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Inessa05 [86]
3 years ago
13

What the difference of twice a number and 3 is -21

Mathematics
1 answer:
mario62 [17]3 years ago
3 0

Answer:

Step-by-step explanation:

2x - 3 = - 21          Add 3

2x = -21 + 3          Combine the right

2x = -18                Divide by 2

x = - 18/2

x = -9

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What is the solution to the equation -4(2x+3)=2x+6-(8x+2)
Masja [62]

Answer:

b.)  x = -8

Step-by-step explanation:

Solve  -4*(2x + 3) = 2x + 6 - (8x + 2)

-8x + -12  = 2x + 6 - 8x - 2

-8x - 12 = -6x + 4

-12 = 8x - 6x + 4

-12 = 2x + 4

-12 - 4 = 2x

-16 = 2x

x = -8

4 0
4 years ago
Which set of three numbers could be the side lengths of a triangle?
spin [16.1K]

Answer:

The correct option is C.

Step-by-step explanation:

In a triangle, then sum of two smaller sides is greater than the length of third greatest side.

Let, in a triangle ABC, If the length of sides are a, then

c

In option A,

8\nless 2+4

Therefore option A is incorrect.

In option B,

6\nless 2+4

Therefore option B is incorrect.

In option C,

7

Therefore option C is correct.

In option D,

9\nless 3+5

Therefore option D is incorrect.

7 0
3 years ago
Read 2 more answers
HELP PLSSSSSSSSSS ASAP
seropon [69]

Answer:

1. 4 gal= 16 qt.

2. 6 qt= 12 pt.

3. 11 pt= 176 fl oz.

4. 18 c= 144 fl oz.

5. 48 qt= 12 gal.

6. 17 gal= 136 pt.

7. 19 qt= 76 c.

8. 256 c= 16 gal.

9. 12 gal= 96 pt.

10. 28 c= 14 pt.

11. 17 c= 136 fl oz.

12. 128 fl oz= 16 c.

13. 8 gal= 32 qt.

14. 20 qt= 640 fl oz.

15. 4 qt= 8 pt.

16. 18 qt= 72 c.

+ if this helped you, please consider marking it the Brainliest.

8 0
3 years ago
This graph represents a proportional relationship between the number of months, x, data is used on a cell phone and the total co
Julli [10]

Answer:

It would be y = 40x

The new equation is y = 45x

Step-by-step explanation:

I did the other question you put ;)

5 0
3 years ago
Read 2 more answers
F(x)=2x+3 and g(x)=x^2. find (f-g)(x)
aliina [53]

Answer:

(f - g)(x) = -x² + 2x + 3

Step-by-step explanation:

Step 1: Define

f(x) = 2x + 3

g(x) = x²

(f - g)(x) = f(x) - g(x)

Step 2: Set up expression (Substitute)

(f - g)(x) = f(x) - g(x)

(f - g)(x) = 2x + 3 - x²

Step 3: Simplify

(f - g)(x) = -x² + 2x + 3

6 0
3 years ago
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