1) The sum of 2 prime numbers is ALWAYS even, so if x and y are prime number,. then (x+y)/7 = z². In this case either x = 2 or y = 5 (or vice vera). This is the only possibility to be divisible by 7 . Then (5+2)/7 = 1² = 1
2) 5 pipes → 2 hours → 2 pools
then 1 pipe takes (5x2) 10 hours to fill 2 pools
or 1 pipe takes (10/2) 5 hours to fill 1 pool
3) It's 6/30 = 0.2 or 20%
4) 35% represent 7 Students, 100% of the class represent x students:
35%/7 = 100%/x
0.35/7 = 1/x (Cross multiplication) →0.35x = 7 and x = 7/0.35 → x = 20 students
5) Let K be the age of Katie and B her brother's
K + 2 = B OR K = x - 2 (Today)
In 12 years (B+12), B will be twice K (remember K = B-2) →
B+12 = 2(K) OR B+12 = 2(B-2)
B+12 = 2(B-2) →
B+12 = 2B - 4→
12 + 4 = B and B = 16. If the brother is 16, then Kate is 14
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Answer:
I believe that it is .875 or 7/8 but im not sure
Step-by-step explanation:
You would make 3,600a year. Hope this helped!
Answer:
the answer is in the photo.
hope it helps.
Hello!
You put in the know values for x or y
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(-6, ?)
We know that x is -6
6y + 5(-6) = -30
Combine like terms
6y + -30 = -30
Add 30 to both sides
6y = 0
y = 0
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(?, 5)
We know that y is 5
6(5) + 5x = -30
Combine like terms
30 + 5x = -30
Subtract 30 from both sides
5x = -60
Divide both sides by 5
x = -12
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The answers are (-6, 0) and (-12, 5)
Hope this helps!
