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MrRa [10]
3 years ago
12

A line passes through the points (2,-2) and (-6, 2). The point (a, -4) is also one the line. What is the value of a

Mathematics
2 answers:
artcher [175]3 years ago
6 0

Answer:

D: 6

Step-by-step explanation:

I took the test :)

V125BC [204]3 years ago
3 0

Answer:

b

Step-by-step explanation:

1

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Find the distance between these points: (-3, 8) and (-5,1)
irina1246 [14]

Answer:

7.28011

Step-by-step explanation:

X1 =-3

X2 =-5

Y1 =8

Y2 =1

Distance Formula = √(X2-X1)²+ (Y2-y1)²

Step 1. calculate (X2-X1)²

(-5 - -3)2 = 4

Step 2. calculate (Y2-Y1)²

(1 - 8)2 = 49

Step 3. calculate √4 + 49

                = 7.28011

5 0
3 years ago
What is the equivalent exxpression of 8b+8-4b-3
sergiy2304 [10]
8b + 8 - 4b - 3

Combine like terms:-

(8-4)b + 8 - 3
4b + 8 - 3 
4b + 5 
4 0
3 years ago
What are the roots of the quadratic equation X² + 4X + 4. How many roots are there.
kogti [31]
If we set the equation equal to 0, we can factor it to find its roots:

x² + 4x + 4 = 0
(x + 2)(x + 2) = 0
x = -2

This graph has one root, a double root, at -2.  This means that a single point, which must be the vertex of the parabola, touches the x-axis at (-2, 0)
3 0
3 years ago
I am really confused about this question for math.. any help would be really appreciated:
Elina [12.6K]

y= (\frac 1 4 )^x

A reflection about the x axis, about y=0, is the mapping (x',y')=(x,-y) so

y'= -y = - (\frac 1 4)^{x'}

A dilation of 2 is the mapping (x'',y'')=(2x', 2y')

So

x'=x''/2, y'=y''/2

y''/2= - (\frac 1 4)^{x''/2}

y'' =  - 2((\frac 1 4)^{1/2})^{x''}

y''= - 2(\frac 1 2)^{x''}

We can rewrite that without the primes and combine the powers of 2.

y =  - 2^{1-x}

Let's graph these and see if we're close,

Plot y= (1/4)^x, y= - (1/4)^{x}, y = - 2^{1-x}

6 0
3 years ago
Find the following measure for this figure.
miv72 [106K]
  • l=11
  • r=5

Now

LSA:-

  • πrl
  • π(11)(5)
  • 55πunits ²
4 0
2 years ago
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