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3 years ago

The Difference between two numbers is 22. The sum of the same two numbers is 78. What are the two numbers?

Mathematics

1 answer:

jenyasd209 [6]3 years ago

3 0

Answer:

50 and 28

Step-by-step explanation:

x+y=78

x-y=22

to find this, subtract 22 from 78 to get 56

divide 56 by 2 to get 28

y=28

add 22 to 28 to get 50

x=50

to double check add 50 and 28 to get 78

also subtract 28 from 50 to get 22

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Two trains left the station traveling in opposite directions. The distance Train A traveled is modeled by the function d(t)=81t

stira [4]

Answer:

Option A - The distance Train A traveled in 1 h is equal to the distance Train B traveled in 1 h.

Step-by-step explanation:

Given : The distance Train A traveled is modeled by the function $d(t)=81t$

where d represents distance in miles and t represents time in hours.

To find : How does the distance Train A traveled in 1 hour compare to the distance Train B traveled in 1 hour?

Solution :

Distance traveled by Train A in 1 hour is

$d(t)=81t$

$d(t)=81(1)=81$

Distance traveled by Train B in 1 hour is

$d(t)=81t$

$d(t)=81(1)=81$

or for B, we have 324 miles in 4 hours. If that is at a constant speed, it travels 324/4 = 81 miles in one hour

Therefore, The distance Train A traveled in 1 h is equal to the distance Train B traveled in 1 h.

Hence, Option A is correct.

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3 years ago

Which system of inequalities is shown?

anzhelika [568]

Answer:

Option C

Step-by-step explanation:

from the graph: y<4

so option A and B are wrong.

also if we choose any points in the area, always x will be bigger than y. so x>y

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3 years ago

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3 years ago

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natita [175]

Answer:

Step-by-step explanation:

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Read 2 more answers

In February, Paul's electric bill was three dollars more than one-half his gas bill. If the electric bill was ninety-two dollars

Lostsunrise [7]

Let us assume the gas bill of Paul in February = x dollars
Then
Electric bill of Paul for the month of February = (x/2) + 3
Amount of Electricity bill of Paul for the month of February = $92
then we can write the equation as
(x/2) + 3 = 92
x/2 = 92 - 3
x/2 = 89
x = 89 * 2
= 178 dollars
So the gas bill of Paul in February is $178. I hope this is the answer you were looking for.

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3 years ago