4 years ago

Chen check the temperature at Dawn and at dusk every day for a week for a science project. How many observations does he make?

Mathematics

2 answers:

lesantik [10]4 years ago

5 0

14 times Chen checks it

salantis [7]4 years ago

4 0

Chen checked the temperature 14 times at dawn and at dusk

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Two pencils and a ruler cost 98 cents in total. One pencil and 2 rulers cost $1.24 in total. Find the cost of each item.

salantis [7]

Answer:

2.16

Step-by-step explanation:

r = cost of ruler

p = cost of pencil

r = 2p

6r + 15p = 2.16

Substitute 2p in place of r in 2nd equation and solve for p

6(2p) + 15p = 2.16

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A car took 6 minutes to travel between two stations that are 3 miles apart find the average speed of the car in mph

Vesna [10]

Answer: 30 mph is the answer.

Step-by-step explanation:

s = 3 miles

t = 6 minutes

so,

60 minute = 1 hour

1 minute = 1/60 hour

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3 years ago

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Which of the following expressions represents the least common multiple of 15, 18, and 25?

Virty [35]

Answer:

$(2)(3^2)(5^2)$

Step-by-step explanation:

we know that

The <u>Least Common Multiple</u> (LCM) of a group of numbers is the smallest number that is a multiple of all the numbers.

we have

15,18 and 25

Decompose the numbers in prime factors

$15=(3)(5)$

$18=(2)(3^2)$

$25=(5^2)$

Multiply common and uncommon numbers with their greatest exponent

The LCM is equal to

$LCM=(2)(3^2)(5^2)$

$LCM=450$

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3 years ago

3×+9=25-25 cuanto es

Murljashka [212]

Answer:

17 17^2 = 289

Step-by-step explanation:

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1. Which of the following equations would NOT contain the point (4,12)?

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Answer:

the answer is b hope this helps :)

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