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astraxan [27]
2 years ago
14

when I double my number subtract three subtract my number and add four I get my number plus two what is my number

Mathematics
1 answer:
Airida [17]2 years ago
8 0

Answer:

x+1

Step-by-step explanation:

x * 2 -3 - x + 4 =

2x - 3 - x + 4

x - 3+4 = x+1

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On a large baking tray, 40 cookies can be baked together. To bake 40 cookies it takes 14 minutes, for baking 80 cookies it takes
Serggg [28]

Answer:

B. 56

Step-by-step explanation:

1 cookie - 14 minutes

max. 40 cookies

140-100=40

42+14=56

5 0
3 years ago
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The state medical school has discovered a new test for tuberculosis. (If the test indicates a person has tuberculosis, the
Inessa [10]

The probability according to the given scenario is:

(a) <em>0.0395</em>

(b) <em>0.95</em>

(c) <em>0.076</em>

The given values are:

  • P(B/A) = 0.79
  • P(A) = 0.05

(a)

The probability that the  b/w has tuberculosis as well as having (+) test will be:

→ P(A \cap B) = P(B/A).P(A)

By substituting the values, we get

→                  = 0.79\times 0.05

→                  = 0.0395

(b)

The probability that a person does not have tuberculosis will be:

→ P(A') = 1-P(A)

→            =1-0.05

→            = 0.95

(c)

The person does not have tuberculosis as well as have a (+) test, the probability will be:

→ P(A' \cap B) = P(A').P(B/A')

→                  = 0.95\times 0.08

→                  = 0.076

Learn more:

brainly.com/question/14816227

8 0
2 years ago
Find a homogeneous linear differential equation with constant coefficients whose general solution is given by
frez [133]

Answer:

y" + 2y' + 2y = 0

Step-by-step explanation:

Given

y=c_1e^{-x}cosx+c_2e^{-x}sinx

Required

Determine a homogeneous linear differential equation

Rewrite the expression as:

y=c_1e^{\alpha x}cos(\beta x)+c_2e^{\alpha x}sin(\beta x)

Where

\alpha = -1 and \beta = 1

For a homogeneous linear differential equation, the repeated value m is given as:

m = \alpha \± \beta i

Substitute values for \alpha and \beta

m = -1 \± 1*i

m = -1 \± i

Add 1 to both sides

m +1= 1 -1 \± i

m +1= \± i

Square both sides

(m +1)^2= (\± i)^2

m^2 + m + m + 1 = i^2

m^2 + 2m + 1 = i^2

In complex numbers:

i^2 = -1

So, the expression becomes:

m^2 + 2m + 1 = -1

Add 1 to both sides

m^2 + 2m + 1 +1= -1+1

m^2 + 2m + 2= 0

This corresponds to the homogeneous linear differential equation

y" + 2y' + 2y = 0

6 0
3 years ago
Bruno is 4.5 times as old as Charles if Bruno is 27 how old is Charles
andrey2020 [161]

Answer:

6

Step-by-step explanation:

Bruno(B)= 4.5× Charles(C)

8 0
3 years ago
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If the bug jumps 7 units and lands at 0, where could it have started?
fenix001 [56]
The answer is -7 jzzoksjsjs
8 0
3 years ago
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