All categories

3 years ago

Which property of multiplication or addition was used to rewrite 5(2−7) as (2−7)5 ?

Mathematics

2 answers:

Talja [164]3 years ago

3 0

Associative property

Elza [17]3 years ago

3 0

This is the commutative property of multiplication:
a x b = b x a

You might be interested in

Square root of 9 I'll mark the 1st

Kitty [74]

Answer:

Step-by-step explanation:

4 0

3 years ago

Find the value of a if the line joining the points (3a,4) and (a,-3) has a gradient of 1

Otrada [13]

Recall that the slope or gradient of a line segment through two points is the ratio of the change in the y coordinate to the change in the x coordinate.

If the gradient is 1, then

1 = (-3 - 4) / (a - 3a)

Solve for a :

1 = -7 / (-2a)

1 = 7/(2a)

2a = 7

a = 7/2

6 0

3 years ago

Which statement best describes the expression 3 + 2 ÷ y? (1 point) The quotient of y and the sum of 3 and 2 The quotient of the

Gelneren [198K]

Answer:

The sum of 3 and the quotient of y and 2.

Step-by-step explanation:

4 0

3 years ago

Tom has 24 books. 8 books are novels,

Juliette [100K]

25% is the percentage of magazines

8 0

3 years ago

I need to figure out how many solutions does the system of equations below have.

Aleonysh [2.5K]

Answer:

The system has one solution.

Step-by-step explanation:

To find the number of solutions of the system, we equal both equations for y.

If we have ax = b, in which both a and b are different of 0, we have one solution.

If both a and b are 0, we have infinite solutions.

If a is 0 and b is not, there are no solutions.

y=6/7x-8 and y=7/9x+10/9

$\frac{6x}{7} - 8 = \frac{7x}{9} + \frac{10}{9}$

$\frac{6x}{7} - \frac{7x}{9} = \frac{10}{9} + 8$

$\frac{54x - 49x}{63} = \frac{10}{9} + \frac{72}{9}$

$\frac{5x}{63} = \frac{82}{9}$

$45x = 63*82$

Both a and b are different of 0, so the system has one solution.

6 0

2 years ago