3 years ago

Twice the sum of m and n.

Mathematics

1 answer:

Sholpan [36]3 years ago

3 0

2(m+n) is the answer. The question is asking for the sum of m and n then multiplying that sum by 2

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3 years ago

What is the best estimate for 56.23 - 45.9?<br> A. 9<br> B. 10<br> C. 11<br> D. 15

DIA [1.3K]

Answer:

10 Letter B

Step-by-step explanation:

56.23 rounds down to 56 and 45.9 rounds up to 46. So 56 - 46 = 10

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2 years ago

A class is playing a game called “Guess my Number,” in which the number is an integer. The teacher gives these clues for the unk

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3 years ago

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What number adds up to be 12 but also multiplies to be 12

netineya [11]

4+3+1+1+1+1+1 =12
4x3x1x1x1x1x1=12

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3 years ago

Sin^22x - 2cos2x + 2=0

zhuklara [117]

Answer:

x=πn, n∈Z

Step-by-step explanation:

if sin²2x=1-cos²2x, then

1-cos²2x-2cos2x+2=0; ⇒ cos²2x+2cos2x-3=0; ⇔ (cos2x+3)(cos2x-1)=0;

$\left[\begin{array}{cc}cos2x+3=0\\cos2x-1=0\\\end{array} \ \ \left[\begin{array}{cc}x \ 'does-not-exist'\\cos2x=1\\\end{array} \ \ 2x=2\pi n, n=Z \ x=\pi n, n=Z$

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2 years ago