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iVinArrow [24]
3 years ago
10

What is 3/7 +1/5 and how would I get it​

Mathematics
2 answers:
barxatty [35]3 years ago
7 0

Answer:

22/35

Step-by-step explanation:

1. find a common denominator

- for this you would multiply each of the denominators to each other as well as the numerators.

- (3*5 / 7*5) + (1*7 / 5*7)

2. 15/35 + 7/35 = 22/35

3. The denominator stays the same

Hope this helps :)

Aleks04 [339]3 years ago
5 0

Answer:

22/35

Step-by-step explanation:

3/7 + 1/5

First, find a common denominator.

7*5=35  multiply the numerator by 5 too: 3*5=15

5*7=35  multiply the numerator by 7 too: 1*7=7

15/35 + 7/35

=22/35

Cannot be simplified.

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castortr0y [4]
Answer: second option y = 2(x + 7/2)^2 + 1/2

Explanation:

1) given:

y = (x + 3)^2 + (x + 4)^2

2) expand the binomials:

y = x^2 + 6x + 9 + x^2 + 8x + 16

3) add like terms:

y = 2x^2 + 14x + 25

4) take common factor 2 of the first two terms:

y = 2 (x^2 + 7x) + 25

5) complete squares for x^2 + 7x

x^2 + 7x = [x +(7/2)x ]^2 - 49/4

6) substitue x^2 + 7x = (x + 7/2)^2 - 49/4 in the equation for y:

y = 2 [ (x + 7/2)^2  - 49/4] + 25

7) take -49/4 out of the square brackets.

y = 2 (x + 7/2)^2 - 49/2 + 25

8) add like terms:

y = 2(x + 7/2)^2 + 1/2

And that is the vertex for of the given expression.

7 0
3 years ago
How many solutions exist for the given equation?
Archy [21]

Answer:

Infinitely many

Step-by-step explanation:

12x+1=3(4x+1)-2

Expand 3(4x+1)-2

12x+3-2

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12x+1=12x+1

Simplify.

0=0

True for all values of x

7 0
3 years ago
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