Mathematics: Tell whether the given number is a solution of each question. ( Must show work for credit) 1. 9 = 2a + 3; 32. 5n - (-30) = 5; 73. 4.4r - 2.8 = 1.6; 1

So amount minused=hours driven times gallons per mile=h times 2 or 2hso we minus 2h18-2h is the expression...

Tell whether the given number is a solution of each

dakaric94

05.02.2022

Answer/Step-by-step explanation:

1. 9 = 2a + 3 ; 3

Let's solve for a.

9 - 3 = 2a (subtraction property of equality)

6 = 2a

$\frac{6}{2} = a$ (division property of equality)

3 = a

a = 3

Therefore, 3 is a solution to 9 = 2a + 3

2. 5n - (-30) = 5 ; 7

5n + 30 = 5 (- × - = +)

5n = 5 - 30 (Subtraction property of equality)

5n = -25

$\frac{5n}{5} = \frac{-25}{5}$ (division property of equality)

n = -5

Therefore, 7 is not a solution of 5n - (-30) = 5

3. 4.4r - 2.8 = 1.6 ; 1

4.4r = 1.6 + 2.8

4.4r = 4.4

$\frac{4.4r}{4.4} = \frac{4.4}{4.4}$

r = 1

Therefore, 1 is a solution of 4.4r - 2.8 = 1.6 .

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