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mr_godi [17]
3 years ago
15

Multiple choice question: Which equation demonstrates the identity property of multiplication?

Mathematics
1 answer:
Svetllana [295]3 years ago
5 0

Answer:

It is a*1=a

Step-by-step explanation:

This is because the identity property of multiplication states:

The product of 1 and any number is that number.

So therefore this equation represents the property

where a number A times 1 equals the number itself A.

so a*1=a is the correct answer

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Write an expression for the amount of change you will get when you pay for a purchase p with a 20 dollar bill. Make a table to f
Mashutka [201]

change,c = 20 - p

so in Excel for example

put 20 in column a

put 11.59, 17.50 etc in column b

in column c put the equation '=20 - b1'

3 0
3 years ago
Read 2 more answers
If a+ b + c= -6 and x +y = 5, what is 9y +9x - 10a-10c -10b ?
Lisa [10]

Answer:

9y +9x - 10a-10c -10b = 105

Step-by-step explanation:

Given

a+b+c = -6 and x+y = 5

We have to find 9y +9x - 10a-10c -10b

Rearranging the terms

9x+9y-10a-10b-10c

Simplifying will give us:

= 9 (x+y) - 10(a+b+c)

Putting the values of x+y and a+b+c

= 9(5) -10(-6)

=45+60

=105

Therefore,

9y +9x - 10a-10c -10b = 105 ..

5 0
3 years ago
Read 2 more answers
Help&amp;EXPLAIN <br><br> Don’t use for points or will be reported and I’ll take the points back
ella [17]

Answer:

x = 60°

Step-by-step explanation:

since, the triangles are complementary the sum of their measures will be 90°

now,

  • =》30° + x = 90°

  • =》x = 90° - 30°

  • =》x = 60°
4 0
2 years ago
What is the approximate distance between the points (-2, 3, -5) and (2, -7, 4)?
tatiyna
To approximate the distance of points with three dimension, make use of the equation,

                           d = sqrt ((x2 - x1)^2 + (y2 - y1)^2 +(z2 - z1)^2)

Substituting all the data from the points given, 
                       
                    <span>d = sqrt ((2 - -2)^2 + (-7 - 3)^2 +(4 - -5)^2) = sqrt 197
</span>
Thus, the distance from the points is approximately 14.04 and that is letter D. 
               
4 0
3 years ago
Can someone help me do this problem and explain it to me step by step? If so I’ll mark you brainliest
Advocard [28]

Answer:

-21

28

Step-by-step explanation:

1) if r = -4

Substitute r = -4 in 3r - 9

= 3 * (-4) - 9

= -12 - 9

= -21

2) ( 4 / 7 ) * x = 16

 4 * x = 16 * 7

 x = 4 * 7

 x = 28

7 0
2 years ago
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