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Lorico [155]
3 years ago
14

X=-7+21 2y-6x=6 need help with Substitution

Mathematics
1 answer:
Reika [66]3 years ago
3 0

Answer:

x = 14   y = -3x + 3

Step-by-step explanation:

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Two friends, Neil and Charlie, are going to depart from their houses and ride their bikes towards each other until they meet, an
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Answer:

0.3 hour or 18 minutes

Step-by-step explanation:

How long means, we are to calculate the time(t)

Hence,

Speed × time = Distance

For Neil , 11 × t

For Charlie = 9 × t

11t + 9t = 6

20t = 6

t = 6/20

t = 0.3 hour

Converting to minutes

1 hour = 60 minutes

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Therefore, it will take 0.3 hour or 18 minutes for these two to meet.

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3 years ago
Drag each tile to the correct box.
Zielflug [23.3K]

The amount of heat depends on three factors:-

#Mass of the material used in bowls.

#Specific heat capacity of the material used in bowls.

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So, (change in energy) = (mass) x (specific heat capacity) x (temperature change)

Temperature Change = (Change in energy) / (mass x specific heat capacity)

It says "The bowls start at the same temperature, and then the same amount of heat is added to each bowl". It means temperature change varies inversely with product of mass and specific heat capacity.

Higher the product of mass and specific heat capacity, Lower the temperature change, Cooler the bowl will be.

Water’s specific heat capacity is 4.186 joules/gram degree Celsius. Mercury’s specific heat capacity is 0.140 joules/gram degree Celsius.

Water and mercury are put into three identical bowls:

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#Bowl C contains 20 grams of mercury.

So, we have (40g x 4.186 J/g) > (20g x 4.186 J/g) > (20g x 0.140 J/g)

It means temperature change in <u>Bowl B < Bowl A < Bowl C.</u>

<u>Hence, Order of the bowls from coolest to warmest, based on their final temperatures would be</u><u> Bowl B < Bowl A < Bowl C.</u>

6 0
3 years ago
a moving company charges $800 plus $16 per hour. Another moving company charges $720 plus $21 per hour. for a job of how many ho
nirvana33 [79]
800+16x=720+21x
80+16x=21x
80=5x
X=16
So 16 hours :)
3 0
3 years ago
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