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2 years ago

PLS PLSSS HURRY I NEED HELP

Mathematics

1 answer:

Sloan [31]2 years ago

5 0

Answer:

look at the picture i have sent

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I just cant remember how to do these ones. been so long Solve 2x – 5 = 7

TEA [102]

Answer:

2x=7+5

2x=12

X=12/2=6

Kskwkjxu

8 0

2 years ago

What does AC=? Round your answer to the nearest hundredth. Please help

faltersainse [42]

Answer: About 3.06

Step-by-step explanation:

We can use trigonometry functions to solve for AC. Let the ?, representing AC, be "x" in our mathematical work.

Since we have the hypotenuse and x is adjacent to the angle given, I am going to use cosine.

cos(θ) = $\frac{adjacent}{hypotenuse }$

cos(40) = $\frac{x}{4}$

0.766 ≈ $\frac{x}{4}$

3.06 ≈ x

x ≈ 3.06

4 0

2 years ago

HELP!! GEOMETRY

faust18 [17]

Answer:

you just rotate the

Step-by-step explanation:

3 0

2 years ago

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Double angle identity. Just 5 questions. Really need help as my teacher has been frustrated with me

BartSMP [9]

The double angle identities are

$\sin(2x)=2\sin x\cos x$

$\cos(2x)=\cos^2x-\sin^2x$

Then

$2\sin\dfrac\pi6\cos\dfrac\pi6=\sin\left(\dfrac{2\pi}6\right)=\sin\dfrac\pi3$

$\cos^2\dfrac\pi{10}-\sin^2\dfrac\pi{10}=\cos\left(\dfrac{2\pi}{10}\right)=\cos\dfrac\pi5$

The second identity together with the Pythagorean identity, $\sin^2x+\cos^2x=1$ , gives us another equivalent expression:

$\cos^2x-\sin^2x=\cos^2x-(1-\cos^2x)=2\cos^2x-1$

$2\cos^2(0.5)-1=\cos(2\cdot0.5)=\cos1$

4 0

2 years ago

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Identify the terms and like terms in the expression.

Andreyy89

Answer:

1. The like terms are 11x and 2x and the terms are 11x and 2x

2. The like terms are 9x and -5x and the terms are 9x and -5x

3. the like terms are (21x and x) and (6 and -5) and the terms are 21x, 6, -x, and -5.

4. The like terms are (8x and -3x) and (14 and 1). And the terms are 8x, 14, -3x, and 1.

3 0

3 years ago