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I am Lyosha [343]
2 years ago
15

What is 5/7 + 3/7??????

Mathematics
2 answers:
marusya05 [52]2 years ago
7 0
Since the denominators are already alike we can just add the numerators together. 5+3 = 8. So we have 8/7. Since 8/7 is an  incomplete fraction we have to turn it  into a regular fraction.  We do this by dividing 8 and 7. 
So 7 goes into 8 1 time, 1 times 7 is seven, and 8 - 7 = 1. So we get 1 1/7. 
you answer is 1 1/7 
I hope this helps!

vaieri [72.5K]2 years ago
6 0
8/7 as an improper and 1 and 1/7 for proper.
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Does anyone know why I only got 2/3 marks, and can you explain how to get 3 marks please. Please answer.
Brums [2.3K]

Answer:

294cm²

Step-by-step explanation:

You didn’t convert from meters to centimeters.

It was 2.94m².

That equals 294cm².

5 0
2 years ago
When solving negative one over five(x − 25) = 7, what is the correct sequence of operations?
Rufina [12.5K]
Add 25 to both sides x-25 +25 =7 +25
x =32 
7 0
3 years ago
<img src="https://tex.z-dn.net/?f=%20%5Ctimes%20%20%2B%208%20%5Cgeqslant%20%209" id="TexFormula1" title=" \times + 8 \geqslant
Annette [7]

<em />

8.   Which one of the following examples represents a repeating decimal?

    

  A. 4.252525

  B. 1.111114

  C. 0.123123

  D. 0.777777

8 0
3 years ago
A mattress store sells only king, queen and twin-size mattresses. Sales records at the store indicate that the number of queen-s
Nitella [24]

Answer:

The probability that the next mattress sold is either king or queen-size is P=0.8.

Step-by-step explanation:

We have 3 types of matress: queen size (Q), king size (K) and twin size (T).

We will treat the probability as the proportion (or relative frequency) of sales of each type of matress.

We know that the number of queen-size mattresses sold is one-fourth the number of king and twin-size mattresses combined. This can be expressed as:

P_Q=\dfrac{P_K+P_T}{4}\\\\\\4P_Q-P_K-P_T=0

We also know that three times as many king-size mattresses are sold as twin-size mattresses. We can express that as:

P_K=3P_T\\\\P_K-3P_T=0

Finally, we know that the sum of probablities has to be 1, or 100%.

P_Q+P_K+P_T=1

We can solve this by sustitution:

P_K=3P_T\\\\4P_Q=P_K+P_T=3P_T+P_T=4P_T\\\\P_Q=P_T\\\\\\P_Q+P_K+P_T=1\\\\P_T+3P_T+P_T=1\\\\5P_T=1\\\\P_T=0.2\\\\\\P_Q=P_T=0.2\\\\P_K=3P_T=3\cdot0.2=0.6

Now we know the probabilities of each of the matress types.

The probability that the next matress sold is either king or queen-size is:

P_K+P_Q=0.6+0.2=0.8

8 0
3 years ago
Is the following relation a function?<br><br> {(3, −2), (1, 2), (−1, −4), (−1, 2)}
mel-nik [20]

Answer:

<h2>It's not a function.</h2>

Step-by-step explanation:

A function is a process or a relation that associates each element x of a set X, to a single element y of another set Y.

We have:

{(3, -2), (1, 2), (-1, -4), (-1, 2)}

for x = -1 are two values of y = -4 and y = 2. Therefore this realtion is not a function.

3 0
3 years ago
Read 2 more answers
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