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jasenka [17]
2 years ago
13

The price of a washing machine was decreased by 20% to £640.

Mathematics
1 answer:
larisa [96]2 years ago
7 0
800 because 80% of 800 is 640
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Complete the square to rewrite the following equation. Identify the center and radius of the circle. You must show all work and
Sliva [168]

Answer:

( x+1)^2  + (y+2)^2 = 25

The center is (-1, -2) and the radius is 5

Step-by-step explanation:

x^2 + 2x + y^2 + 4y = 20

Complete the square

2/2 =1  1^2 =1  so add 1 for x     4/2 =2  2^2 = 4 so add 4 for y

x^2 +2x +1   +y^2 +4y+4 = 20 +1 +4

( x+1)^2  + (y+2)^2 = 25

(x+1) ^2 + (y+2)^2 = 5^2

(x - -1) ^2 + (y -  -2)^2 = 5^2

This is in (x-h)^2 + (y-k)^2 = r^2 form where (h,k) is the center and r is the radius

The center is (-1, -2) and the radius is 5

4 0
3 years ago
A 10 meter ladder was placed on an angle. The base of the ladder is 5 meters away from the
Olenka [21]

Answer:

5^2 + h^2 = 10^2

Step-by-step explanation:

This is a clear example of the Pythagorean Theorem, a relation of all sides in a right triangle. The equation itself is a^2 + b^2 = c^2. By simply plugging in the given values into the triangle, you would get the answer.

4 0
3 years ago
Read 2 more answers
Use slopes and y-intercepts to determine if the lines 5x-5y=-2 and -x+2y=4
HACTEHA [7]

The given pair of lines are not perpendicular.

<h3>What is a line?</h3>

The line is a curve showing the shortest distance between 2 points.

5x - 5y = -2 - - - - - (1)
Transform the equation into standard form,
5x + 2 = 5y
y = 5x /5 + 2/5
y = x + 2/5


The slope of equation 1 is m_1 = 1  and intercept c = 2 / 5


Similarly
x + 2y = 4    - - - - - - - -(2)
Transform it into standard form
y = -x/2 + 4 /2
y = -x / 2 + 2


Slope of the equation 2  m_2= -1 / 2 and intercept c = 2
Slope of line 1 * slope of line 2 = 1 * -1/2 = -1/2


Since the lines are not perpendicular because the pair of lines does not satisfy the property of perpendicular lines i.e
m_1*m_2 = -1

Thus, the given pair of lines are not perpendicular.

Learn more about lines here:

brainly.com/question/2696693

#SPJ1  

6 0
1 year ago
A fraction where the numerator is smaller than the denominator
Anit [1.1K]

Answer:

Step-by-step explanation:

A fraction where the numerator is smaller than the denominator is called proper fraction e.g 2/3,4/7 etc

8 0
3 years ago
Yall can someone plz do this for me I would really appreciate it I'll give all of my points
ycow [4]

bjubjbjbjujvgjv gbv hvhbb hbjhnhubhvgcf fgc vvhvghvhbv b n hgctgcfxrfxtygyhbhjkbmk

6 0
3 years ago
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