3 years ago

State the first 3-digit multiple of 7

1 answer:

Elis [28]3 years ago

5 0

Da answer is 7, 14, 21

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sergejj [24]

Answer: -3/8

Step-by-step explanation:

5 0

3 years ago

Effectus [21]

You do pemdas and the answer should be 27

6 0

3 years ago

blsea [12.9K]

Answer:

$x=0^\circ,120^\circ,240^\circ,360^\circ$

Step-by-step explanation:

Use identities to set the equation up as a quadratic

$\cos x=\cos 2x;\:0^\circ \leq x \leq 360^\circ\\\\\cos x=2\cos^2 x-1\\\\0=2\cos^2 x-\cos x-1$

Make the substitution u=cos(x) and solve the quadratic

$0=2u^2-u-1\\\\0=(2u+1)(u-1)$

$\displaystyle 0=2u+1\\\\0=2\cos x+1\\\\-1=2\cos x\\\\-\frac{1}{2}=\cos x\\\\120^\circ,240^\circ=x$

$0=u-1\\\\0=\cos x-1\\\\1=\cos x\\\\0^\circ,360^\circ=x$

Hence, $x=0^\circ,120^\circ,240^\circ,360^\circ$

7 0

2 years ago

Dennis_Churaev [7]

40 x $6=$240
6.5 x $9=$58.50 
8 x $ 12=$ 96 

Answer $394.50

4 0

3 years ago

kirill115 [55]

The answer is 4x that the answer

7 0

3 years ago

State the first 3-digit multiple of 7​