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2 years ago

The sum of two numbers is 28. One number is 4 less than the other. What are the two numbers?

Mathematics

1 answer:

shepuryov [24]2 years ago

5 0

Answer:

12 and 16

Step-by-step explanation:

set up an equation:

since one number is 4 less than the other, let x represent it. for the other number, let x+4 represent it since it's 4 greater than x. set the equation equal to 28 because the sum of the two numbers is 28.

x+x+4=28

now, we solve the equation:

x+x+4=28

2x+4=28

2x=24

x=12.

Since x equals 12, to find the other number, which would be 4 greater than x, we would add:

12+4=16

So, the two numbers are 12 and 16.

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Thomas decides on a destination for his vacation. If he takes the train there, it will take 5 1/8 hours to get there. If he take

Allisa [31]

Answer: 2 11/24

Step-by-step explanation:

How many hours does the plane save?

Time taken for the train = 5 1/8

Time taken for the plane = 2 2/3

The number of hours saved will then be:

= 5 1/8 - 2 2/3

Let the lowest common multiple be 24

= 5 3/24 - 2 16/24

= 2 11/24

The number of hours saved by the plane will be 2 11/24

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2 years ago

4. What is 54 + (-78) - (-39)

inysia [295]

Answer:

Step-by-step explanation:

follow the Pemdas order of operations

add and subtract (left to right)

apply the rule +(-a)=-a

+(-78)=-78

=54-78-(-39)

54-78=-24

=-24-(-39)

apply the rule -(-a)=+a

-(-39) =+39

=-24 +39

-24+39=15

=15

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1 year ago

Find an equation of the line(-2,-9) and(-7,-3)

andriy [413]

Answer:

The required equation is 6x+5y+57=0.

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2 years ago

After five years of earning interest at an annual rate of 4%, an interview has earned $1,200 interest.Determine the amount of th

Anna35 [415]

"an interview has earned $1200 in interest?" Perhaps you meant, "A certain individual..."

i = p* r* t
$1200
$1200 = p*(0.04)(5) => p = ----------- = $6000 (answer)
0.20

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3 years ago

Read 2 more answers

The weight W of an object varies inversely as the square of the distance d from the center of the earth. At sea level (3978 mi

eimsori [14]

$\bf \begin{array}{llllll}
\textit{something}&&\textit{varies inversely to}&\textit{something else}\\ \quad \\
\textit{something}&=&\cfrac{{{\textit{some value}}}}{}&\cfrac{}{\textit{something else}}\\ \quad \\
y&=&\cfrac{{{\textit{k}}}}{}&\cfrac{}{x}
\\
&&y=\cfrac{{{ k}}}{x}
\end{array}$

with "k" being the "constant of variation"

so. hmm in this case is "w" inversely varying to the square of the distance or d²

thus $\bf w=\cfrac{k}{d^2}\qquad 
\begin{cases}
d=3978\\
w=129
\end{cases}\implies 129=\cfrac{k}{3978^2}$

solve for "k", to see what the constant of variation is

and plug it back in $\bf w=\cfrac{k}{d^2}$

now.. .to find her weight when she's 144miles above the surface, well
that's just $\bf w=\cfrac{k}{(3978+144)^2}$

and since you already know what "k" is, just divide and simplify away, to get "w"

7 0

2 years ago