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3 years ago

How do you round decimals like 0. Something to 1 significant figure

Mathematics

1 answer:

kotegsom [21]3 years ago

3 0

Step-by-step explanation:

1.look at the first non-zero digit if rounding to one significant figure.

2.look at the digit after the first non-zero digit if rounding to two significant figures.

3.draw a vertical line after the place value digit that is required.

4.look at the next digit

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1-cos(6x)=___?<br> A. 3sin(2x)<br> B. 2sin^2(3x)<br> C. 3cos(2x)<br> D. 2cos^2(3x)

zhenek [66]

The solution to 1 - cos(6x) is 2sin²(x).

Hence, option B) 2sin²(x) is the correct answer.

<h3>What is solution to 1 - cos(6x)?</h3>

Given that; 1 - cos(6x) = ?

First, we rewrite using trig identity

1 - cos(2 × 3x)

Using the double angle identity, { <em>cos2(x) = 1 - 2sin²(x)</em> }

1 - ( 1 - 2sin²(x) )

Eliminate the parentheses

1 - 1 + 2sin²(x)

2sin²(x)

The solution to 1 - cos(6x) is 2sin²(x).

Hence, option B) 2sin²(x) is the correct answer.

Learn more about trig identity here: brainly.com/question/10376944

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4 0

2 years ago

HELP ME PLEASEEEEEEEEEE

Neporo4naja [7]

Answer:

Step-by-step explanation:

To find the value of x you must first set up an equation to solve for x. We are told that Hannah has written 142 more lines than Sam so we can make an equation by subtracting Sam's total from Hannah's total.

(7x + 78) - (6x + 73) = 142

Hannah - Sam = Difference

We then begin to solve. First we must distribute the subtraction to all parts of Sam's equation, creating a new equation of:

7x + 78 - 6x - 73 = 142

Then put like terms together

7x - 6x + 78 - 73 = 142

Condense the like terms

7x - 6x = x

78-73 = 5

x + 5 = 142

Then isolate the x by subtracting the 5.

x + 5 (-5)= 142 (-5)

x = 137

Then plug it back into the equation to check and see if your x is correct

(7x + 78) - (6x + 73) = 142

(7(137) + 78) - (6(137) + 73) = 142

(959 + 78) - (822 + 73) = 142

(1037) - (895) = 142

1037 - 895 = 142

4 0

3 years ago

Read 2 more answers

Help me please please please . 4 - 2 3/4 please show ur work

Aleksandr-060686 [28]

Answer:

$1\frac{1}{4}$ $or$ $1.25$

Step-by-step explanation:

$4-2\frac{3}{4}$

$4-\frac{11}{4}$

$\frac{16}{4} -\frac{11}{4}$

$\frac{16-11}{4}$

$\frac{5}{4}$

$1\frac{1}{4}$ $or$ $1.25$

7 0

3 years ago

Read 2 more answers

Pls help fast i will mark brainlyiest

Leona [35]

The mean temperature of the orange juice is 5 °F <u>greater than</u> the mean temperature of the water

<h3>Calculating Average</h3>

From the question, we are to calculate how much greater the mean temperature of the orange juice is than the mean temperature of the water

From the given chart,

Mean temperature of orange juice = $\frac{59+65+72+78+85+81}{6}$