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strojnjashka [21]
2 years ago
7

4 7/10 + 6/8 Fractions please help cant solve. used two methods but answer isnt the same as the answer page from the book

Mathematics
2 answers:
erastova [34]2 years ago
6 0

Answer:

5 9/20

Step-by-step explanation:

4 7/10 + 6/8

Simplify the fractions by dividing the second top and bottom  by 2

4 7/10 + 3/4

Getting a common denominator of 20

4 7/10 *2/2  + 3/4 * 5/5

4 14/20  + 15/20

4 29/20

4 + 20/20 + 9/20

4+1+9/20

5 9/20

pav-90 [236]2 years ago
4 0

First, you have to find the common denominator.

It is 40.

But if we change the denominator, you have to change the numerator as well.

We multiplied 10 by 4 to get to 40, so we multiply 7 by 4.

\frac{28}{40}

We multiplied 8 by 5 to get to 40, so we do the same to 6:

\frac{30}{40}

Now add them:

\frac{28}{40} +\frac{30}{40}

We get:

58/40

1+18/40 is my answer...

You might be interested in
Evaluate the expression<br>7 + 10 /5​
Anestetic [448]

Answer:

9

Step-by-step explanation:

Use PEMDAS (Parenthesis, exponent, multiplication, devision, addition, subtraction)

So....

7 + 2 .... Simplified ( 10/5 =2)

9 ..... Added

Hope this helps!

4 0
3 years ago
Read 2 more answers
The number can be divided by the least common multiple of 3 and 5
kondaur [170]

9514 1404 393

Answer:

  255

Step-by-step explanation:

If the sum of digits is 12, the number is divisible by 3. If the number ends in 0 or 5, it is divisible by 5. So, we're looking for ...

  2x0 . . . where x is a digit and 2+x+0 = 12 . . . . . . not possible

  2x5 . . . where x is a digit and 2+x+5 = 12 . . . . true for x=5

The number is 255.

3 0
3 years ago
An employee receives a weekly salary of $340 and a 6% commission on all sales.
Alina [70]
340+.06(sales)
340+.06(660)

$379.60
5 0
3 years ago
Camilla has three times as many points as Lynn. Lynn has five
REY [17]

Step-by-step explanation:

l x 3 = c

k + 5 = l

(c + l + k) x 2 = 25

c = 33

l = 11

k = 6

5 0
3 years ago
Solution of this equation
lara31 [8.8K]
2.5y + 3x = 27
5x - 2.5y = 5

Align the variables to make solving this easier.

2.5y + 3x = 27
-2.5y + 5x = 5

You can see that the 2.5y and -2.5y cancel each other out. Then add the 3x and 5x, and 27 + 5.

3x = 27
5x = 5

8x = 32

Divide both sides by 8.

x = 4

Now input that x into one of the equations to get y. 

2.5y + 3(4) = 27
2.5y + 12 = 27
2.5y = 15
y = 6

The answer to this system of equations is x = 4, y = 6. (4, 6)
5 0
3 years ago
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