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GrogVix [38]
3 years ago
11

Will yall help me pleaseee! I need this turned in today donttake my points :'( this is Pythagorean Math !!!!

Mathematics
1 answer:
LenaWriter [7]3 years ago
5 0

Answer:

1. 7.6 = c

2. 45 = c

Step-by-step explanation:

1. 3^2 + 7^2 = c^2

9 + 49 = c^2

58 = c^2

square root both sides = 7.6 = c

2. 27^2 + 36^2 = c^2

729 + 1296 = c^2

2025 = c^2

square root both sides

c = 45

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3 0
3 years ago
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How do i do x/3=3 Please help!! thanks!!
Shkiper50 [21]
If you're looking for "x"

x/3 = 3
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6 0
3 years ago
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What is the equation of the quadratic graph with a focus of (3, 1) and a directrix of y = 5?
telo118 [61]

Answer:

f(x)=-\frac{1}{8}(x-3)^2+3

Step-by-step explanation:

We want to find the equation of the parabola with a focus of (3,1) and directrix y=5.

Considering the directrix, the quadratic graph must open downwards.


The equation of this parabola is given by the formula,

(x-h)^2=4p(y-k), where (h,k) is the vertex of the parabola.


The axis of this parabola meets the directrix at (3,5).

Since the vertex is the midpoint of the focus and the point of intersection of the axis of the parabola and the directrix,


h=\frac{3+3}{2}=3 and k=\frac{5+1}{2}=3.


The equation of the parabola now becomes,


(x-3)^2=4p(y-3).


Also |p| is the distance between the vertex and the directrix.


|p|=2


This implies that p=-2\:or\:2.


Since the parabola turns downwards,


p=-2.



Our equation now becomes,


(x-3)^2=4(-2)(y-3).


(x-3)^2=-8(y-3).


We make y the subject to get,

y=-\frac{1}{8}(x-3)^2+3).


This is the same as

f(x)=-\frac{1}{8}(x-3)^2+3).









4 0
3 years ago
If Sin x = -¼, where π < x < 3π∕2 , find the value of Cos 2x
Sliva [168]

Answer: 7/8

Cos2x has 3 formulas, Sinx is given in the question, we should use the formula with sinus. I guess that's the solution.

5 0
3 years ago
-7a-10=20-3a please show work help
olga_2 [115]
-7a-10=20-3a

Combine like terms:
-4a -10 = 20
-4a = 30

Solve for a:
a =  -\frac{30}{4} = -7.5

Your answer: a = -7.5
7 0
4 years ago
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