2 years ago

Find the ratio a:b if it is givin that a/3 = b/4

Mathematics

1 answer:

wariber [46]2 years ago

3 0

Answer:

Step-by-step explanation:

Cross multiply the givens

3b = 4a Divide both sides by 4

3b/4 = a Now divide by b

3/4 = a/b

This can be written as

3:4 :: a:b

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Plzzz hurry up and help me if A+B=45<br>prove that <br>(1+tanA)(1+tanB)=2

Solnce55 [7]

Answer:

see explanation

Step-by-step explanation:

If A +B = 45° then tan(A+B) = tan45° = 1

Expanding (1 + tanA)(1 + tanB)

= 1 + tanA + tanB + tanAtanB → (1)

Using the Addition formula for tan(A + B)

tan(A+B) = $\frac{tanA+tanB}{1-tanAtanB}$ = 1 ← from above

Hence

tanA + tanB = 1 - tanAtanB ( add tanAtanB to both sides )

tanA + tanB + tanAtanB = 1 ( add 1 to both sides )

1 + tanA + tanB + tanAtanB = 2

Then from (1)

(1 + tanA)(1 + tanB) = 2 ⇒ proven

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3 years ago

Veronika [31]

Answer: 6.75% which rounds up to 7%

Step-by-step explanation:

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2 years ago

A carton is 15 inches long ,10 inches wide and 12inches high.Mindy wants to wrap to wrap up the carton. What is the minimum area

pantera1 [17]

1800 wrapping paper i believe

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2 years ago

Find a linear equation whose graph is the straight line with the given property through (0.5,7) and parallel to the line 4x-2y=1

Gre4nikov [31]

A factor of 2 can be removed from the given line to put it in standard form. Then the given point can be substituted to find the new constant.
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The equation you seek is
2x - y = -6

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3 years ago

Find the measure of DA

Keith_Richards [23]

Answer:

Step-by-step explanation:

First, find x

set your formula up as 3x+5=6x-10, since AB and DC are the same length.

This means x = 5

Now substitute 5 for x in the line DA

4x-5

4 * 5 - 5 = 15

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2 years ago