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svetlana [45]
3 years ago
15

Help I don’t get this

Mathematics
1 answer:
UkoKoshka [18]3 years ago
4 0

you need to ask your teacher

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4x + y = 46.75 help!!<br> A 8.50<br> B 8.75<br> C 9.50<br> D12.75
WARRIOR [948]

Answer:

d is the answer

Step-by-step explanation:

3 0
3 years ago
Find an equation for the perpendicular Bisector of the line segment whose endpoints are (-9,-8) and (7,-4
Alina [70]

equation for the perpendicular Bisector of the line segment whose endpoints are (-9,-8) and (7,-4)

Perpendicular bisector lies at the midpoint of a line

Lets find mid point of  (-9,-8) and (7,-4)

midpoint formula is

\frac{x_1+x_2}{2} ,\frac{y_1+y_2}{2}

\frac{-9+7}{2} ,\frac{-8+-4}{2}

midpoint is (-1, -6)

Now find the slope of the given line

(-9,-8) and (7,-4)

slope = \frac{y2-y1}{x2-x1} = \frac{-4-(-8)}{7-(-9)}

slope = \frac{-4+8}{7+9}= \frac{4}{16} =\frac{1}{4}

Slope of perpendicular line is negative reciprocal of slope of given line

So slope of perpendicular line is -4

slope = -4  and midpoint is (-1,-6)

y - y1 = m(x-x1)

y - (-6) = -4(x-(-1))

y + 6 = -4(x+1)

y + 6 = -4x -4

Subtract 6 on both sides

y = -4x -4-6

y= -4x -10

equation for the perpendicular Bisector y = -4x - 10


3 0
3 years ago
I REALLY NEED HELP I FORGOT HOW TO DO THIS :(
Elena-2011 [213]

Answer:

117.8

Step-by-step explanation:

i used heron's formula

√s(s-a)(s-b)(s-c)

s= (20+16+33)/2 = 34.5

√34.5(34.5-20)(34.5-16)(34.5-33)

= 117.8

3 0
2 years ago
Angle a​ and​ ​angle b​ ​are complementary angles. The measure of ∠a is 42°.
Citrus2011 [14]
My work to your question
8 0
3 years ago
Determine the average rate of change<br> between x=-1 and x=1.
Olegator [25]

Answer:

2

Step-by-step explanation:

5 0
3 years ago
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