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valkas [14]
3 years ago
10

Estimate, then find the sum of 312+397

Mathematics
2 answers:
Irina18 [472]3 years ago
6 0
312 397 ___ 709 that the answer if summary number by number you going to find it.
Klio2033 [76]3 years ago
4 0
The estimate is 700 and the answer is 709.I did this all on paper so don't worry I am very good at estimating and adding. 
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What is the answer of this problem -7/3(3x-2)=-21 ?
weeeeeb [17]

Answer:

= 11/3

Step-by-step explanation:

1. COMBINE MULTIPLIED TERMS INTO A SINGLE FRACTION

- 7/3 (3x-2)= -21

-7 (3x-2) = -21

-----------------------

3

2. DISTRIBUTE

-7( 3x- 2) ➗ 3 =-21

3. MULTIPLY ALL TERMS BY THE SAME VALUE TO ELIMINATE FRACTION DENOMINATORS

-21x + 14 ➗ 3 = 3 (-21)

4. CANCEL MULTIPLIED TERMS THAT ARE IN THE DENOMINATOR

3 ( -21x + 14) ➗ 3 (-21)

5. MULIPLY THE NUMBERS

-21x + 14 = 3(-21)

6. SUBTRACT 14 FROM BOTH SIDES OF THE EQUATION

-21x + 14 = -63

7. SIMPLIFY

-21x = - 77

8. DIVIDE BOTH SIDES OF THE EQUATION BY THE SAME TERM

-21x/-21 = -77/-21

9. SIMPLIFY

x = 11/3

3 0
3 years ago
Fifteen years later, a man will be two times as old as he was 15 years ago. How old is he now?
Inga [223]

Answer:

Let the present age of the man be x years.

Age of the man 15 years ago =(x−15) years and

Age of the man 15 years later =(x+15) years

According to the given condition, we have

(x+15)=2(x−15)

⇒x+15=2x−30

⇒x−2x=−30−15

⇒−x=−45 or x=45 years

Hence, the present age of the man is 45 years.

Step-by-step explanation:

Hope it helps you..

Your welcome in advance..

(◍•ᴗ•◍)

6 0
2 years ago
Read 2 more answers
Can you help me with this?
satela [25.4K]
I cant hardly see it ,what's the question?
8 0
3 years ago
Dobby the house-elf has dropped all his socks on the floor in the middle of the night! He has 30 red socks, 22 gold socks and 14
Ugo [173]
There is a total of 66 socks on the floor the chance of picking up a red sock is 30 in 66 which is equal to a 45% chance.  After picking up one sock the chances of getting another red sock is 29 in 65 which is around 44%.  Now I believe your answer is 45% or around 30 socks.  I hope this helped but please let me know.
3 0
3 years ago
Find y<br>Solve the simultaneous <br>equations<br><br><br>3x + 2y = 27 3x - Y = 9<br>​
lutik1710 [3]

Answer:

y = 6

Step-by-step explanation:

To find y, we need to eliminate x in this system of equations:

3\cdot x + 2\cdot y = 27 (1)

3\cdot x - y = 9 (2)

From (1) and (2):

x = \frac{27-2\cdot y}{3}

x = \frac{9+y}{3}

Then, we equalize both expressions and solve for y:

\frac{27-2\cdot y}{3} = \frac{9+y}{3}

27-2\cdot y = 9 + y

3\cdot y = 18

y = 6

6 0
3 years ago
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