All categories

3 years ago

Solve the equation:

Mathematics

2 answers:

adelina 88 [10]3 years ago

7 0

Answer:

x=1 is the correct answer

aev [14]3 years ago

6 0

The answer is A because it has many solutions

You might be interested in

Americans who are 65 years of age or older make up 13.2% of the total population. If there at 30.3 million american in this age

zhannawk [14.2K]

Given:

Americans who are 65 years of age or older make up 13.2% of the total population.

Required:

The total u.s. population

Explanation:

Let the total population of u.s be x.

According to the given condition.

$13.2\text{ \% of x = 30.3 billion}$

Therefore,

$\begin{gathered} \frac{13.2}{100}\text{ }\times\text{ x = 30.3} \\ x\text{ = }\frac{30.3\text{ }\times\text{ 100}}{13.2} \\ x\text{ = 229.55 billion} \end{gathered}$

Answer:

Thus the total population of u.s is 229.55 billion.

4 0

1 year ago

On a certain river, a paddleboat travels 12 miles upstream (against the current) in the same amount of time it travels 20 mil

marin [14]

Given :

a paddle boat travels upstream = 12 miles

a paddle boat travels downstream = 20 miles

speed of the current = 2 miles per hour

Let the speed of the boat =x

Let the time taken = t

We know the distance for upstream D= (boat speed - current speed) * time

the distance for downstream D= (boat speed + current speed) * time

Plug in all the values and variables in the distance

For upstream 12 = (x-2)t, then $t = \frac{12}{x-2}$

For downstream 20 = (x+2)t then $t = \frac{20}{x+2}$

we got two equations for t, equate it and solve for x

$\frac{12}{x-2} = \frac{20}{x+2}$

Cross multiply it

12(x+2) = 20(x-2)

12x + 24 = 20x - 40 (subtract 12x and add 40 on both sides)

64 = 8x

x= 8

the speed of the boat in still water = 8 miles per hour

3 0

3 years ago

Read 2 more answers

(-9, -5) and (-1, -9)<br> find the midpoint

irga5000 [103]

Answer:

(-5,-7)

Step-by-step explanation:

6 0

3 years ago

A square of area 36cm is cut out to make two rectangles, which we'll call A and B. The ratio is 2:1 for A: B. Work out the lengt

mr_godi [17]

Answer:

*by length i mean height

Length of A = 6

Width of A = 4

Length of B = 6

Width of B = 2

Step-by-step explanation:

You can approach this question in many different ways, but this is how i did it. I prefer to draw diagrams whenever i can, it just makes it easier, but its your choice what you choose to do.

Since its a square, we know that both the original length and width are 6.

Depending on which way you cut it, either the length or width will stay the same for both rectangles, but you'd still be right. I assumed they were cutting it down the middle, so the length stays 6 for both A and B.

To find the width of A and B:

The width of the square is 6 and i divided that by 3, becauce the ratio is 2:1, which has three "parts" to it (2+1=3).

So now we have 3 parts, each with a width of 2. From the ratio, we know that the width of A has to be double the width of B.

From this i get, width of A = 4 and width of B =2.

If you check this against the ratio 2:1, you'll see its correct because 4:2 simplifies down to 2:1 as well.

* if you want to be extra sure of you answer you can do some trial and error with different values for B and see if it fits the ratio, but theoretically, nothing else should work.

So the final answer is:

Length of A = 6

Width of A = 4

Length of B = 6

Width of B = 2

Hope that helped :)

5 0

3 years ago

Dae opens a credit card with an APR of 19.49% compounded monthly. How much is charged in interest this month if her balance is $

ASHA 777 [7]

Interest charged
1,250×0.1949×(1÷12)
=20.30

3 0

4 years ago