1,642 Answered Questions for the topic Math Help For College
06/10/16
Solve the differential equation xy' = y + xe^(9y/x) by making the change of variable v = y/x.
Solve the differential equation xy' = y + xe^(9y/x) by making the change of variable v = y/x.
Please help and show your work! Thanks in advance!
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Math Help For College
06/10/16
one to one functions
The one-to-one function g is defined below. g(x)=5x/3x-7 Find g^-1(x), where g^-1 is the inverse of g. Also state the domain and range of g^-1 in interval notation. g^-1(x) = ? Domain of g^-1 =...
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Math Help For College
06/09/16
Could someone help correct my math problems?
A. 2(4)-8/2+8
and i got 0/10 which is 0
B. 3(-5-3)+4(7-9)/5(-2)+3(-4)
and got 16/11
C. 2/5(5x+10)
and got 2x+4
D. A(1-1/A)
and got A/1-1
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Math Help For College
06/08/16
could someone help validate my answers?
A.
-5(-6)(-7)
-5(42)
-210
B. -8(2-7)-9(3-5)
8(-5)+18
-40+18
-22
C. (-4/3)^2
-4/3 x -4/3
16/9
D. 4/9 x 27/8
and i got 3/2
are these correct? please help
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06/08/16
How can I solve this?
A Web music store offers two versions of a popular song. The size of the standard version is 2.2 megabytes (MB). The size of the high-quality version is 4.2 MB. Yesterday, there were 1090 downloads...
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06/06/16
How long will it take before they are 360 kilometers apart?
A train leaves little rock Arkansas, and travels north at 65 kilometers per hour. Another train leaves at the same time and travels south at 55 kilometers per hour. How long will it take before...
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Math Help For College
06/06/16
Decide whether ?, ?, both, or neither can be placed in the blank to make a true statement. Ø ________ {3, 17, 30, 42}
Dont understand
Math Help For College
06/05/16
much does this add to the total operating cost per year?
The total operating cost for a truck is $400 000 per year. The percentage breakdown of this total amount was 40 percent fixed costs, 30 percent fuel, 20 percent finance, 10 percent maintence....
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05/26/16
Pre Calculus
Which of the answer choices has matrix multiplication defined?A B C D⌈1 2⌉ ⌈5 6 7⌉ ⌈-1 2 3⌉ [5 9 7]
⌊3 4⌋ ⌊8 9 0⌋ l8 -4 0l
..................⌊6 7 1⌋
a) ACb) BAc) ABd) CD
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05/26/16
Pre Calculus
Determine the quadrant when the terminal side of the angle lies according to the following conditions: sin (t) < 0, csc (t) > 0.a) Quadrant Ib) Quadrant IVc) Quadrant IId) Quadrant III
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05/26/16
Pre Calculus
Find a unit vector in the same direction as the given vector: v = 3i + 4 j.a) u=3/25i+4/25j b) u=3/√7i+4/√7jc) Vector v = 3i + 4 j is a unit vector.
d) u=3/5i+4/5j
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05/26/16
Pre Calculus
Find the projection of vector u onto vector v; projvu= ((u•v)/llvll2)vu = i – 5j and v = i + 5j
a) -12/13i-60/13j
b) 1/13i+5/13j
c) 12/13i+60/13j
d) -1/13-60/13j
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05/26/16
Pre Calculus
Use DeMoivre’s Theorem to find the power of the complex number and write your solution in the form, a + bi.a) −4 − 4i b) -4√2-4√2ic) −8 − 8i
d) -2√2-2√2i
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05/26/16
Pre Calculus
Rewrite the given parametric equations in Cartesian form: x(t)=4-t y(t)=3t+2
a) y=14-3x
b) y=3x+2
c) y=x+4
d) y=4-x
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05/25/16
Use the tangent plane approximation to find f(33,4).
The number of minutes taken for a chemical reaction if f(t,x). It depends on the temperature t degrees celcius, and the quantity, x grams, of a catalyst present. When the temperature is 30 degrees...
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05/25/16
Express the total cost of the box & find the least costly dimensions.
A rectangular box must have a volume of 2 cubic meters. The material for the base and top costs $ 2 per square meter. The material for the vertical sides costs $ 64 per square meter.(a) Express the...
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05/25/16
What are the x & y values at the minimum?
Find the x and y values at the minimum off(x)=2x2+xy+2y2+6y+7
I have tried this multiple times but I keep getting marked wrong. I'm not really sure how to approach this correctly so it would be...
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05/23/16
Please help me solve this question
investor has deposited $80,000 in an account that pays 5.3% annual interest, compounded continually. How long will it take until the accounts balance is $100,000?
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05/23/16
Help me solve .....How long will it take the colony of 15,000 cells to grow to 250,000 cells?
during its exponential growth phase, a colony of the bacterium E. Coli grew from 15,000 cells to 60,000 cells in 40 minutes. How long will it take the colony of 15,000 cells to grow to 250,000 cells?
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05/23/16
What is F_R?
The gravitational force of attraction between two masses m and M at a distance apart of R is F=(GmM)/R2Where G is the universal gravitational constant. Suppose that m is the mass of a rocket which...
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05/22/16
Please help me solve this word problem
In 1997, lowe's had 427 stores nationwide. By 1999, this total had grown to 520. If the number of stores continues to grown exponentially at this rate, how many stores will there be in 2017?
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05/22/16
An investor has deposited $80,000!in an account that pays 5.3% annual interest, compounded continually .
An investor has deposited $80,000 in an account that pays 5.3% annual interest, compounded continually. How long will it take until the accounts balance is $100,000?
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05/21/16
Pre Calculus
Find the exact value of the expression tan(7pi/12)
a) 2(1+√3)-2
b) 2(1-√3)-2
c) -2(1+√3)-2
d) -2(1-√3)-2
05/21/16
Pre Calculus
Use the given triangle to evaluate the trigonometric expression. The graph is a right triangle, the side on the y-axis =5 and the side o the x-axis =12. The hypotenuse is not given. sin(y/2)=?
a)...
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