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Nadusha1986 [10]
3 years ago
5

If people blink about 13 times per minute, how many times do they blink in 7 hours?

Mathematics
1 answer:
SCORPION-xisa [38]3 years ago
4 0

Answer:

Step-by-step explanation:

1 hour=60 min

7 hours=60×7=420 min

number of blink=420×13=5460

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Putting the other player's king in check is always a good move. true or false subject: chess
Elena-2011 [213]

Putting the other player's king in check is always a good move. true

<h3>What is chess?</h3>

  • The policies of chess allow a king to take an opponent's piece whilst in check, so long as that piece isn't always being defended.
  • At the equal time, a king in the test is usually forced to move.
  • The standard regulations of chess, a participant may not make any pass that places or leaves their king in the test.
  • A player may additionally pass the king, seize the threatening piece, or block the check with some other piece.
  • A king cannot look at the opposing king, considering this will vicinity the first king in check as well.

Learn more about chess here:-

#SPJ2

7 0
1 year ago
Myra is a scientist and needs 45 gallons of a 16% acid solution. The lab is currently stocked only with a 20% acid solution and
asambeis [7]

Answer:

The volume of the solution with 20% acid is 27 gallons and the one with 10% acid is 18 gallons

Step-by-step explanation:

Myra needs to mix "x" gallons of the solution with 20% and "y" gallons of the solution with 10%. The volume of the final solution must be 45 gallons, therefore:

x + y = 45

The concentration of acid of the final solution is:

0.2*x + 0.1*y = 45*0.16

0.2*x + 0.1*y = 7.2

Therefore we have a system of equation:

x + y = 45

0.2*x + 0.1*y = 7.2

We need to multiply the first equation by -0.1:

-0.1*x -0.1*y = -4.5

0.2*x + 0.1*y = 7.2

We now sum both equation:

0.1*x = 2.7

x = 2.7/0.1 = 27 gallons

y = 45 - 27  = 18 gallons

6 0
3 years ago
Find the length of side x in simplest radical form with a rational denominator.
alekssr [168]

Answer:

x = \frac{2*\sqrt{3}}{3}

Step-by-step explanation:

Reference angle = 30°

Opposite side = x

Adjacent side = 2

Apply the tan trigonometric function, thus:

tan (30) = \frac{opp}{adj}

tan (30) = \frac{x}{2}

2 * tan (30) = x

2 * \frac{1}{sqrt{3}} = x (tan 30 = 1/√3)

\frac{2}{sqrt{3}} = x

Rationalize

\frac{2* \sqrt{3}}{sqrt{3} * \sqrt{3}} = x

\frac{2*\sqrt{3}}{3} = x

4 0
3 years ago
Is 1 bigger then 1.625 just asking
Ostrovityanka [42]
Yes it is, any decimal after the number one will be bigger than one
4 0
3 years ago
Read 2 more answers
Solve showing all work<br> Y=x^2+3 <br> y=x+5
Romashka-Z-Leto [24]

Answer:

x=2 , x=(-1)

Step-by-step explanation:

y=x^2+3----------1

y=x+5-------------2

1=2

x^2+3 = x+5

x^2-x-2=0

(x-2)(x+1)=0

x=2 , x=(-1)

8 0
2 years ago
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