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erma4kov [3.2K]
3 years ago
5

the art teacher found 3 boxes of brushes and 4 extras brushes. There were 40 brushes in all. how many brushes were in each box

Mathematics
2 answers:
natita [175]3 years ago
7 0
3 boxes times 40 = 120 + 3 = 143
or 3 boxes times 43 = 129
77julia77 [94]3 years ago
5 0
There was 29 brushes in each box

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what is 9z+2=6z-10-z-4 we have to do something called railroad tracks where we put lines down the sides of the equal sign but I
Colt1911 [192]
You want to solve for 'z'.
First combine like terms on either side of the equal sign.

Left side:  9z +2  ----> No like terms, leave alone

Right side: 6z - 10 -z - 4  ----> circle like terms and add
                    6z -z = 5z
                   -10 -4 = -14
Now the equation is:
9z + 2 = 5z - 14

Get all the 'z' terms on the left side and all the numbers on right side.
You can move a term to the other side if you flip the sign.

Move 5z to left side, flip the sign to -5z
Move '2' to right side, flip the sign to -2

9z - 5z = -2 -14

Add like terms
4z = -16

Divide by 4 on both sides
z = -4
3 0
3 years ago
WHICH ONE SHOULD I PUT?
topjm [15]

Answer:

42.5

Step-by-step explanation:

3 0
2 years ago
When a number is decreased by 20% of itself, the result is 16. what is the number?
kati45 [8]
The answer will be 20. 16=80%. 1=0.2%.100%=20
4 0
3 years ago
hey uh please explain / answer these for me <3 i know some of them but I'm just lazy-minded if u know what I mean
Sonbull [250]

Answer:

First Picture: 2032*93 = 188976, 425/25 = 17

Second Picture: the machine is dividing the number by 6

Third picture: 85

Step-by-step explanation:

Second Picture: 36/6 = 6 and 54/9 = 6 therefore the machine is dividing by six

Third Picture: a multiple of 7 is 84 (7*12 = 84). 85 is one more than a multiple of 7. Therefore 85 is the answer. A formula can be 7x + 1 = (then try out different numbers in the grid)

7x+1 = 85

7x = 84

x = 84/7

x = 12

Therefore 85 is one more than a multiple of 7.

5 0
2 years ago
Read 2 more answers
Harding and Jack found that 8 percent of their number was 72. What was their number?
Aneli [31]
I do believe that the answer is 900. 
Steps:
I first set up a proportion, with 8/100 and 72/x (x being the number we are trying to find) 
As I was taught, you multiply 100 by 72, which equals 7,200.
Then, I divided 7,200 by 8, which gave me 900.
This is what the proportion process should have looked like:
8/100    72/x
7,200/8
x=900
I hope this helps!
4 0
3 years ago
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