3 years ago

Which quantity is proportional to 45/3

Mathematics

1 answer:

Eduardwww [97]3 years ago

7 0

Answer:

15/1, 90/6

Step-by-step explanation:

45/3 = 15

Anything not equal to 15 is not a solution

90/10 = 9

90/6 = 15

15/1 = 15

135/6 = 22.5

30/1 = 30

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3 years ago

Find the 4th term if the sequend in which a1 = 2 and a n+1 = -4a n + 2

pshichka [43]

$a_n_+_1=-4a_n_+_2$

dividing both sides by -4, we get:

$a_n_+_2=- \frac{a_n_+_1}{4}$

this means, each term is its previous term divided by -4.

now we can construct the sequence as follows:

$a_1=2$

$a_2=- \frac{a_1}{4}= - \frac{2}{4}= -\frac{1}{2}$

$a_3=- \frac{a_2}{4} =- \frac{ \frac{1}{2} }{4}=- \frac{1}{8}$

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3 years ago

Allen runs 8 miles in 3 hours at a steady pace. how long does it take him to run 3 miles

Amiraneli [1.4K]

$\begin{array}{ccc}8miles&-&3hours\\\\3miles&-&xhours\end{array}\\\\8x=3\cdot 3\\\\8x=9\ \ \ \ /:8\\\\x=\frac{9}{8}\\\\x=1\frac{1}{8}\ (h)$

$v=\frac{8}{3}\ mph\\\\s=3miles\\\\t=s:v\\\\t=3:\frac{8}{3}=3\cdot\frac{3}{8}=\frac{3}{1}\cdot\frac{3}{8}=\frac{9}{8}=1\frac{1}{8}\ (h)$

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3 years ago

Read 2 more answers

If y varies directly as x, and y = 12 when x = 72, then what is the value of x when y = 3 ?

qwelly [4]

Answer:

x = 18

Step-by-step explanation:

difference between y = 12, x=72 is 6

so if y = 3 then multiply 3×6 = 18

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2 years ago