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worty [1.4K]
3 years ago
12

Needs to be checked.............

Mathematics
2 answers:
Liula [17]3 years ago
8 0

3y + 11 = 38

3y = 27

y = 9

stealth61 [152]3 years ago
3 0

Your answer should be correct because 3y + 11=38 and then 3y = 27 so y = 9. I think you got it right!

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If you toss 9 fair​ coins, in how many ways can you obtain at least one tail​?
maks197457 [2]
9/18 or 50% if you toss the coin because when you toss 1 coin you get a 1/2 chance of getting tails. Do that nine times and you get 9/18
3 0
3 years ago
If f is a continuous function such that the integral from 1 to 4 of f of x, dx equals 10, evaluate the integral from 2 to 8 of 2
IgorLugansk [536]

Answer: 10

Step-by-step explanation:

Since integral from 1 to 4 of f(x) =10

To evaluate integral from 2 to 8 of 2 times f(2x), using substitution method

Let U = 2x, dU = 2dx, dx = dU/2

Evaluate the limit, upper limit gives dU = 2*4 = 8, lower limit gives dU = 2*1 = 2.

Since this limit are the same as the limit for the question,

Therefore, F(4) - F(1) = F(8) - F(2) = 10

Substituting dx=dU/2

Gives,

Integral from 2 to 8 of 2 times f(2x)= (1/2)(2)(F(8)-F(2)) = 10

6 0
3 years ago
Issac tosses a quarter off of a bridge, creating the shape of a parabola. The parabola can be represented by the equation h=-16t
andreyandreev [35.5K]

Answer:

Step-by-step explanation:

a) the equation representing the parabola is expressed as

h = -16t² - 4t + 20

c) to determine the height after 25 seconds, we would substitute 25 for t into the given equation. It becomes

h = -16(25)² - 4(25) + 20

h = - 10000 - 100 + 20

h = - 10080

d) when the coin lands on the ground, the height would be 0. Therefore,

-16t² - 4t + 20 = 0

Dividing both sides of the equation by 4, it becomes

- 4t² - t + 5 = 0

- 4t² - 5t + 4t + 5 = 0

- t(4t + 5) + 1(4t + 5) = 0

- t + 1 = 0 or 4t + 5 = 0

t = 1 or t = - 5/4

Since t cannot be negative, then t = 1 second

4 0
3 years ago
How to expand the number 2,937,082​
denis-greek [22]
2x1,000,000
9x100,000
3x10,000
7x1,000
0x100
8x10
2x1
7 0
2 years ago
Decide whether the triangle is a right triangle.​
Harrizon [31]

Answer:

no it is not a right angle triangle

3 0
3 years ago
Read 2 more answers
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