2 years ago

Which expressions are equivalent to (4⋅a)⋅2 ?

Mathematics

1 answer:

shusha [124]2 years ago

8 0

Answer:

4⋅(a⋅2)

2⋅(4⋅a)

Step-by-step explanation:

(4⋅a)⋅2

4⋅(a⋅2) This is the same by the associative property of multiplication

2⋅(4⋅a) This is the same by the associative property of multiplication and the communicative property of multiplication

4⋅2⋅a⋅2 This brings in an extra 2 so it is not the same.

8a 4*2 = 8 so this is the same

4⋅2+a⋅2 This is the not the same 8+2a is not the same as 8a

You might be interested in

Write the equation for the graphed function. I worked out y = 5 - 4 (x + 4)^2 but that isn't right. Any help would be appreciate

alexira [117]

Vertex form for a parabola with vertex (p,q) is

$y = a(x-p)^2 + q$

We have (p,q)=(-4,5) and another point (-3,2) so we can solve for a:

$2 = a(-3 - -4)^2 + 5$

$2 = a + 5$

$a = -3$

Putting it together,

Answer: $y = -3(x + 4)^2 + 5$

We could multiply that out if we like but I won't bother.

5 0

3 years ago

Can anyone help me with my homework?

OverLord2011 [107]

"22", "7" and "7,5" are the answers in order

3 0

2 years ago

A-8 B-16 C-12 Please help guys.

Ksju [112]

Its c the answer is c because 8+4 is 12 and if you get rid of the angle and move the line so it’s straight it would be both 8 and 4

6 0

1 year ago

A store employee conducted a survey of 390 randomly selected customers. According to the survey, 180 of the customers often use

shusha [124]

You do 390/100 = 180/x then 390×X=390X
180×100=18000
390X=18000
390X÷390=X
18000÷390=46.15384615=46%

7 0

3 years ago

Read 2 more answers

What’s 16.0+8.49 By showing work?

natka813 [3]

Answer:

24.49

Step-by-step explanation:

16.00

8.49

____

24.49

6 0

2 years ago