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3 years ago

What is three fourths plus four fifths minus seven tenths

Mathematics

2 answers:

alina1380 [7]3 years ago

6 0

Answer:

0.85

Step-by-step explanation:

lidiya [134]3 years ago

3 0

Answer:

17/20

Step-by-step explanation:

3/4 + 4/5 - 7/10

1. Find the LCD (Least Common Denominator). The LCD is 20.

2. 20/4=5. 5*3=15. So, 3/4 becomes 15/20.

3. 20/5=4. 4*4=16. So, 4/5 becomes 16/20.

4. 20/10=2. 2*7=14. So, 7/10 becomes 14/20.

5. Your new equation is 15/20 + 16/20 - 14/20.

6. Solve from left to right.

7. 15/20 + 16/20= 31/20.

8. 31/20 - 14/20= 17/20.

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Can I have some help, please?

Marianna [84]

Answer:

$-3(t+1)(8t-3)$

Step-by-step explanation:

First, factor both the denominators completely:

$9-24t\\= 3(3-8t)\\= 3(-8t+3)\\= -3(8t-3)$

$8t^2+5t-3\\= 8t^2+8t-3t-3\\= 8t(t+1)-3(t+1)\\= (8t-3)(t+1)$

Now, we can see that the factors of the first denominator are -3 and 8t-3.

The factors of the second denominator are t+1 and 8t-3.

To find the LCD, multiply all of these factors together:

$-3(t+1)(8t-3)$

Notice how we only multiply 8t-3 in the equation once. This is because it was present in both denominators, unlike the other factors.

I hope this helps!

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Mkey [24]

Answer:

Step-by-step explanation:

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ahrayia [7]

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