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MissTica
3 years ago
15

78 divided by 21?:-:

Mathematics
2 answers:
den301095 [7]3 years ago
8 0

Answer:

3.714

Step-by-step explanation:

78/21 is 3.71428571429 but you can round that to 3.714

MA_775_DIABLO [31]3 years ago
4 0

Answer:

3.7 or 3.71428571429

Step-by-step explanation:

:/

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-<br> I<br> dot<br> Multi-step aquations
BlackZzzverrR [31]

1) a= -1,  2) n=-2

3) x=4,   4) n=0

5) r=1,     6) r=2

7) No\,\,solution,     8) p=-12

9) m=2,    10) a=-3

11) x=4       12) n=-2

Step-by-step explanation:

We need to solve each equation.

1) 6a+5a = -11

Solving:

Adding like terms:

11a = -11

Divide both sides by 11

a= -1

2) -6n-2n=16

Solving:

Adding like terms:

-8n=16

Divide by -8

n=-2

3) 4x+6+3=17

Solving:

Adding like terms:

4x+9=17

Subtract 9 on both sides:

4x=17-9

4x=8

Divide both sides by 4

x=4

4) 0=-5n-2n

Solving:

0=-7n

Divide both side by -7

n=0

5) 6r-1+6r=11

Solving:

12r-1=11

Adding 1 on both sides

12r=12

Divide both sides by 12

r=1

6) r+11+8r=29

Solving:

9r+11=29\\9r=29-11\\9r=18\\r=2

7) -10=-14v+14v

Solving

-10=-14v+14v\\-10\neq 0\\No\,\,solution

8) -10p+9p=12

Solving:

-10p+9p=12\\-p=12\\p=-12

9) 42=8m+13m

Solving:

42=8m+13m\\42=21m\\m=42/21\\m=2

10) a-2+3=-2

Solving:

a-2+3=-2\\a+1=-2\\a=-2-1\\a=-3

11) 18=3(3x-6)

Solving:

18=3(3x-6)\\18=9x-18\\18+18=9x\\36=9x\\x=36/9\\x=4

12) 30=-5(6n+6)

Solving:

30=-5(6n+6)\\30=-30n-30\\30+30=-30n\\60=-30n\\n=60/-30\\n=-2

Keywords: Solving Polynomials

Learn more about solving Polynomials at:

  • brainly.com/question/12700460
  • brainly.com/question/1414350
  • brainly.com/question/4142886

#learnwithBrainly

8 0
3 years ago
Determine the domain of the following graph<br> eeehh pls help
hodyreva [135]

Answer:

x is greater than or equal to -7 and is less than 7

6 0
2 years ago
Susana collected 5 cents at the recycling plant for each of her 78 cans. Hiw mich money did she collect altogether
shusha [124]
Susana had collected 83 cans altogether.
5 0
3 years ago
Read 2 more answers
Which choice is equivalent to √10*√5?<br> A. 5√2<br> B. 25√2<br> C. 5√10<br> D. 2√5
DanielleElmas [232]

Answer: 5\sqrt{2}

Step-by-step explanation:

\sqrt{10} *\sqrt{5} =\sqrt{50} =\sqrt{2*5*5} =5\sqrt{2}

3 0
3 years ago
A semicircle has an area of 76.97 squared km. Find it’s radius
shtirl [24]

Answer:

7 km

Step-by-step explanation:

Substitute:

The equation for area of a semi-circle is \frac{r^{2}\pi }{2}

A =  \frac{r^{2}\pi }{2}

76.97 =  \frac{r^{2}\pi }{2}

Multiply by 2 on both sides:

2(76.97) = ( \frac{r^{2}\pi }{2})2

153.94 = r^{2} \pi

Divide by pi on both sides:

153.94 = r^{2} \pi

/pi           /pi

49.03 ≈ r^{2}

Find the square root:

\sqrt{49.03} =\sqrt{r^{2} }

7 = r

7 0
3 years ago
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