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Mars2501 [29]
3 years ago
14

Find 2 equivalent fractions for each of the following:

Mathematics
1 answer:
valentinak56 [21]3 years ago
6 0
4 and 5 are equivalent
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A train leaves Philadelphia at 2:00 PM. A second train leaves the same city in the same direction at 4:00 PM. The second train t
polet [3.4K]

Answer: First train speed shall be 42 mi/hr

Second train speed shall be 84 mi/hr

Yes it is the valid answer, it gets annoying when almost everyone enters the wrong answer for a good laugh. Either way, hope this helps! Have a spectacular day.

Step-by-step explanation:

What is the 1st train's head start in miles?

Let +s+ = the speed of the 1st train in mi/hr

From 2PM to 4PM is 2 hrs

+d%5B1%5D+=+s%2A2+

---------------------

Let +d+ = distance the 2nd train travels until

it overtakes the 1st train

From 4PM to 6PM is 2 hrs

Start time when the 2nd train leaves

---------------------

Equation for 1st train:

(1) +d+-+2s+=+s%2A2+

Equation for 2nd train:

(2) +d+=+%28+s%2B42+%29%2A2+

--------------------

Substitute (2) into (1)

(1) +%28+s%2B42+%29%2A2+-+2s+=+s%2A2+

(1) +2s+%2B+84+-+2s+=+2s+

(1) +2s+=+84+

(1) +s+=+42+

and

+s%2B+42+=+42+%2B+42+

+s+%2B+42+=+84+

------------------

The 1st train's speed is 42 mi/hr

The 2nd train's speed is 84 mi/hr

---------------------------

check:

(2) +d+=+%28+s%2B42+%29%2A2+

(2) +d+=84%2A2+

(2) +d+=+168+

and

(1) +d+-+2s+=+s%2A2+

(1) +d+-+2%2A42+=+42%2A2+

(1) +d+=+84+%2B+84+

(1) +d+=+168+

8 0
2 years ago
Find the perimeter of the rectangle? Needs to be in standard form
vladimir2022 [97]

Answer:

<u>6b - 4a + 22 units</u>

Step-by-step explanation:

Perimeter = 2(length + width)

= 2(3b - 4a + 5 + 6 + 2a)

= 2(3b - 2a + 11)

= <u>6b - 4a + 22 units</u>

4 0
2 years ago
Someone please help!!!!
natali 33 [55]
H<-12

6*-2=-12
Flip the sign and it equals
h<-12
8 0
3 years ago
Read 2 more answers
If f(x)= x2 and g(x)= x + 6, find g(10)).
Delicious77 [7]

Answer:

Step-by-step explanation:

g(10) = 10+6 = 16

g(f(10)) = f(10) +6 = 10^2 + 6 = 106 ...

i think it s what you wwant to ask

7 0
3 years ago
Read 2 more answers
10÷7(19+28)×20÷6=???​
Snezhnost [94]

Answer:

109 2/3

Step-by-step explanation:

10 / 7(47) x 20 / 6 =

10 / 329 x 20 / 6 =

32.9 x 20 / 6 =

658 / 6 =

109 2/3

Hope that helps!

6 0
3 years ago
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