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3 years ago

a machine takes 4.8 hours to make 8 parts. At that rate, how many parts can the machine make in 24.8 hours?

1 answer:

8 0

The machine can make 48 parts in 24.8 hours because if you times 4.8 times 5 you will get 24 but you need 24.8 so you would have to go up one more number which will be 6. After that you will need to times 6 and 8 to get the numbers of parts which is 48 but you can also count up 2 because 1 hr the machine can make 2 parts.

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Answer: c

Step-by-step explanation:

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2 years ago

3). AFTER PAYING HER BILLS CAROL HAS -$45 IN HER CHECKING

bazaltina [42]

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2 years ago

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Answer:

k = 8

Step-by-step explanation:

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3 years ago

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Klio2033 [76]

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Step-by-step explanation:

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2 years ago

Y=x+1 and y=-x-3 in graphing,Substitution,and elemination

marysya [2.9K]

$\left\{\begin{array}{ccc}y=x+1\\y=-x-3\end{array}\right\\\\GRAPHING\ \text{(look at the picture)}\\\\y=x+1\\for\ x=0\to y=0+1=0\to(0,\ 1)\\for\ x=-1\to y=-1+1=0\to(-1,\ 0)\\\\y=-x-3\\for\ x=0\to y=-0-3=-3\to(0,\ -3)\\for\ x=-3\to y=-(-3)-3=0\to(-3,\ 0)\\\\Solution:\ (-2,\ -1)$

$SUBSTITUTION\\\\\left\{\begin{array}{ccc}y=x+1\\y=-x-3\end{array}\right\\\\\text{substitute}\ y=-x-3\ \text{to the first equation}\\\\-x-3=x+1\ \ \ \ |+3\\-x=x+4\ \ \ \ |-x\\-2x=4\ \ \ \ |:(-2)\\x=-2\\\\\text{substitute the value of x to the second equation}\\\\y=-(-2)-3=2-3=-1\\\\Solution:\ (-2,\ -1)$

$ELIMINATION\\\\\underline{+\left\{\begin{array}{ccc}y=x+1\\y=-x-3\end{array}\right}\ \ \ |\text{add both sides of the equations}\\.\ \ \ \ 2y=-2\ \ \ \ |:2\\.\ \ \ \ \ \ y=-1\\\\\text{put the value of y to the first equation}\\\\-1=x+1\ \ \ \ |-1\\x=-2\\\\Solution:\ (-2,\ -1)$

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3 years ago