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slega [8]
3 years ago
5

What is the value of y

Mathematics
1 answer:
Murrr4er [49]3 years ago
5 0
The value of y can be anything without a problem to solve
It can be any number of (-)''s or (+)'s
You might be interested in
A commercial jet can fly 868 miles in 2 hours with a tailwind but only 792 miles in 2 hours into a headwind. Find the speed of t
erik [133]

Answer:

The speed of the jet in still air is 415 mph and the speed of the wind is 19 mph

Step-by-step explanation:

we know that

The speed is equal to divide the distance by the time

Let

x -----> the speed of the wind in miles per hour

y ----> the speed of the jet in still air in miles per hour

we know that

<em>With a tailwind</em>

y+x=\frac{868}{2}

y+x=434 ----> equation A

<em>With a headwind</em>

y-x=\frac{792}{2}

y-x=396 ----> equation B

solve the system of equations A and B by elimination

Adds equation A and equation B

y+x=434\\y-x=396\\------\\y+y=434+396\\2y=830\\y=415

<em>Find the value of x</em>

y+x=434

415+x=434

x=434-415

x=19

therefore

The speed of the jet in still air is 415 mph and the speed of the wind is 19 mph

6 0
3 years ago
Read 2 more answers
The scatter plot shows a hiker's elevation above sea level over time. The equation of the trend line shown is y = 8.77x + 686. T
svetlana [45]

Answer:

707 feet above sea level

Step-by-step explanation:

2 hours and 25 minutes is about 2.4167 hours.

Therefore:

y=8.77x+686

y=8.77(2.4167)+686

y=21.1944+686

y=707.1944

So the hiker's elevation will be approximately 707 feet above sea level

8 0
3 years ago
Brandon buys a radio for $44.57 in a state where the sales tax is 7%.
grigory [225]

Answer:

$3.12

Step-by-step explanation:

44.57 x 0.07 = 3.12

8 0
3 years ago
Gambles are independent, and each one results in the playerbeing equally likely to win or lose 1 unit. Let W denote the netwinni
san4es73 [151]

Answer:

P{W>0}=0.5

P{W=0}=0.25

E{W}=0

Step-by-step explanation:

<u>Given:</u>

Gambles are independent i.e. each player is equally likely to win or lose 1 unit. OR each player has equal probability to win or lose 1 unit.

Let W denote the net winnings of a gambler whose strategy is to stop gambling immediately after his first win.

Then

<u>A.P{W>0}=?</u>

P{W>0}=0.5, because each player is equally likely to win or lose on first gamble. i.e there is equal chances for winning or losing on the first gamble.

<u>B.P{W<0}=?</u>

for P{W<0} we need to find P{W=0} first as;

P{W=0}=0.25

As there is equal probability to win or lose, after first win, if you want to finish gamble with no profit (equal number of lose and win) then if you losing, you have equal probability to win or lose so to finish your game with P=0 your probability is 0.25 (half of 0.5)

P{W<0} means net lose which is equal to total probability minus probability of profit and probability of net profit equal to zero.

i.e. P{W<0}=1-P{W=0}-P{W>0}

P{W<0}=1-0.25-0.5=0.25

<u>C.E{W}=?</u>

E{W}=P{W>0}*{W>0}+P{W<0}*{W<0}+P{W=0}*{W=0}

E{W}=0.5*(1)+0.5(-1)+0.25*(0) (for any value of W,P{W>0}*{W>0}+P{W<0}*{W<0}=0, because sum of same positive and negative numbers is zero)

E{W}=0

8 0
3 years ago
Raul is making a scale model of an airplane that has a wingspan of 44 feet. If Rauls scale model is 1/16 the size of the actual
KATRIN_1 [288]
You would divide 44 by 16 so the wing span is 2.75 ft.
5 0
3 years ago
Read 2 more answers
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