All categories

3 years ago

John's income increased by 4%. if his income rose by $850, find his previous amount

Mathematics

2 answers:

prisoha [69]3 years ago

6 0

Answer:

$21250

Step-by-step explanation:

x- previous amount

4% of x = $850

0.04x=$850

x= $850/0.04

x=$21250

bearhunter [10]3 years ago

3 0

Answer:

$21,250

Step-by-step explanation:

4% = 850

100% = x

Cross multiply the above to get 21,250

Another way of doing this is:

850 divided by 4 = 212.5

So every percent is equal to 212.5, so:

212.5 * 100 (for 100%) = 21,250

You might be interested in

Mandy is building a rectangular garden pond with the area of 12ft^2. The length of pool needs to be 2 ft more than twice the wid

Genrish500 [490]

The length of rectangular pool is 6 ft and width of rectangular pool is 2 ft.

Step-by-step explanation:

Given,

Area of rectangular pool = 12 square feet

Let,

Width of pool = w

Length of pool = l = 2w+2

Area = Length * Width

$12=(2w+2)*w\\12=2w^2+2w\\2w^2+2w-12=0$

Dividing each term by 2;

$\frac{2w^2}{2}+\frac{2w}{2}-\frac{12}{2}=0\\w^2+w-6=0\\w^2+3w-2w-6=0\\w(w+3)-2(w+3)=0\\(w+3)(w-2)=0\\$

Either,

w+3 = 0 => w=-3

Or,

w-2=0 =>w=2

As width cannot be negative, therefore,

Width of rectangular pool = 2 ft

Length of rectangular pool = 2w+2 = 2(2)+2 = 4+2 = 6 ft

The length of rectangular pool is 6 ft and width of rectangular pool is 2 ft.

Keywords: rectangle, area

Learn more about areas at:

#LearnwithBrainly

7 0

3 years ago

Steve is buying a sandwich for lunch and some fresh fruit juice for his friends. The sandwich costs $3.92 and the fruit juice co

Svetradugi [14.3K]

Answer:

Step-by-step explanation

2+2-4

4 0

4 years ago

The chain of custody, along with evidence tagging and labeling is an example of what?

olchik [2.2K]

Answer:Evidence Collector is the answer . It is the chain of custody used in proper methods for documenting evidence

Step-by-step explanation:

8 0

3 years ago

What is the solution to the system of equations? Use any method. {y=−3x+1 {2x+5y=18

Softa [21]

Answer:

So the solution set of the equations are {(-1,4)}

the solution is x = -1 and y = 4

Step-by-step explanation:

Equations given to us are

y = -3x + 1 ..................(i)

2x + 5y = 18 .................(ii)

To find the value of x and y or the solution set of the system of equations

Now in first equation we see that

y = -3x + 1

Putting this value in equation (ii)

which is

2x + 5y = 18

Putting value of y from (i) in it

2x + 5(-3x + 1) = 18

Opening the bracket and multiplying inside

2x -15x + 5 = 18

-13 x + 5 = 18

Subtracting 5 from both sides of the equation

-13x + 5 - 5 = 18 -5

-13x = 13

Dividing both sides by -13

$\frac{-13x}{-13}=\frac{13}{-13}$

Cutting out the same values gives us

x = -1

For value of y

putting value of x in equation (i)

which is

y = -3x + 1

Putting the value

y = -3(-1)+1

y=3+1

y=4

So the solution set of the equations are {(-1,4)}

the solution is x = -1 and y = 4

4 0

4 years ago

If a dozen exercise books cost 144, what will 14 of the same books cost

Aleksandr-060686 [28]

168

So you take the 144 divide 12(the dozen) so we could find how much 1 cost, it was 12. You added 2 more books so we add(12x2)+(144). That equals to 168

Hope this helps!

8 0

3 years ago

John's income increased by 4%. if his income rose by $850, find his previous amount​

John's income increased by 4%. if his income rose by $850, find his previous amount