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Montano1993 [528]
3 years ago
13

A 100-meter-long christmas train needs 30 seconds to cross a 400-meter-long bridge. assuming the train goes at a steady speed, h

ow fast is it?
Mathematics
1 answer:
san4es73 [151]3 years ago
8 0
Length of train : 100
length of bridge : 400
distance covered by the train to cross the bridge : (100 + 400) = 500
time taken by the train to cross : 30

speed = distance / time
speed = 500/30
speed = 16.67 meters per second <===
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the concrete slab under a garage measures 38 feet by 37 feet and is 6 inches thick. if concrete costs 150$ for a cubic yard, how
Natalka [10]
STEP 1
find cubic feet; multiply the three dimensions together; be sure to use the same unit of measure for all three dimensions: 6 inches is equal to 1/2'.

= 38' * 37' * 1/2'
multiply

= 703 cubic feet


STEP 2
divide cubic feet in step 1 by number of cubic feet in a cubic yard

27 cubic feet= 1 cubic yard

= 703 ÷ 27
= 26.037 cubic yards


STEP 3
multiply cubic yards in step 2 by cost per cubic yard

= 26.037 * $150
= $3,905.555
= $3,906 rounded to nearest dollar


ANSWER: It will cost $3,906 (rounded to nearest dollar).

Hope this helps! :)
3 0
3 years ago
Read 2 more answers
3. Which temperature during the week is the closest to 0? Explain how you decided this using absolute value.
Katen [24]

Answer:

The closest temperature to zero during the week is -0.5 °F because it's absolute value, 0.5, is smaller than the other numbers.

The farthest temperature from zero during the week is 5 °F because it's absolute value, 5, is the highest out of all the other numbers.

Answer: The coldest temperature would be -4 °F, because it is the farthest number on the left side of zero on the number line.15-May-2020

The warmest temperature would be 5 °F, because it is the farthest number on the right side of zero on the number line.

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Abigail has 16 apples she eats 2 apples per day.let y be the apples remaining as a function of the number of week,x
Greeley [361]

Answer:

Let X be the number of weeks.

2x - 16 = 14

   we add 16 on both sides.

2x = 30

now we divide 2 on both sides to get rid of the 2 to the x, we want to get x on its own.

X = 15

3 0
3 years ago
What is 5/9 divided by 5 ?
SpyIntel [72]

Answer:

5/45 or 1/9 simplified

3 0
3 years ago
What us the intercept form of (1,2) and (4,-4)
lutik1710 [3]

first you need to find the slope (m) using y2-y1/x2-x1.

-4-2/4-1= -6/3=-2

m=-2

then plug into the intercept form formula: y-y1=m(x-x1)

y-2=-2(x-1)

5 0
3 years ago
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