3 years ago

Can someone please help me on number 6 with writing the inequality

Mathematics

1 answer:

Brilliant_brown [7]3 years ago

6 0

9514 1404 393

Answer:

3 ≤ z ≤ 20

Step-by-step explanation:

The zoom capability ranges from 3 to 20, so we can write the compound inequality ...

3 ≤ z ≤ 20

You might be interested in

What is 20x times x

alexira [117]

Answer:

20x^2

Step-by-step explanation:

$20x \times x\\\\\mathrm{Apply\:exponent\:rule}:\quad \:a^b\times \:a^c=a^{b+c}\\\\xx=\:x^{1+1}\\\\=20x^{1+1}\\\\\mathrm{Add\:the\:numbers:}\:1+1=2\\\\=20x^2$

5 0

3 years ago

Two trains travel a 160 km track each day. The express travels 10 km h^-1 faster and take 30 minutes less time than the normal t

aniked [119]

Let s = the speed of the slower train in km/hrs+10 = the speed of the faster train in km/hrLet t = time in hrs for the slower train to go 160 kmt-5 = time in hrs for faster train to go 160 km---------------Slower train:(1)
160=s.t

Faster train:(2) 160=(s+10) .(t-.5)From (1)(1) t=160/s
use the relations given in following screenshot and then use quadratic equation.