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igor_vitrenko [27]
3 years ago
11

How many times does a person blink in 1.5 min

Mathematics
1 answer:
Neporo4naja [7]3 years ago
3 0
About 22-30 times in 1.5 minutes
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Timy found 4 quarters, 8 dimes, 2 nickels, ando 9 pennies under the couch cushions. How mu have money did he find?
suter [353]
The amount of money found under the couch cushion is $1.99 

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3 years ago
What is the gcf of 39 and 42
natulia [17]
The answer is 3 because it goes into 39 and 42 and 6 doesn't go into 39
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3 years ago
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Paul went on a bike ride of 30 miles. He realized that if he had gone 8 mph faster, he would have arrived 12 hours sooner. How f
lara [203]

Answer: He actually rode 2 miles per hour on his trip

Step-by-step explanation: Maybe unconventional, but express the time it took, then figure the speed.

Time  = distance /speed  t will represent time, s is the speed:  t = 30/s Use the rime it would have taken at the higher speed to create an equation:

t-12 = 30/s+8   replace the y with the 30/s

30/s -12 = 30/s+8

(s)(30/s -12 ) = (s)(30/s+8 )  Cross multiply to cancel denominators  

(s-8)(30 -12s) = (s-8)(30s/s+8 ) ==> 30s +240 -12s² -96s =30s   Simplify:  

(-1)(-12s² -96s +240 ) =0 ==>  12s² +96s -240  divide all by 12

s² + 8s -20 = 0   Factor and solve for s

(s +10)(s -2) =0    s-2=0   S= 2  

Proof:

30/2 = 15 hours for original trip at 2mph,  

increase speed by 8mph   2 + 8 = 10mph

30 miles at 10mph takes 3 hours; that is 12 hours less than his actual trip.

(Brainilest, please :-)

4 0
3 years ago
What is the quality of 4x+27x=5
Nadya [2.5K]

Answer:

<h3>X=5/31=0.16</h3>

Step-by-step explanation:

Isolate x on one side of the equation.

4x+27x=31x (Combine like terms, group like terms, & Add.)

31x=5

31x/31=5/31 (Divide by 31 from both sides.)

5/31=0.16

x=5/31=0.16

In conclusion, the correct answer is x=5/31=0.16.

8 0
3 years ago
Someone please answer! 8th grade math question.
yulyashka [42]

Answer: there is 3 terms

Step-by-step explanation: each term is separated by a sybol (addition, substation, multiplication, etc).

7 0
3 years ago
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