1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
LenKa [72]
3 years ago
8

PLEASE HELP/ANSWER! From 1980 to 1990, Lior’s weight increased by 25%. If his weight was k kilograms in 1990, what was it in 198

0?
Mathematics
1 answer:
Elena-2011 [213]3 years ago
7 0

The weight in 1980 is \frac{4k}{5} kilograms

<em><u>Solution:</u></em>

From 1980 to 1990, Lior’s weight increased by 25%

His weight is "k" kilograms in 1990

<em><u>To find: weight in 1980</u></em>

This is a percentage increase problem

Let "x" be the weight in kilograms in 1980

<em><u>The percentage increase is given by formula:</u></em>

\text{Percentage increase } = \frac{\text{Final value - initial value}}{\text{initial value}} \times 100

Here,

Initial value in 1980 = x

Final value in 1990 = k

Percentage increase = 25 %

<em><u>Substituting the values in formula,</u></em>

25 = \frac{k-x}{x} \times 100\\\\25x = 100(k-x)\\\\x = 4(k-x)\\\\x = 4k - 4x\\\\5x = 4k\\\\x = \frac{4k}{5}

Thus the weight in kilograms in 1980 is \frac{4k}{5}

You might be interested in
Hi please help me answer this!!
just olya [345]

The numbers that are irrational are B. √72 and D.√23.

<h3>What are irrational numbers?</h3>

Irrational numbers are those that have infinite numbers after the decimal. These numbers are also none repeating.

When the above are solved:

√25 = 5

√144 = 12

√23 = 4.79583152331...

√72 = 8.48528137424...

The only two numbers with non-repeating and infinite numbers are √72 and √23.

Find out more on irrational numbers at brainly.com/question/20400557

#SPJ1

7 0
1 year ago
A sample of 7 students was taken to see how many pencils they were carrying 2,3,2,5,7,1,4 calculate the standard deviation
Firdavs [7]

Answer:

1.92

Step-by-step explanation:

6 0
3 years ago
The difference between two same-side interior angles of two parallel lines is 35 degrees. Find the measures of these two angles.
Leona [35]

Answer:

angle 1:    72.5°

angle 2:   107.5°

Step-by-step explanation:

x + y = 180

x - y = 35         ===>      x = 35 + y

Substitution to find angle y:

  x + y = 180

  (35 + y) + y = 180

  35 + 2y = 180

  2y = 145

  y = 72.5

Substitution to find angle x:

  x = 35 + y

  x = 35 + (72.5)

  x = 107.5

4 0
3 years ago
Read 2 more answers
what are the hypotheseses for the global test of the multiple regression model with three independent variables
harkovskaia [24]

Answer:

Step-by-step explanation:

For a multiple regression model with 3 independent variables,

Y = A0 + A1X1 + A2X2 + A3X3

The hypotheses for the global test of a multiple regression model are:

Null hypothesis H0: there is no relationship between the slopes - A1, A2, A3 - and the outcome. A1, A2, A3 = 0; R^2 = 0

Alternative hypothesis H1: there is a relationship between at least one of the slopes and the outcome. One of A1, A2, A3 is not equal to zero. R^2 is not equal to zero.

7 0
3 years ago
The lock is numbered from 0 to 49. Each combination uses three numbers in a right, left, right pattern. Find the total number of
kifflom [539]
If I'm not wrong, it would be 147 combinations because 49*3=147
5 0
3 years ago
Other questions:
  • at the start of the shift your part counter reads 250 at the end of the shift the part counter reads 1075 how many parts did you
    7·1 answer
  • Please help!!! Make a box ­and ­whisker plot of the data.  24,18,29,21, 16,23,13,11 
    15·2 answers
  • What is the slope of the line that passes through (4, 3) and (5, -1).
    14·1 answer
  • What is solution to the system of equations? Y=5×+2 3×=-y+10
    6·1 answer
  • Wat is equal to 7.5x4 what is equal to 7.5 * 4
    15·1 answer
  • Write the equation of the circle P graphed below.
    15·1 answer
  • In the figure, x:y = 2:3 and y:z = 3:5. If x = 10, find the value of z. 15 20 25 30
    6·1 answer
  • What’s 2 +2x7x8+3x78=?
    14·1 answer
  • 5x/7-5=50 plsssssssssss noBOTS
    6·2 answers
  • PLS SHOW FULL STEP .................
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!