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Paha777 [63]
3 years ago
10

Pls help 20 points !

Mathematics
1 answer:
Romashka [77]3 years ago
7 0

Answer:

the answer is 168 is the answer

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What else is represented or means the same thing as a sum
My name is Ann [436]

Answer:

aggregate, total, totality, whole, summation, entirety, full, tally, all, body

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
A two-digit number is 5 times the sum of its digits. If 9 is added to the number, its digits are reversed. Find the number​
forsale [732]

Answer:

The number = 45

Step-by-step explanation:

Let the 10s digit = x

Let the units digit = y

10*x + y = 5(x + y)                        Start here: remove the brackets

10*x + y + 9 = 10y + x                   Subtract y and 10x from both sides

Using the first equation

10x + y = 5x + 5y

5x + y - 5y = 0

5x - 4y = 0

5x = 4y

y = 5/4x

From the second equation

9 = 9y - 9x

1 = y - x           Substitute y = 5/4 x

1 = 5/4x - x

1 = 1/4  x

x = 4

y = 5/4 * 4

y = 5.

8 0
2 years ago
What is the value of the expression when a = 6, b = 4, and c = 8?
Y_Kistochka [10]

Answer:

a the answer is a

Step-by-step explanation:

7 0
3 years ago
As a percentage $9.00 is equal to ? of $30.00​
solmaris [256]

Answer:

30%

Step-by-step explanation:

Method 1-

Divide 9 by 9/30. You get 30. This is the percent that you need!

Method 2-

You can also simplify 9/30 down to 3/10. You just multiply this by 10 on both sides. This makes 30/100, or 30%

7 0
4 years ago
Read 2 more answers
Solve the equation. √1 - 2b = 1 + b<br> 1. 0 and 4<br> 2. -2 only<br> 3. 0 only<br> 4. 0 and -2
slava [35]
\sqrt{1-2b} = 1 + b \\ \\ 1 - 2b = (1 + b)^2 \\ \\ 1 - 2b = 1 + 2b + b^2 \\ \\ -2b = 2b + b^2 \\ \\ 2b + 2b + b^2 = 0 \\ \\ 4b + b^2 = 0 \\ \\ b(4 + b) = 0 \\ \\ b = 0, -4 \\ \\ b = -4 \ is \ false \\ \\ b = 0

The final result is, C) 0 only.

We gathered the solutions of b = 0, -4.
b = -4 was not true so we had to remove it from the solution set, and we are left with b = 0 now. You can check this answer by substituting 0 in for b in the original equation. You should get 1 = 1, which is the correct answer.
3 0
3 years ago
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