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kenny6666 [7]
3 years ago
5

A number is multiplied by 3,and 7 is added to it to get the result 25.Find the number.

Mathematics
1 answer:
german3 years ago
4 0

Answer:

6

Step-by-step explanation:

25-7=18 18/3= 6.

6x3= 18 18+7= 25

THE ANSWER IS 6

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10. The sum of the digits of a three-digit number is 11. If the digits are reversed, the new number is 46
Zarrin [17]

Answer:

hope this helps

Step-by-step explanation:

The sum of the digits of a three-digit number is 11.

If the digits are reversed, the new number is 46 more than five times the old number.

If the hundreds digit plus twice the tens digit is equal to the units digit, then what is the number?

:

Write an equation for each statement:

:

"The sum of the digits of a three-digit number is 11."

x + y + z = 11

:

The three digit number = 100x + 10y + z

The reversed number = 100z + 10y + x

:

" If the digits are reversed, the new number is 46 more than five times the old number."

100z + 10y + x = 5(100x + 10y + z) + 46

100z + 10y + x = 500x + 50y + 5z + 46

combine on the right

0 = 500x - x + 50y - 10y + 5z - 100z + 46

499x + 40y - 95z = -46

:

"the hundreds digit plus twice the tens digit is equal to the units digit,"

x + 2y = z

x + 2y - z = 0

:

Three equations, 3 unknowns

:

x + y + z = 11

x +2y - z = 0

-----------------Addition eliminates z

2x + 3y = 11

From the 2nd equation statement, we know that the 1st original digit has to be 1

2(1) + 3y = 11

3y = 11 - 2

3y = 9

y = 3 is the 2nd digit

then

1 + 3 + z = 11

z = 11 - 4

z = 7

:

137 is the original number

:

:

Check solution in the 2nd statement

If the digits are reversed, the new number is 46 more than five times the old number."

731 = 5(137) + 46

731 = 685 + 46

7 0
3 years ago
Corey ate a chocolate candy bar that he got for Valentine’s Day. He ate 4/10 of the candy bar on Monday. On Tuesday he ate anoth
VladimirAG [237]
Solutions =2/5×0.3=
3/25
7 0
3 years ago
What is 21/99 in a decimal form
Norma-Jean [14]

Answer:

0.2121~

Step-by-step explanation:

It's a repeating number. 0.0212121212

7 0
3 years ago
Explain why x^2 + y^2 -6x +10y = -34 is NOT a circle. What is it?
kenny6666 [7]

Answer:

(See explanation for further details)

Step-by-step explanation:

The expression is transformed into its standard form:

x^{2} + y^{2} - 6\cdot x + 10\cdot y + 34 = 0

x^{2} - 6\cdot x + 9 + y^{2} + 10\cdot y + 25 = 0

(x-3)^{2} + (y+5)^{2} = 0

The function does not represent a circle, as radius is a positive number.

4 0
3 years ago
Anyone understand what this means
pochemuha
Im doing this too also,

X is greater than equal to negative 4 on the graph closed circle going right>>>>

X is less than equal to 3 closed circle going left....
8 0
3 years ago
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