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andrey2020 [161]
3 years ago
15

Given polygon ABCD with coordinates A(-2,1),B(0,3),C(1,-4),D(-1,-1), if polygon ABCD is rotated 90 degree angle counterclockwise

about the origin,then the coordinates of point A’are
Mathematics
1 answer:
AVprozaik [17]3 years ago
4 0

I dont know sorry man

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Write an equation of a line containing (2, -3) and perpendicular to 3x+4y=14 answer
Sergio039 [100]

Answer:

Step-by-step explanation:

From the condition of perpendicularity, if two lines must be perpendicular to each other, the product of their gradient rather the slope must be equaled to ( -1 ).

Equation of a line ; y = mx+ c, where m1 is the gradient of the line and c us the point of intersection if the line on the y- axis.therefore, the equation

3x + 4y = 14, when re arranged, now becomes, 4y = -3x + 14, divide through by 4, gives, y = -3x/4 + 14.

Therefore, m1, = -3/4 and m2, = 4/3 going by the condition. Since the line passes through the coordinate of (2,3), where x = 2, and y = -3, then, substitute for x and y in y = mx+ c, minding the m2, to find C, therefore,

-3 = 4/3x2 + c. -3 = 8/3 +c

Multiply through by 3 to make it a linear equation,

-9 = 8 + 3c; -9 - 8 = 3c, -17= 3c

c = -17/3.Now substitute for c in the equation ,y = mx+ c, the equation now becomes, y = 4x/3 - 17/3. Therefore the new equation is

3y = -4x - 17.

7 0
3 years ago
Have another question for you guys it is in the image
Lerok [7]

Answer:

A because its supposed to be on the y axis

5 0
3 years ago
A human hair is approximately 40 microns (um) wide. If 1 um is equal to 10
Natasha2012 [34]

Answer:

D 40,000nm

Step-by-step explanation: 1nm/10^-9m * 10^-6/1um = 10^3 nm/um

Therefore in 40 microns there are:

40um * 10^3 nm/um = 40 * 10^3 nm = 40,000 nm

5 0
2 years ago
a class consists of 10 boys and 5 girls. how many ways can a committee of 3 boys and 2 girls be selected
hammer [34]

Answer:

<em>i dont know the answer dude or ladies</em>

Step-by-step explanation:

\

8 0
3 years ago
A grapefruit is 8% heavier than an orange, and an apple is 10% lighter than the orange.
qwelly [4]
A = 0.9 o 
<span>so, </span>
<span>o = a/0.9 = 1.111a </span>
<span>so, the orange is 11% heavier than the apple. 

glad i could help(:</span>
6 0
3 years ago
Read 2 more answers
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