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leva [86]
3 years ago
12

there are 486 books in the classroon library. Complete the chart to show 486 rounded to the nearest 10 hundreds tens ones

Mathematics
1 answer:
dalvyx [7]3 years ago
6 0
. -tu i....-.ru -.......
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Someone help w these tw
Bumek [7]

1. The simplified expression is 10x+8y-12.

Combine like terms to simplify the expression.

-6x-12+8y+16x

-6x and 16x are both like terms, so those can be combined.

-6x+16x=10x

10x+8y-12

2. The solution to the equation is x=13.

Solve by adding 17 to both sides of the equation.

-4=-17+x

-4+17=-17+17+x

13=x

8 0
3 years ago
Mathswatch? Help <br><br> Angles and parallel lines
GrogVix [38]
The answer is

a) x° = 80

reasons) the reason is a line is 180°
the angle 100°
that would leave you 80° to make a straight line

i hope this helped :)
3 0
3 years ago
Solve for w. 0.05w = 15
steposvetlana [31]
In order to find the value first multiply both sides by 100 to simplify the equation:
0.05w*100=15*100
5w=1500
Next, divide both sides of the equation by 5:
5w/5=1500/5
w=300
The final solution is w=300!

Hope i could help.
have a great day

4 0
3 years ago
Read 2 more answers
Consider the system of equations.
jok3333 [9.3K]

Given:

The system of equations:

x-3y=9

\dfrac{1}{5}x-2y=-1

To find:

The number that can be multiplied by the second equation to eliminate the x-variable when the equations are added together.

Solution:

We have,

x-3y=9                        ...(i)

\dfrac{1}{5}x-2y=-1       ...(ii)

The coefficient of x in (i) and (ii) are 1 and \dfrac{1}{5} respectively.

To eliminate the variable x by adding the equations, we need the coefficients of x as the additive inverse of each other, i.e, a and -a So, a+(-a)=0.

It means, we have to convert \dfrac{1}{5} into -1. It is possible if we multiply the equation (ii) by -5.

On multiplying equation (ii) by -5, we get

-x+10y=5       ...(iii)

On adding (i) and (iii), we get

7y=14

Here, x is eliminated.

Therefore, the number -5 can be multiplied by the second equation to eliminate the x-variable.

6 0
2 years ago
Find the missing values in the ratio table then write the equivalent ratios<br><br>PLS HURRY!!​
yarga [219]

Answer:

1. 10

2. 4, and the bottom row is 21

3. divide the bottom by 4. you get 8

4. top row is 15 and bottom row is missing 6

8 0
2 years ago
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