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Ede4ka [16]
2 years ago
7

-x+4= 2x+1 equation steps

Mathematics
2 answers:
kykrilka [37]2 years ago
4 0

-x + 4 = 2x + 1

add x to both sides

4 = 3x + 1

subtract 1 from both sides

3 = 3x

dived 3 from both sides

1 = x

kirza4 [7]2 years ago
3 0

Answer:

Step-by-step explanation: x=3

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Prove the identity.
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Answer:

D. Pythagorean

Step-by-step explanation:

Given the identity

cos²x - sin²x = 2 cos²x - 1.

To show that the identity is true, we need to show that the left hand side is equal to right hand side or vice versa.

Starting from the left hand side

cos²x - sin²x ... 1

According to Pythagoras theorem, we know that x²+y² = r² in a right angled triangle. Coverting this to polar form, we have:

x = rcostheta

y = rsintheta

Substituting into the Pythagoras firnuka we have

(rcostheta)²+(rsintheta)² = r²

r²cos²theta+r²sin²theta = r²

r²(cos²theta+sin²theta) = r²

(cos²theta+sin²theta) = 1

sin²theta = 1 - cos²theta

sin²x = 1-cos²x ... 2

Substituting equation 2 into 1 we have;

= cos²x-(1-cos²x)

= cos²x-1+cos²x

= 2cos²x-1 (RHS)

This shows that cos²x -sin²x = 2cos²x-1 with the aid of PYTHAGORAS THEOREM

5 0
3 years ago
A softball player made a hit 34 times in the last 170 times at bat . Find the probability that the softball player will get a hi
Gennadij [26K]

Answer:

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Step-by-step explanation:

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6 0
2 years ago
What equation represents the relationship between p and q shown in the table
mash [69]

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6 0
2 years ago
Write a compound inequality for the graph shown below.<br> Use x for your variable.
ICE Princess25 [194]

Answer:

wheres your graph?

Step-by-step explanation:

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3 0
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Find the slope of a line that passes through (-2,1) and (4,9)
melamori03 [73]

Answer:

m = 4/3

Step-by-step explanation:

To find the slope of a line use the formula, where "m" means slope:

m=\frac{y_{2}-y_{1} }{x_{2}-x_{1} }

*You don't need to show this part on paper*

Choose which point you want to be point 1 and point 2. Remember the points are written (x, y).

Point 1: (-2, 1)       x₁ = -2  y₁ = 1

Point 2: (4, 9)      x₂ = 4   y₂ = 9

Substitute the coordinates into the formula:

*Show this part on paper*

m=\frac{y_{2}-y_{1} }{x_{2}-x_{1} }

m=\frac{9-1 }{4-(-2) }         Simplify

m=\frac{8 }{6 }                Reduce by dividing by 2

m=\frac{4 }{3 }               Slope

The slope of the line is 4/3

8 0
3 years ago
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