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Sunny_sXe [5.5K]
2 years ago
15

Anyone know how to do this??

Mathematics
1 answer:
nevsk [136]2 years ago
5 0

Answer:

x=5ft

Step-by-step explanation:

3 is half of 6, so triangle DEF is half as big as triangle ABC. Hope this helps.

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What is the solution to the equation 2^x+4 -12=20?<br> A. x=0<br> B. x=1<br> C. x=2<br> D. x=9
seropon [69]
<span>2^x+4 -12=20
</span><span>2^x+4 = 20+12
</span><span>2^x+4 = 32
</span><span>2^x+4 = 2^5
x+4 = 5
x = 1

answer is </span><span>B. x=1</span>
8 0
3 years ago
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Prove the trigonometric identity
Annette [7]

Answer:

Proved See below

Step-by-step explanation:

Man this one is a world of its own :D Just a quick question are you a fellow Add Math student in O levels i remember this question from back in the day :D Anyhow Lets get started

For this question we need to know the following identities:

1+tan^{2}x=sec^2x\\\\1+cot^2x=cosec^2x\\\\sin^2x+cos^2x=1

Lets solve the bottom most part first:

1-\frac{1}{1-sec^2x} \\\\

Take LCM

1-\frac{1}{1-sec^2x} \\\\\frac{1-sec^2x-1}{1-sec^2x} \\\\\frac{-sec^2x}{1-sec^2x} \\\\\frac{-(1+tan^2x)}{-tan^2x}

now break the LCM

\frac{-1}{-tan^2x}+\frac{-tan^2x}{-tan^2x}\\\\\frac{1}{tan^2x}+1\\\\cot^2x+1

because 1/tan = cot x

and furthermore,

cot^2x+1\\cosec^2x

now we solve the above part and replace the bottom most part that we solved with cosec^2x

\frac{1}{1-\frac{1}{cosec^2x} } \\\\\frac{1}{1-sin^2x} \\\\\frac{1}{cos^2x}\\\\sec^2x

Hence proved! :D

4 0
3 years ago
a movie ticket cost $9. a concert ticket cost $45. which equation can be use to find how many times as much the concert ticket c
Maurinko [17]

Answer:

9x5=45

Step-by-step explanation:

4 0
3 years ago
Keith plans to buy a car in the future. He currently has $3,000 saved up to buy the car. How much money (x) does he need to save
iVinArrow [24]
708.33333333 or 708.4 $ a month
4 0
3 years ago
Identify the reason that justifies the statement.
Amiraneli [1.4K]

Answer:

C; Substitution property

Step-by-step explanation:

Here, we want to find the justification that justifies the written equation;

If PQ + RS = PS

and RS = XY

then PQ + XY = PS

What we simply did is to substitute RS for XY in the second equation;

The correct answer is Substitution property

It can be fully referred to as the substitution property of equality.

What it simply means in a nut shell is that since XY and RS are equal, then in any addition or arithmetic equation, we can make a substitution of XY for RS since they are equal to each other

5 0
2 years ago
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