3 years ago

The diagram below shows a pair of congruent traingles, with . Which statement must be true?

Mathematics

1 answer:

Alecsey [184]3 years ago

3 0

What’s the diagram???

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A train travels 220 miles in 4 hours. What is the train's speed in feet per minute?

Katena32 [7]

220 miles in 4 h = 55 mph multiply this by 5280 to get feet per hour then divide this by 60 to get ft/min

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3 years ago

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2) f(x) = x2 - 6x +11<br> Degree:<br> Lead Coefficient:<br> End behavior:

Bad White [126]

Answer:

13 - 6 x

Step-by-step explanation:

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3 years ago

I need help from uh all..

DanielleElmas [232]

Answer:

Step-by-step explanation:

Given expression is,

$\text{cot}A=\frac{1}{2}(\text{cot}\frac{A}{2}-\text{tan}\frac{A}{2})$

To prove this identity we will take the right side of the identity,

$\frac{1}{2}(\text{cot}\frac{A}{2}-\text{tan}\frac{A}{2})=\frac{1}{2}(\frac{1}{\text{tan}\frac{A}{2}}-tan\frac{A}{2})$

$=\frac{1}{2}(\frac{1-\text{tan}^2\frac{A}{2}}{tan\frac{A}{2}})$

$=\frac{1}{2}[\frac{2(1-\text{tan}^2\frac{A}{2})}{2tan\frac{A}{2}}]$

$=\frac{1}{2}(\frac{2}{\text{tan}A} )$ [Since $\text{tan}A=\frac{2\text{tan}\frac{A}{2}}{1-\text{tan}^2\frac{A}{2}}$ ]

= cot A

Hence right side of the equation is equal to the left side of the equation.

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3 years ago

Aiden bought some noteboks and book covers for the upcoming school year.He bought a total of 13 items.Each notebook costs $1.37,

Darina [25.2K]

1.37x + 1.08y = 16.36
x + y = 13

x = 13 - y
1.37* (13-y) + 1.08y = 16.36
17.81 - 1.37y + 1.08y = 16.36
1.08y - 1.37y = 16.36 - 17.81
-0.29y = -1.45
y = 5

x + 5 = 13
x = 13-5
x = 8

He bought 8 notebooks and 5 book covers

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2 years ago

What is the value of the expression below? 2[3(42+1)]-23

s2008m [1.1K]

Answer:

235

Step-by-step explanation:

42+1

3 times 43

129

129 times 2

258

258-23

235

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3 years ago

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