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arsen [322]
3 years ago
13

80 is 5 percent of what number​

Mathematics
2 answers:
Yakvenalex [24]3 years ago
6 0

Answer:

1600.

Step-by-step explanation:

5 % = 0.05.

Let the number be x then

0,05x = 80

x = 80/0.05

= 8000/5

= 1600.

Arisa [49]3 years ago
5 0
1600.
I do the math a bit differently. I actually take 80 and multiply it by 20 because 5 goes into 100 20 times.
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I NEED HELP !!!!!!!!!
marissa [1.9K]

Answer:

b

d

e

Step-by-step explanation:

the standar form is

ax^{2} +bx+c=0

so it's

0.5x^{2} -3.2x+5.8=0\\\\-x^2-3x+20=0\\\\\frac{1}{2}x^2+4x-3=0\\\\

only that

7 0
3 years ago
The total cost f(x), in dollars, for renting a vacation house for x days is shown:
MA_775_DIABLO [31]

Answer:

Option D.The number of dollars it costs to rent the house for 10 days

Step-by-step explanation:

we have

f(x) -----> the total cost for renting a vacation house

x ------> the number of days rented

we know that

f(x)=10+250x

so

For x=10 days

substitute in the function

f(10)=10+250(10)=$2,510

f(10) represent the number of dollars it costs to rent the house for 10 days

3 0
2 years ago
Read 2 more answers
the bus bound for northtown departs every 15 minutes and the bus for eastown departs every 18 minutes from the central station.
USPshnik [31]

Considering the least common factor of 15 and 18, it is found that they will depart from the central station at the same time at 11 AM.

<h3>How to find the time it takes for periodic events to repeat at the same time?</h3>

To find the time that passes between the events happening at the same time, we need to find the least common multiple of the periods.

In this problem, the periods are of 15 and 18, hence their lcm is found as follows:

15 - 18|2

15 - 9|3

5 - 3|3

5 - 1|5

1 - 1

Hence:

lcm(15,18) = 2 x 3 x 3 x 5 = 90 minutes.

They will depart from the central station at the same time in 90 minutes from 9:30 AM, hence at 11 AM.

More can be learned about the least common factor at brainly.com/question/16314496

#SPJ1

7 0
1 year ago
The sum of three numbers is 26. Twice the first minus the second is the third less 2. The third is the second minus 3 times the
Agata [3.3K]

Let a, b, c represent the three numbers. The problem statement gives rise to three equations:

  • a +b +c = 26
  • 2a -b = c -2
  • -3a +b = c

Adding the first two equations gives

... (a +b +c) +(2a -b) = (26) +(c -2)

... 3a +c = 24 +c . . . . . simplify

... 3a = 24 . . . . . . . . . . subtract c

... a = 8 . . . . . . . . . . . . divide by 3

Adding the second and third equations gives ...

... (2a -b) +(-3a +b) = (c -2) +(c)

... -a = 2c -2 . . . . simplify

... -6 = 2c . . . . . . add 2, substitute for a

... -3 = c . . . . . . . . divide by 2

Using the third equation we can find b.

... -3·8 +b = -3 . . . . substitute for a and c

... b = 21 . . . . . . . . .add 24

The numbers are 8, 21, -3.

_____

The method above is sort of "ad hoc", taking advantage of the numbers in this particular set of equations. You can use more formal methods of Gaussian elimination or Cramer's Rule to solve these by just following a procedure. Or, your graphing calculator can do it for you.

6 0
3 years ago
Simplify the expression 14 + 5(x+3)-7
Alenkasestr [34]
14 + 5(x+3)-7
14 + 5x +15 -7
5x + 22
8 0
3 years ago
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