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Butoxors [25]
3 years ago
8

kathi starts with a number. she adds 3 to her number, then doubles the result. finally, she subtracts 7. if she ended with 9 wha

t number did ahe start with
Mathematics
2 answers:
11111nata11111 [884]3 years ago
6 0
An equation is:
2(x+3)-7=9
Distribute the 2
2(x)+2(3) -7=9
2x+6-7=9
Combine like terms
2x-1=9
Add one to both sides
2x-1+1=9+1
2x=10
Divide both sides by two to isolate the variable.
2x/2=10/2
x=m

soldi70 [24.7K]3 years ago
6 0
I say

5+3=8
8+8=16
16-7=9

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If y varies directly as x, and y is 20 when x is 4, what is the constant of variation for this relation?
Ludmilka [50]

Answer:

Step-by-step explanation:

y = k*x                    This is the formula for a direct variation.

  • y = 20
  • x = 4                        Substitute these values into the direct variation

20 = 4 * k                        Divide by 4

20/4 = 4k/4

k = 5

Answer: the constant of variation is 5

7 0
2 years ago
Someone help me! Im struggling
Assoli18 [71]
The answer would be D

multiply -2 and (-4m-8) to get 8m+16
then subtract -2m to get 6m+16
4 0
3 years ago
Read 2 more answers
The number of points scored by a basketball player in the first eight games of a season are shown below. 15, 35, 18, 30, 25, 21,
hichkok12 [17]

Answer:

im not sure how the data should be interpreted but here is the distribution. It goes up by .416

Step-by-step explanation:

the average of the first 8 games is 24

the average of the 12 games is 24.416

3 0
3 years ago
Find the solutions of the inequality. Show your work.<br><br> 4b – 3 &gt; –1
Gwar [14]
So we have to find b we are going to try to isosiate b 
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8 0
3 years ago
5a - 9 + a = 9
Ne4ueva [31]

Answer:

a = 3

Step-by-step explanation:

1) Simplify 5a - 9 + a to 6a - 9.

6a - 9 = 9

2) Add 9 to both sides.

6a = 9 + 9

3) Simplify 9 + 9 to 18.

6a = 18

4) Divide both sides by 6.

a =  \frac{18}{6}

5) Simplify 18/6 to 3.

a = 3

Therefor, the answer is, a = 3.

7 0
2 years ago
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