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AURORKA [14]
3 years ago
8

The fundraising group collected the quarters from the school's wishing well. The group arranged the quarters into 8 piles and of

20 quarters. Let q be the number of quarters in the well. How much money in dollars did the group collect?
A.$160
B.$4,000
C. $40
D.$1,600
Mathematics
1 answer:
Mariulka [41]3 years ago
7 0
8•20=q. Multiply the number of piles by the number of quarters in each pile: 8•20=160, there were 160 quarters. Now to find how much they made multiply the number of quarters by how much 1 quarter is: 160•.25=40 they made $40 :)
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What are two numbers multiplied together to get 15 but add to be 12?
KiRa [710]
So x times y=15
x+y=12
solve
x+y=12
subtract x from both sides
y=12-x
subsitute
xy=15
x(12-x)=15
distribute
12x-x^2=15
subtract (12x-x^2) from both sides
0=x^2-12x+15
use quadratic formula which is
x=\frac{ -b+/- \sqrt{b^{2}-4ac} }{2a}
where you have
0=ax^2+bx+c
so
a=1
b=-12
c=15
subsitute
x=\frac{ -(-12)+/- \sqrt{-12^{2}-4(1)(15)} }{2(1)}
x=\frac{ 12+/- \sqrt{144-60} }{2}
x=\frac{ 12+/- \sqrt{84} }{2}
x=\frac{ 12+/- 2\sqrt{21} }{2}
x=6+/- \sqrt{21}
x=6+ \sqrt{21} or 6- \sqrt{21} or aprox
x=10.5826 or 1.41742
the numbers are 10.5826 and 1.41742






3 0
4 years ago
In 1990 the population of the US was approximately 249 m. In 2014 the population was about 317 m. Determine the percent increase
Ivahew [28]

Answer:

27,3%

Step-by-step explanation:

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4 0
3 years ago
If A=(3,2) and B=(5,7) be two points , find the unit vector along BA
Alexeev081 [22]
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Hope this helps!
5 0
3 years ago
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photoshop1234 [79]

Answer:

Either -2 or + 1

Step-by-step explanation:

I can't tell u exactly because I don't know the answer choices.

6 0
3 years ago
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Natasha2012 [34]

Answer:

The teacher should divide the amount of students by 5, that way they'll find how many groups they'll have. And the amount of groups they'll have is 6 groups of 5 students, you didn't ask for this part but I decided it'd be best to add it. Hope this helps, have an amazing day you awesome human! ^w^

Step-by-step explanation:

8 0
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