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2 years ago

A number decreased by half of the number is four find the number Help please!

Mathematics

2 answers:

Tomtit [17]2 years ago

6 0

Answer:

Step-by-step explanation:

Write equation:

x=the unknown number

x-x/2=4x

Next: Solve equation

Isolate the variable on one side. The answer is:

x=0 The number is 0.

BARSIC [14]2 years ago

5 0

Answer:

Step-by-step explanation:

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HELP ME PLEASE! I need HELP!

vivado [14]

Answer:

103⁰

Step-by-step explanation:

straight line= 180⁰

180⁰-77 = 103⁰

5 0

1 year ago

Given that cosA = -8/17 and sinA is negative, determine the value of tanA.

borishaifa [10]

Answer:

tan A = -15/8.

Step-by-step explanation:

sin^2a = 1 - cos^2A

= 1 - (-8/17)^2

= 225/289

So sin A= 15/17

tan A = sin A / cos A

= 15/17 / -8/17

= 15/-8

= -15/8.

5 0

2 years ago

Name

nadya68 [22]

Answer:

the pepepepepepepepep

Step-by-step explanation:

8 0

3 years ago

Suppose f(x) = 3x^2 - 2x... Find f(-4)

zavuch27 [327]

Let x equal to -4 and substitute into the original function f(x)
f(-4)=56

4 0

2 years ago

A certain insecticide kills 60% of all insects in laboratory experiments. A sample of 12 insects is exposed to the insecticide i

Vilka [71]

Answer:

The probability that exactly 10 insects will die

P( X = 10 ) = 0.06385

Step-by-step explanation:

Step(i):-

Given a certain insecticide kills 60% of all insects in laboratory experiments

Given proportion p = 0.60

q = 1 - 0.60 = 0.40

Given sample size 'n' = 12

Step(ii):-

Let "X' be the random variable of binomial distribution

$P(X=r) = n_{C_{r} } p^{r} q^{n-r}$

The probability that exactly 10 insects will die

$P(X=10) = 12_{C_{10} } (0.60)^{10} (0.40)^{12-10}$

$n_{C_{r} } = \frac{n!}{(n-r)!r!} = \frac{12!}{(12-10)!10!} = 66$

$P(X=10) = 66 X (0.60)^{10} (0.40)^{2} = 0.06385$

Final answer:-

The probability that exactly 10 insects will die

P( X = 10 ) = 0.06385

4 0

2 years ago