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svet-max [94.6K]
3 years ago
10

How do you solve 3(m + 5 + 9m)

Mathematics
2 answers:
olchik [2.2K]3 years ago
8 0
<h2>Answer :</h2>

= 3(m+5+9m)

= 3m+15+27m

= 30m+15

= 15(2m+1)

IceJOKER [234]3 years ago
3 0

Step-by-step explanation:

= 3(m+5+9m)

= 3m+15+27m

= 30m+15

= 15(2m+1)

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If (x+3) varies directly as y and x=3 when y=12, what is the value of x when y=8?
slavikrds [6]

Answer:

x = 1.

Step-by-step explanation:

y = k(x + 3)

When x = 3 y = 12 so

12 = k(3 + 3)

6k = 12

k = 2.

So the relation is y = 2(x + 3)

When y is 8:

8 = 2(x + 3)

2x = 8 - 2*3 = 2

x = 1.

6 0
3 years ago
Which matrix Is the product of a 3x3 identity matrix and the scalar 3
maw [93]

Answer:

  Each diagonal element will be 3. Off-diagonal elements will be zero.

Step-by-step explanation:

The one that looks like ...

  \left[\begin{array}{ccc}3&0&0\\0&3&0\\0&0&3\end{array}\right]

8 0
4 years ago
How many 2.5 inch by 6 inch tiles will fit on a back splash that is 2.5 feet tall and 8 feet long?
Maksim231197 [3]
Area of each of the tiles = (2.5 * 6) inches^2
                                       = 15 inches^2
Now we have to get down to the case of the backsplash
1 feet = 12 inches
Then
Length of the back splash = 8 feet
                                           = (8 * 12) inches
                                           = 96 inches
Height of the back splash = 2.5 feet
                                         = (2.5 * 12) inches
                                         = 30 inches
Then
Area of the back splash = ( 30 * 96) inches^2
                                       = 2880 inches^2
So
The number of tiles required to fit in the back splash = 2880/15
                                                                                     = 192
So 192 tiles will be required to fit in the back splash. I hope the procedure is clear enough for you to understand. 
8 0
3 years ago
Read 2 more answers
Find the value of the expression 2x^3 + 3y^2 − 17 when x = 3 and y = 4
Advocard [28]
I hope this helps you

3 0
3 years ago
The sparkling house cleaning company has cleaned 28 houses this week. If this number represents 40% of the total number of house
erma4kov [3.2K]
28 number of Houses = 40% of the total houses the cleaning company needs to clean in a week.
Find the total number of houses do the cleaning company needs to clean in a week>
=> 28 number of houses / 40%
=> 28 / 0.4
=> 70
Thus, the total number of houses that a cleaning company needs to clean in the whole week is 70 houses.
Since they already cleaned 40% of it, which is 28, thus, they still need to clean 42 more.



3 0
4 years ago
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