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Hoochie [10]
3 years ago
8

ashley spends $12 to buy 3 pencils and 6 rulers. Jack spends $8 to buy 5 pencils and 2 rulers. what is the cost of 2 pencils and

2 rulers?
Mathematics
2 answers:
Sveta_85 [38]3 years ago
6 0

Answer:

$ 3 left ashley money

$ 1 left  jacks money

$ 8 left ashley money

$ 4 left jacks money

Step-by-step explanation

3 pencils + 6 rulers = 12 - 9 = 3

5 pencils +  2 rulers = 8 - 7 = 1

12 - 4 = 8

8 - 4 = 4

masya89 [10]3 years ago
4 0

Answer:

I am guessing 2 rulers are two dollars and 2 pencil are 4 dollars

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Goryan [66]

Answer:

a.Converge

b.Diverge

Step-by-step explanation:

We are given that

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\lim_{n\rightarrow \infty}A_n=\lim_{n\rightarrow \infty}\frac{6n}{-4n+9}=\frac{6n}{n(-4+\frac{9}{n})}

\lim_{n\rightarrow \infty}\frac{6}{-4+\frac{9}{n}}=\frac{6}{-4}=\frac{-3}{2}

Because \frac{9}{\infty}=0

Hence, sequence An converges to \frac{-3}{2} when n tends to infinity or - infinity.

\sum_{n=1}^{\infty}An=\sum_{n=1}^{\infty}\frac{6n}{-4n+9}=diverges

Necessary condition for a series to converge :

an\rightarrow 0 when n tends to infinity .

But A_n tends to \frac{-3}{2}when n tends to infinity.

Therefore, given series is divergent.

5 0
3 years ago
6. AB has coordinates A(-5,9) and B(7,-7). Points P, Q, and T are collinear
MrRissso [65]

Answer:

C) QT

Step-by-step explanation:

We must first find the coordinates of C(x,y) which divides AB in the ration m:n=3:2.

We use the formula

x=\frac{mx_2+nx_1}{m+n}

and

y=\frac{my_2+ny_1}{m+n}

We plug in the coordinates of A(-5,9) and B(7,-7) and m=3, n=2 to get:

x=\frac{3*7+2*-5}{3+2}

x=\frac{21-10}{5}

x=\frac{11}{5}

and

y=\frac{3*-7+2*9}{3+2}

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C has coordinates  (\frac{11}{5},-\frac{3}{5})

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Which Roman "digits" cannot be repeated.
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