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katovenus [111]
3 years ago
11

Please can someone explain this in very large detail???

Mathematics
1 answer:
Viktor [21]3 years ago
5 0

Step-by-step explanation:

\frac{3a - 1}{4 }  -  \frac{2a + 1}{7}  = 3 \\  \\   \frac{7(3a - 1)}{4 \times 7}  -  \frac{4(2a + 1)}{7 \times 4}  = 3 \\  \\  \frac{(21a - 7)}{28}  -  \frac{(8a + 4)}{28}  = 3 \\  \\  \frac{(21a - 7) - (8a + 4)}{28}  = 3  \\  \\ \frac{21a - 7 - 8a  - 4}{28}  = 3  \\  \\ \frac{13a - 11}{28}  = 3  \\  \\ 13a - 11 = 28 \times 3 \\  \\ 13a - 11 = 84 \\  \\ 13a = 84 + 11 \\ \\  13a = 95 \\  \\ a  =  \frac{95}{13}  \\  \\ \huge \red{ \boxed{ a = 7 \frac{4}{13}}}

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NO LINKS PLEASE HURRY I REALLY NEED HELP
alisha [4.7K]

Answer:

The choice;

- 1.45x - 3.41

I hope I helped you^_^

4 0
3 years ago
Read 2 more answers
Tara has ¾ cup of ice cream. How many ⅕ cup servings are in ¾ cup of ice cream?
My name is Ann [436]

Answer:

3 3/4

Step-by-step explanation:

3/4 * 1/5

First you would turn 1/5 into a reciprocal

Now your equation would be 3/4 *5/1

Now you multiply 3/4 * 5/1

15/4

Now find 15/4 as a mixed number

15/4 as a mixed number would be 3 3/4

Therefore there are 3 3/4 1/2 cup servings in a 3/4 cup of ice

8 0
3 years ago
The length of a rectangle is 8 feet more than its width. If the width is increased by 4 feet and the length is decreased by 5 fe
alexgriva [62]
Let the width be x.

Length is 8 feet more than width. Length = x + 8

Area = x(x + 8)

width increased by 4, that is,  (x + 4)
Length decreased by 5,    (x + 8 - 5) = (x + 3)

Area  = (x + 4)(x +3)

Area remains the same

x(x + 8) = (x+4)(x +3)

x² + 8x =   x(x +3) + 4(x +3)

 x² + 8x =   x² +3x + 4x +12

x² + 8x =   x² +7x +12        Eliminate x² from both sides

8x = 7x + 12

8x - 7x = 12

x = 12

Dimensions of original rectangle :  x,  x + 8

12, 12 +8 =   12, 20

Original rectangle is   20 feet   by 12 feet 
5 0
3 years ago
Read 2 more answers
There are 16 pieces of fruit in a basket, including 2 nectarines. What is the probability that a randomly selected piece of frui
Ahat [919]

Answer:

1/8

Step-by-step explanation:

P(nectarine) = number of nectarines / total

                       =2/16

                        = 1/8

4 0
3 years ago
Need help it seems so simple but i dont know what it is
wel
3,5 ?
Hope this helps!
4 0
4 years ago
Read 2 more answers
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