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Paladinen [302]
3 years ago
9

At a school, 4 out of every 7

Mathematics
2 answers:
Slav-nsk [51]3 years ago
8 0
Answer: 60
explanation:you need to find 4/7 of 105. 1/7(105/7) =15
15x4=60
luda_lava [24]3 years ago
5 0

Answer:

60 girls play sports

Step-by-step explanation:

#1- divide 105 by 7=15

#2- multiply 4 by 5= 60

therefore 60 of the 105 girls play sports

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Do the lines -x+5y=22 and 7x-2y=19 intersect
melomori [17]
Yes, they intersect at roughly (4.2,5.2).
3 0
4 years ago
the intensity, I, of light varies inversely as the square of the distance, D2 , from the light source. If I is 150 units when D
podryga [215]

\bf \textit{\underline{x} varies inversely with }\underline{z^5} ~\hspace{5.5em} \stackrel{\textit{constant of variation}}{x=\cfrac{\stackrel{\downarrow }{k}}{z^5}~\hfill } \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ \stackrel{\textit{\underline{I} varies inversely with }\underline{D^2}}{I = \cfrac{k}{D^2}} \qquad \qquad \textit{we also know that } \begin{cases} I=150\\ D=6 \end{cases}

\bf 150=\cfrac{k}{6^2}\implies 150=\cfrac{k}{36}\implies 5400=k~\hfill \boxed{I=\cfrac{5400}{D^2}} \\\\\\ \textit{when I = 24, what is \underline{D}?}\qquad \qquad 24=\cfrac{5400}{D^2}\implies D^2=\cfrac{5400}{24} \\\\\\ D^2=225\implies D=\sqrt{225}\implies D=15

5 0
4 years ago
The area of a triangular flower bed in the park has an area of
blagie [28]

Answer:

b = 24 ft

h = 10 ft

Step-by-step explanation:

120 = ½hb

120 = ½h(3h - 6)

240 = h(3h - 6)

240 = 3h² - 6h

 80 = h² - 2h

    0 = h² - 2h - 80

    0 = (h - 10)(h + 8)

    h = 10 ft or -8 ft

 we ignore -8 as it makes no sense for a triangle side length.

b = 3(10) - 6 = 24 ft

8 0
3 years ago
If shelly rans 3 miles each week and cam runs 8 times mora than shelly. HOW MANY miles does cam run in 3 weeks?
algol [13]
The correct answer is 72
8 0
3 years ago
A pet store owner has a 1/2 -pound bag of dog treats treats that she divides evenly among 16 dogs.
Margarita [4]

Answer:

0.03125

Step-by-step explanation:

YEP THAT'S THE ANSWERRR DSJJZJZ

7 0
3 years ago
Read 2 more answers
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