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3 years ago

Helppppp!!!!!!!!!!!! Which of the following number sentences models the Associative Property of Multiplication?

Mathematics

2 answers:

grigory [225]3 years ago

8 0

Answer:

Step-by-step explanation:

because I learned this like 4 years ago

Jlenok [28]3 years ago

3 0

Answer:

Ahh I think A

Step-by-step explanation:

You might be interested in

Which best describes the realationship between the successive terms in the sequence shown

Kaylis [27]

Answer:

$the \: common \: difference \: is \: - 10$

Step-by-step explanation:

$- 9 - 10 = - 1$

$- 1 - 10 = - 11$

$- 11 - 10 = - 21$

HOP THIS HELPS!

✧◝(⁰▿⁰)◜✧

5 0

3 years ago

How do we know that the derivative of 1/x is equal to -1/x^2 ?

snow_lady [41]

Answer:the derivative of 1/x =-1/x^2

Step-by-step explanation:

1/x can also be written as x^-1

Therefore d/dx of x^-1

=-1*x^-1-1

=-1x^-2

Which can also be written as -1/x^2

Note: d/dx also means derivative of x

And d/dx (a/x^b) =(a*-b) /x^(b+1)

Where a and b represents a variable

4 0

3 years ago

The length of a rectangle is 7 more than twice the width x . The area is . 372

Bad White [126]

Answer:

x (7+2x) = 372,

where 372 is the are of this rectangle, and $x$ is its width.

Step-by-step explanation:

The width of this rectangle is $x$ . Twice that width will be equal to $2x$ .

The length of this rectangle is seven more than twice the width of this rectangle, or seven more than $2x$ . The length of this rectangle will thus equal to $7 + 2x$ .

The area of a rectangle is equal to the product of its width and its length. The width of this rectangle times its length will be equal to $x(7+2x)$ .

For this rectangle, this area is equal to 372. In other words,

$x(7 + 2x) = 372$ .

This equation about $x$ represents the relationship between the width, length, and the area of this rectangle.

8 0

3 years ago

the speed of a stream is 4mph. If a boat travels 92 miles downstream in the same time that it takes to travel 46 miles upstream,

Elanso [62]

Answer:

12 miles per hour

Step-by-step explanation:

Let speed of boat in still water be "x"

and speed of current be "c"

So, downstream rate would be "x + c"

And, upstream rate would be "x - c"

Now, given c = 4

We can use the distance formula, D = RT, where

D is distance, R is rate, and T is time

to solve this.

Downstream:

D = RT

92 = (x+4)(t)

Upstream:

D = RT

46 = (x-4)(t)

Both the times are same, we can equate both the times. Lets simplify first:

t = 92/(x+4)

and

t = 46/(x-4)

Equate:

$\frac{92}{x+4}=\frac{46}{x-4}$

Now, cross multiply and solve for x to get our answer:

$\frac{92}{x+4}=\frac{46}{x-4}\\92(x-4)=46(x+4)\\92x-368=46x+184\\46x=552\\x=12$

Speed of Boat (in still water) = 12 mph

6 0

3 years ago

A cereal company is creating new boxes for its product. In order to display the boxes, the stores they sell to require that the

SashulF [63]

If the problem says "space", that usually means that they are talking about volume. The maximum length the box can be is 8.4 inches. To find volume, you do length * width * height. You know the length and height, as well as the volume. You can replace the width with "x". Your equation should be:

11.5 * 8.4 * x = 272.8

Then you can just solve for x by dividing both sides by (11.5 * 8.4). The answer should be about 2.82 inches.

3 0

3 years ago