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Maru [420]
3 years ago
15

What is the commutative and associative propertys?

Mathematics
1 answer:
timama [110]3 years ago
5 0

Answer:

<u>Commutative property:</u> states that the order in which we multiply numbers does not change the product.

<u>Associative property:</u> states that you can add or multiply regardless of how the numbers are grouped (aka parenthesis).

<u />

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deposits \$700 into an account that pays simple interest at a rate of 6\% per year. How much interest will he be paid in the fir
Virty [35]

Answer:

$210

Step-by-step explanation:

pnr/100

700×6×5/100

$210

5 0
3 years ago
Express M=cos3A + cos A and N = sin3A + sin A as a product form​
elena-14-01-66 [18.8K]

Answer:

2cosAcos2A, 4sinAcos^2A

Step-by-step explanation:

cos3A+cosA

2cos((3A+A)/2)cos((3A-A)/2)

2cos(4A/2)cos(2A/2)

2cosAcos2A

sin3A+sinA

2sin((3A+A)/2)cos((3A-A)/2)

2sin(4A/2)cos(2A/2)

2sin2AcosA

4sinAcos^2A

3 0
2 years ago
What is the equation of the line passing through the point (-2,-1) and perpendicular to the line y = 1/2x+5?
uranmaximum [27]

Step-by-step explanation:

the slope of a line is always the factor of x.

here : 1/2

it is the ratio y/x indicating how many units y changes, when x changes a certain angina amount of units when going from one point to another.

a perpendicular slope puts x and y upside-down and flips the sign.

here : -2/1 = -2

so, the equation looks like

y = -2x + b

b is the y-intercept, and we get this by putting the x and y coordinates of the given point into this equation and solve for b :

-1 = -2×-2 + b

-1 = 4 + b

b = -5

the full equation is therefore

y = -2x - 5

3 0
2 years ago
What is:<br> 3x=y-2 <br> 6x=4-2y
Dimas [21]

Answer:

x − y + 4 = 8 7 x + y = 03 x + 4y = − 5

Step-by-step explanation:

3 0
3 years ago
Mr. Johnson hired a contractor to build a small deck on the back of his house. The cost of materials alone added to $678.12. Whe
raketka [301]

Answer:

Yes, the bill is absolutely accurate

Step-by-step explanation:

Cost of materials= $ 678.12

Final  bill amount(given)=$1206.12

Rate= $32 per hour for 16.5 hrs

Total amount for 32 hrs = time * rate = 16.5* 32=$528

Therefore, by the problem ,

<em>Cost of materials+ Total amount  for 32 hrs = Final bill amount</em>

= 678.12+ 528

=1206.12

<u>Therefore , the final bill amount is 100% accurate as it completely matches with the given bill amount</u>

4 0
3 years ago
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