at that spot, how fast is the train movin
Question 1
(a) Kapil opened a recurring deposit account in a bank. He deposits ₹ 1500 every month
[3]
for 2 years at 5% simple interest per annum. Find the total interest earned by Kapil on maturity.
b) If A=[2112],B=[1243] and C=[−1−225], find A(B−C).
[3] The table below shows the daily expenditure on food of 50 house-holds in a locality.
[4]
\begin{tabular}{|c|c|c|c|c|c|c|}
\hline \begin{tabular}{c}
Daily \\
Expenditure \\
(in ₹)
\end{tabular} & 0−100 & 100−200 & 200−300 & 300−400 & 400−500 & 500−600 \\
\hline \begin{tabular}{c}
Number of \\
House-holds
\end{tabular} & 5 & 8 & 15 & 10 & 7 & 5 \\
\hline
\end{tabular} Using graph paper, draw a histogram representing the above distribution and estimate the mode. Take along x-axis 2cm=₹100 and along y-axis 2cm=2 Households. This paper consists of 8 printed pages.
11
Turn Ov
yright reserved.
Copy and complete the table below for the graph of y=2x+1.
What values should replace A and B?
\begin{tabular}{c|c|c|c|c|c}
x & -1 & 0 & 1 & 2 & 3 \\
\hliney & -1 & A & 3 & B & 7
\end{tabular}
The Venn diagram below shows information about the number of items in sets F and G. Given that there are fewer than 94 items in total, what is the largest possible number of items in set F?
Question 3
Regina invests in a bond that increases in value based on the function V(t)=470(2.003)s, where t is the time elapsed in yeers and V(t) is the value of the bond in dollars.
등
x=# of y rs
y= value of ingnd Estimate the amount of time it will take for Reoina's bond
b- 913<t<914
C- 13<t<14=
. .09
: 0:91
d- 914<t<35
Graph these equations:
y=3y=4 Click to select points on the graph.
y=3y=4 How many solutions does the system of equations have?
no solution
no solution
one solution
one solution
infinitely many solutions
Sctbmitit
Work it out
The polynomial of degree 3,P(x), has a root of multiplicity 2 at x=1 and a root of multiplicity 1 at x=−1. The y-intercept is y=−0.3 :
Find a formula for P(x).
P(x)=□
1. Rewrite each expression as an equivalent expression with a positive exponen
a) 5−4
c) 2−41
e) (113)−1
b) (−101)−3
d) −(56)−3
f) 8−17−2 2. Write each expression as a single power with a positive exponent.
a) (−10)8(−10)−8
c) 2−528
e) (−94)−1
b) 6−7×65
d) 11511−3
f) [(7−3)−2]−2 3. Which is the greater power, 2−5 or (21)−5 ? Explain.
Solve the system below by interpreting it as the matrix equation AX=B and finding the inverse coefficient matrix.
x−2y+z=33−2x+7y−4z=−1082x+3y−3z=−35 Calculate A−1.
□
Calculate A−1B.
□
What is x ?
Preview
11
11
Not equivalent.