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antiseptic1488 [7]
2 years ago
13

6 pencils cost 54p how much will 8 pencils cost? can you please show me the working out..

Mathematics
2 answers:
Nadya [2.5K]2 years ago
8 0
First you have to put them both into fractions. 6/54 and 8/X X being the value your trying to find. So your going to cross multiply and divide. 8 • 54 and then divided by 6. 8 • 54= 432. Then 432 divided by 6 equals 72.
Paraphin [41]2 years ago
7 0
Well first you have to find the unit rate, or how many "p" each pencil costs. So you take 54 and divide it by 6, and you get 9. So each pencil costs 9 p, so you take 9 and multiply it by 8. That gets you 72, so 8 pencils cost 72p.
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8 0
3 years ago
H=-16t^2+46t+6 after how many seconds will the ball hit the ground?
ANEK [815]
Ball hit the ground is when the function equals zero
0=-16t^2+46t+6
we can't factor so use quadraticformula

for
ax^2+bx+c=0
x=\frac{-b+/- \sqrt{b^2-4ac} }{2a}
x=\frac{-46+/- \sqrt{46^2-4(-16)(6)} }{2(-16)}
x=\frac{-46+/- \sqrt{2116+384} }{-32}
x=\frac{-46+/- \sqrt{2500} }{-32}
x=\frac{-46+/- 50 }{-32}
x=\frac{-46+ 50 }{-32} or \frac{-46- 50 }{-32}
x=\frac{4}{-32} or x=\frac{-96}{-32}
x=-1/6 or x=3

we cannot have negative time because time starts at 0
disregard -1/6 as a possible answer


answer is after 3 seconds

4 0
3 years ago
Adjacent angles have no common interior points. A.)Always. B.)Sometimes. C.)Never
irina [24]
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6 0
3 years ago
Read 2 more answers
Helppppppp meeeeeeeee​
juin [17]
Pretty sure it’s 148.10% because ofc it’s 100% and then 468-152=152 . Then 152 is 48.10 % of 316 so add that to the 100%
7 0
2 years ago
The perimeter of a triangle is 61 in. The shortest side is 8 in. less than the longest side. The middle side is 19 in. less than
Marianna [84]

Answer:

since the lengths are consecutive odd numbers and the perimeter of the triangle is 51cms. Let x be the unknown length.

so 3x=51 ; x=17 . now the sides can be 15cms, 17cms, 19cms.

check Add them up it is 51cms  which is the perimeter and the consecutive odd numbers

6 0
3 years ago
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