3 years ago

Twice the difference between a number and 10 is equal to 6 times the number plus 16. What is the number?

1 answer:

8 0

This is a lot of math to write.... so I'll just say the answer is -21 :D

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makkiz [27]

$f(t)=h=-16t^2+20t+6

$

a=-16, b=20, c =6

Δ= $b^2-4ac=20^2-4*(-16)*6=400+384=784$

$\sqrt{Δ}=\sqrt{784}=28$

max:

$p=-\frac{b}{2a}=-\frac{20}{-32}=\frac{20}{32}=\frac{5}{8}$

max heigh: $h=-16(\frac{5}{8})^2+20*\frac{5}{8}+6=-16\frac{25}{64}+\frac{100}{8}+6$

$h=-\frac{25}{4}+\frac{50}{4}+6=\frac{-25+50+24}{4}=\frac{49}{4}$

$h=\frac{49}{4}$ at $t=\frac{5}{8}s$

will fall down at t:

$t=\frac{-20-28}{-32}=\frac{-48}{-32}=\frac{3}{2}=1.5$

$t=1.5s$

8 0

3 years ago

SSSSS [86.1K]

Answer:

4x-20 is the same as x+x+x+x-20

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3 years ago

Masteriza [31]

Use the distance formula for the 2 points and then halve the answer

7 0

2 years ago

4vir4ik [10]

$78 for each tire
4,992 divided by 64 is 78

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3 years ago

Kipish [7]

Answer:

-10

Step-by-step explanation:

5 0

3 years ago