Please help it’s a test

Mathematics

2 answers:

Andrew [12]3 years ago

5 0

Answer:

12 dollars

Step-by-step explanation:

equatioms

igor_vitrenko [27]3 years ago

3 0

Answer:

x = 12 ($12)

Step-by-step explanation:

3x - 4 = 2x + 8

x = 12

...

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About 2% of the population has a particular genetic mutation. 1000 people are randomly selected. Find the mean for the number of

Alla [95]

Answer:

Step-by-step explanation:

We khow that the genetic mutation affect 2 percent of the population .

Let's try to understand what does this mean :

in a group of 100 people there is possibility of finding 2 people with this genetic mutation
in a group of 1000 the possibility raises to 20 people so we can deduce that each time we add a zero we add a zero in 2

so :

100⇒2
1000⇒20
10000⇒200
100000⇒2000

and so on

6 0

3 years ago

Simplify

frosja888 [35]

Just do this :
-1 + 30 - 5y
29 - 5y
or -5y + 29
the answer is C

6 0

3 years ago

The height, h, in feet of a rock above the ground is given by the equation h = -16t^2 + 24t + 16, where t is the time in seconds

boyakko [2]

The rock will hit the ground at 2 seconds.

Explanation:

Given that the height, h, in feet of a rock above the ground is given by the equation $h=-16t^2+24t+16$ , where t is the time in seconds after the rock is thrown.