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3 years ago

PLS HELP ME WITH Question 4

Mathematics

1 answer:

Veseljchak [2.6K]3 years ago

7 0

Answer:

7.5 min/ mile

Step-by-step explanation:

Divide the time taken in minutes by the distance in miles

3 hours = 3 × 60 = 180 mins

3 hours 15 min = 180 + 15 = 195 mins

Average time = $\frac{195}{26}$ = 7.5 min/ mile

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lilavasa [31]

Answer:

$y=\frac{1}{4} e^{2x}+\frac{3}{4} e^{-\frac{2}{3}x }$

Step-by-step explanation:

Let, $D=\frac{d}{dx}$

Now, us simplify the given differential equation and write it in terms of D,

$36y''-48y'-48y=0$

or, $3y''-4y'-4y=0$

or, $(3D^2-4D-4)y=0$

We have our auxiliary equation:

$3D^2-4D-4=0$

or, $(3D+2)(D-2)=0$

or, $D=2, - \frac{2}{3}$

Therefore our solution is,

$y=Ae^{2x}+Be^{- \frac{2}{3}x}$

and, $y'=2Ae^{2x}-\frac{2}{3}Be^{\frac{2}{3}x }$

Applying the boundary conditions, we get,

$A+B=1$

$2A-\frac{2}{3}B=0$

Solving them gives us,

$A=\frac{1}{4} ,B=\frac{3}{4}$

Hence,

$y=\frac{1}{4} e^{2x}+\frac{3}{4} e^{-\frac{2}{3}x }$

4 0

3 years ago

Solve: 1 × -23 = Question 9 options: -1 1 23 -23

Nonamiya [84]

Answer:

-23

Step-by-step explanation:

1 × -23

1. When multiply a positive number by a negative number, the answer will always be negative.

2. When we multiply any number by 1, that number will stay the same.

$1 * -23$
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Therefore, the answer is -23!

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3 years ago

Jones of Boston borrowed $40,000, 90 day, 10% note. After 60 days Jones made an initial payment of $6,000. Assuming the U.S. Rul

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check a website called math-way without the dash it might help

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3 years ago

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Answer:

1. 9461000000000

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3 years ago

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kipiarov [429]

Answer:

Dear we can't give you an answer without the options.

Step-by-step explanation:

ratios that are equivalent to 6:9 are however

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3 years ago