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garik1379 [7]
4 years ago
5

Solve for x. 3x - 1 = 20 -7 -19/3 19/3 7

Mathematics
1 answer:
olya-2409 [2.1K]4 years ago
3 0
3x - 1 = 20

3x = 21

x = 7

Your answer is D) 7.
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Plsss help I can mark you brainliest
Galina-37 [17]

Answer:

The answer is B.

Step-by-step explanation:

12 ≤ r + 22

r + 22 ≥ 12

r + 22 − 22 ≥ 12 − 22

r ≥ −10

I hope this helps you :D

4 0
3 years ago
The circumference of a circle is 31 in.<br> What is the area of the circle?
garik1379 [7]

Answer: 76.35in²

Step-by-step explanation:

Circumference of a circle = 2πr or πd , while area is πr².

To find the area we must first of all find the radius if the circle using any of the formula above.we then equate 31 to 2πr and then solve for r.

31 = 2πr , where π = 3.142 or 22/7

r = 31/2 x 3.142

= 31 /6.284

= 4.93in

To find the area, substitute for r in the formula above,

Area = πr²

= 3.142 x 4.93²

= 3.142 x 24.30

= 76.35in².

4 0
4 years ago
What is the value of n in the equation (n – 4) – 3 = 3 – (2n + 3)?
Maurinko [17]
(n - 4) - 3 = 3 - (2n + 3)

Let's first start by removing the parenthesis.
(n-4) = +(n-4) so we just remove the parenthesis without changing the signs. So the first part of the equation will be n - 4 - 3.

Before (2n+3), we can notice a minus sign (-) which means that to remove the parenthesis, we need to change the signs of the numbers and variables inside.
-(2n+3) = -2n-3
So the second part of the equation becomes 3 -2n - 3

(n-4) - 3 = 3 - (2n+3)
n - 4 - 3 = 3 - 2n - 3
n - 7 = -2n

Now we need to put the variables apart and the constants apart. So we subtract n from each side:
n - n - 7 = -2n - n
-7 = -3n

Divide both sides by -3
(-7)/(-3) = (-3n)/-3
7/3 = n

In the equation (n-4) - 3 = 3-(2n+3), the value of n is n=7/3

Hope this helps! :)
5 0
3 years ago
Read 2 more answers
Find an equation of the vertical line through (3 comma negative 1 )in the form axplusbyequals​c, where​ a, b, and c are integers
Sati [7]

The equation of the vertical line is 1x+0y=3

Explanation:

It is given that the vertical line passes through the points (3,-1)

For vertical line, the slope is undefined.

Hence, b=0

Let us substitute the coordinate (3,-1) in the equation ax+by=c, we have,

3a+0y=c

Simplifying, we have,

3a=c

3=\frac{c}{a}

where a=1 and c=3

Substituting the values of a, b and c in the equation ax+by=c, we have,

1x+0y=3

Thus, the equation of the vertical line is 1x+0y=3

8 0
3 years ago
Pls help it’s easy but I been staring at this for 2 hours now pls help a lot of points and will give brainlyest
diamong [38]

Answer:?

I have no idea sir sorry yt ;-;

Step-by-step explanation:

5 0
3 years ago
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