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2 years ago

give two examples that show how using parentheses can change the order in wich operations are performed in an expression

2 answers:

8 0

This is because of the order of operations:
Parentheses
Exponent
Divide
Multiply
Add
Subtract

Note that parentheses are the first, so it will affect everything after it.

Examples:
2(5+4)= 2x9= 18
(2x5)+4= 10+4= 14

5/(2+3)= 5/5= 1
(5/2)+3= 2.5+3= 5.5

Flauer [41]2 years ago

4 0

(4 + 2) / 36 = 1/6
4 + 2/36 = 4 + 1/18 = 72/18 + 1/18 = 73/18

(5 - 3) / 4 = 1/4
5 - 3/4 = 20/4 - 3/4 = 17/4

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I need help with this question . I have 1 answer and this question has 4 answers I already found 1.

Romashka-Z-Leto [24]

Answer:

A , C , E , F

Step-by-step explanation:

If you have to write the solution, just tell me.

3 0

1 year ago

Solve the initial value problem <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7Bd%5E%7B2%7Dy%7D%7Bdx%5E%7B2%7D%7D%20%2B%202%20%5C

pogonyaev

The characteristic equation for this ODE is

$r^2+2r+5=0$

which has roots at $r=-1\pm2i$ , so the general solution is

$y_c=(C_1\cos2x+C_2\sin2x)e^{-x}$

Given $y(0)=2$ , we have

$2=(C_1\cos0+C_2\sin0)e^{-0}\implies C_1=2$

and $y'(0)=2$ , we have (upon differentiating $y_c$ )

${y_c}'=((2C_2-C_1)\cos2x-(2C_1+C_2)\sin2x)e^{-x}$
$2=((2C_2-2)\cos0-(4+C_2)\sin0)e^{-0}$
$2=2C_2-2\implies C_2=2$

So the particular solution is

$y_c=(2\cos2x+2\sin2x)e^{-x}$

3 0

2 years ago

Sam, Tim, and Heidi each bought an item at the store. Sam bought a magazine for $2.47, Tim bought a race car for $8.99 and Heidi

Viktor [21]

Well just add them up

2.47 + 8.99 + 6.47 = ???

The answer is $17.93

3 0

2 years ago

Mark wants to create a scale drawing of the poster shown below: A rectangle is shown. The length of the rectangle is labeled 4 c

Vinil7 [7]

2 cm by 5 cm
each of the lengths are divided by two (4/2=2, 10/2=5) to give you the lengths of the poster half of its size

technically you aren't dividing the poster in half, you are multiplying its size by one half.

7 0

3 years ago

Read 2 more answers

Jim has 24 payments remaining on a $25,000 auto loan that was financed for 60 months at an APR of 5%. How much would Jim have to

Dennis_Churaev [7]

Answer:

$11178.20

Step-by-step explanation:

You need to divided the APR/ 12, to know the monthly rate. You have to multiplicate the debt by the monthly rate, the add them. Then substract 471.78 (monthly payment). And repet the procces until the month 36.

You may use an excel sheet to make a table to calculate the payment rmaining.

6 0

2 years ago