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zheka24 [161]
3 years ago
6

31. Find the value of each variable.

Mathematics
1 answer:
Svetach [21]3 years ago
6 0

Answer:

z = 50

x = 26

Step-by-step explanation:

set 3z + 10 = 4z - 40 and solve: z = 50

create equation for 5x:

5x + 50 = 180, solve: x = 26

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Solve for x: 3(x + 1) = −2(x − 1) − 4.
Vlad [161]

Answer:

Multiply the first bracket by 3

Multiply the second bracket by -2

3x+3=-2x+2-4

3x+2x+3=-2x-2   negative (-) number and positive number (+)= negative number

Just rearranging

5x+3=-2

5x+3-3=-2-3

5x=-5

Dividing by 5

5x/5=-5/5

x=-1

Check answer by using substitution method

3(-1+1)=-2(-1-1)-4

0=-2(-2)-4 negative number and negative number = positive number

0=4-4

0=0

Answer is x=-1

6 0
3 years ago
Can someone please help me with these two questions! :( ill mark u as brainlest
Maslowich

Answer:

1.A by SSS axiom

2.F as angle A is 62*

4 0
3 years ago
Answer step by step <br> please
Vanyuwa [196]

Answer:

the answer is D, because 30/2 is 15.

7 0
3 years ago
Read 2 more answers
How many seconds are in 76 minutes
Kipish [7]

Answer:

4560

Step-by-step explanation:

Well, first we need to understand how different time formats (for lack of a better word) are related in terms of seconds.

1 minute has 60 seconds

I hour has 3600 seconds

1 day has 86400 seconds

1 week has 604800 seconds

Now, with this information at hand, you can find out how many seconds are in X minutes or X days or X months or a year (and so on).

As for your question, we know that one minute has 60 seconds therefore 76 minutes will have (76x60) seconds

5 0
3 years ago
Read 2 more answers
Find the product 3 • ( -7 )
Vera_Pavlovna [14]

Answer:-21

Step-by-step explanation:

3•(-7)

3 x -7=-21

4 0
3 years ago
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