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tekilochka [14]
3 years ago
9

Point C has the coordinates (–1, 4) and point D has the coordinates (2, 0). What is the distance between points C and D?

Mathematics
2 answers:
QveST [7]3 years ago
6 0
\bf \textit{distance between 2 points}\\ \quad \\
\begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
%  (a,b)
C&({{ -1}}\quad ,&{{ 4}})\quad 
%  (c,d)
D&({{ 2}}\quad ,&{{ 0}})
\end{array}\qquad 
%  distance value
d = \sqrt{({{ x_2}}-{{ x_1}})^2 + ({{ y_2}}-{{ y_1}})^2}
\\\\\\
CD=\sqrt{[2-(-1)]^2+(0-4)^2}\implies CD=\sqrt{(2+1)^2+(-4)^2}
\\\\\\
CD=\sqrt{9+16}\implies CD=\sqrt{25}\implies CD=5
Tema [17]3 years ago
6 0
Use the distance formula: sqrt[(x1-x2)^2 - (y1-y2)^2]

x1: -1
x2: 2
y1: 4
y2: 0

Answer: 5
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Determine whether the polynomial is a difference of squares and if it is, factor it.
GREYUIT [131]
Remember these three formulas (really, learn these by heart):

{(a + b)}^{2}  =  a^{2} + 2ab +  b^{2}

{(a - b)}^{2} = a^{2} - 2ab + b^{2}

(a + b)(a - b) = a^{2} - b^{2}

The stated formula is a manifestation of the last of these three. So indeed,

(y + 15)(y - 15) = y^{2} - 225



8 0
3 years ago
-10=-14v+14? Not sure
satela [25.4K]
-1.714 is your answer
7 0
3 years ago
Read 2 more answers
HELP!!!!!!!!!! PLEASE!!!!!!!WILL MARK AS BRAINLIEST
Goshia [24]

<t =33 since triangle  RUT is isosceles  (RU = TU)

<r + <u + <t = 180  triangle = 180

33 + <u + 33 = 180

66 + <u = 180

< u =114

<rus = < sut  from the diagram

<rus + <sut = <u

x + x = 114

2x = 114

divide by 2

x = 57

6 0
3 years ago
Read 2 more answers
Mary is spending money at the average rate of $5 per day. After 14 days she has $68 left. The amount left depends on the number
Radda [10]

Answer:

A. Y-68=-5(x-14)

Step-by-step explanation:

Mary is spending money at the average rate of $5 per day. After 14 days she has $68 left. The amount left depends on the number of days that have passed. write an equation for the situation

We find the equation using the point slope equation of a line. This is given as:

y - y1 = m(x-x1)

The slope intercept form will be

y = -5x + b

since the amount decreases by $5 per day...

Our slope is -5 so m=-5

We have a point (x1,y1) = (14, 68)

Hence, we have:

y-68 = -5(x-14)

Option A is correct

4 0
3 years ago
PLEASE HELP!!
Mariulka [41]
2. 3. 5. are correct

1. and 4. are actually interchanged
6 0
4 years ago
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