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garik1379 [7]
3 years ago
5

Ashley came to school 17 out of the last 20 days what percent of the last 20 days did Ashley come to school

Mathematics
1 answer:
stich3 [128]3 years ago
6 0

Answer:

18

Step-by-step explanation:

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Solve the system by substitution.<br> 1. y = -6x – 7<br> y = -7x <br><br> 2. -y=x<br> 3x+5y=20
Drupady [299]

Answer:

For no. 1:

One of the equations say that y=-7x

So plug in -7x to the other equation as y so you equation would be

-7x= -6x-7

And then, just solve for the variable:

*add -6x to both sides*:

-x= -7

*multiply both by negative one to get a positive variable*

FOR NUMBER 1, THE ANSWER IS:

x=7

Y=-7

For no. 2:

-y=x and your other equation is 3x+5y=20

Plug in x as -y:

-3y+5y=20

*simplify*

2y=20

*divide by 2 on each side to get 1 variable alone*

Y=10

FOR NUMBER 2, THE ANSWER IS:

x=-y

Y=10

8 0
3 years ago
MM13 (Minute Math 13) 7th Grade Math
Damm [24]

Answer:

Step-by-step explanation:

1.9

2.207.5

3.no comment

4.c.5

5.35 is the third box dont know the fourth the dont know sixth box

6.yes

7. Fahrenheit

8.b.75%

9.a.15

10.c.50 milligrams

7 0
3 years ago
Read 2 more answers
Solve:<br><br> (15/x)+(9x-7)/(x+2)=9
hram777 [196]

Answer:x=3

Step-by-step explanation:

D( x )

x+2 = 0

x = 0

x+2 = 0

x+2 = 0

x+2 = 0 // - 2

x = -2

x = 0

x = 0

x in (-oo:-2) U (-2:0) U (0:+oo)

(9*x-7)/(x+2)+15/x = 9 // - 9

(9*x-7)/(x+2)+15/x-9 = 0

(x*(9*x-7))/(x*(x+2))+(15*(x+2))/(x*(x+2))+(-9*x*(x+2))/(x*(x+2)) = 0

x*(9*x-7)+15*(x+2)-9*x*(x+2) = 0

9*x^2-9*x^2+8*x-18*x+30 = 0

30-10*x = 0

(30-10*x)/(x*(x+2)) = 0

(30-10*x)/(x*(x+2)) = 0 // * x*(x+2)

30-10*x = 0

30-10*x = 0 // - 30

-10*x = -30 // : -10

x = -30/(-10)

x = 3

x = 3

3 0
3 years ago
16 1/3+8 2/5<br><br> show how you got the answer
scoundrel [369]

Answer:

24.73

Step-by-step explanation:

1/3=.33

2/5=.40

0.40+0.33=0.73

16+8=24

24.73

5 0
3 years ago
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How Much Percentage is 7 out of 45.99?​
mojhsa [17]

Answer:

7 is 15.220700152207% of 45.99

Step-by-step explanation:

To get the solution, we are looking for, we need to point out what we know.

1. We assume, that the number 45.99 is 100% - because it's the output value of the task.

2. We assume, that x is the value we are looking for.

3. If 100% equals 45.99, so we can write it down as 100%=45.99.

4. We know, that x% equals 7 of the output value, so we can write it down as x%=7.

5. Now we have two simple equations:

1) 100%=45.99

2) x%=7

where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:

100%/x%=45.99/7

6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 7 is what percent of 45.99

100%/x%=45.99/7

(100/x)*x=(45.99/7)*x       - we multiply both sides of the equation by x

100=6.57*x       - we divide both sides of the equation by (6.57) to get x

100/6.57=x

15.220700152207=x

x=15.220700152207

8 0
3 years ago
Read 2 more answers
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