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Nataliya [291]
3 years ago
7

Which of the following is not a prime number 157,1057,3163 or 263

Mathematics
1 answer:
Alex787 [66]3 years ago
7 0
Hello!

The answer to your question is the second option, 1057.

1057 is not qualified as a prime number, while the other three provided options can be categorized as prime.

Hope this helps!
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B/3 + 1/7=13 can someone tell me what b is , thanks :))
nikklg [1K]
B is 4 thats what i got
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3 years ago
Simplify 15(2/5+1 1/3)+3
loris [4]
So for order of operations you start inside the parentheses and in order to add the insides you will need a common denominator which would be 15 on the bottom. So for 2/5 it would be 6/15 and for 11/3 would be 55/15 and then added together it would be 61/15. so then you would multiply and get 15(61/15). the 15 in the numerator will cancel with the denominator leaving only 61 and then the final step would be adding the 3 to 61 and the final answer will be 64
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2 years ago
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What is the area surface of the pyramid please do not do any files or links just say the answer and do not guess
poizon [28]

Answer:

448

Step-by-step explanation:

7 0
2 years ago
A contractor combined x tons of a gravel mixture that contained 10 percent gravel G, by weight, with y tons of a mixture that co
White raven [17]

Answer:

The value of x would be \frac{3}{5}y or \frac{3}{8}z

Step-by-step explanation:

Given,

x tons of 10% gravel G mixture is mixed with y ton of 2% gravel G to obtain  5% gravel mixture,

Thus, gravel G in x ton + gravel in y ton = gravel G in the resultant mixture,          

⇒ 0.1x + 0.02y = 0.05(x+y),

0.1x - 0.05x = 0.05y - 0.02y

0.05x = 0.03y

\implies x = \frac{0.03}{0.05}y=\frac{3}{5}y----(1)

Now, resultant mixture is z ton,

i.e. z=x+y

\implies y = z - x

From equation (1),

x=\frac{3}{5}(z-x) = \frac{3}{5}z-\frac{3}{5}x

x+\frac{3}{5}x=\frac{3}{5}z

\frac{8}{5}x=\frac{3}{5}z

x=\frac{3}{8}z

3 0
3 years ago
A pound is about .45 kg. If I collected 3lbs of aluminum , how many kg. Did I collect ?
icang [17]

Answer:

You collected 1,395 kg.

Step-by-step explanation:

Since each pound would be 45 kg and you collected 31 pounds more then you would have to multiply 45 times 31.

3 0
3 years ago
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