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3 years ago

X−3y=1x+y=9

Mathematics

2 answers:

Brrunno [24]3 years ago

7 0

I got this same question on a test, the answer is A.

Ksenya-84 [330]3 years ago

5 0

Answer:

Substitution Property of Equality

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What is the value of √23

yawa3891 [41]

Answer:

Step-by-step explanation:

If you looking for square and square root:

Square: 529

Square root: 4.796 and the longer one,4.79583152331

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3 years ago

Hannah's horse eat 12 pounds of food every day how much food will have a need for the month of January?

Natalka [10]

12 pounds multiplied by 31 as there are 31 days in January.
So she will need 372 pounds.

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3 years ago

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What is 18w-2=10w+14?

NeTakaya

w = 2

BECAUSE

The first step is subtract both sides by 10w. Once you do that you are left with

8w - 2 =+ 14

Then you add both sides by 2, leaving you with

8w = 16

Then you divide by 8, and you get your answer:

w = 2

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4 years ago

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At a particular music store, CDs are on sale at $12.00 for the first one purchased and $9.00 for each additional disc purchased.

kondor19780726 [428]

Maria bought 9 CDs. Hope I helped :)

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3 years ago

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F(n) = 2• (-3)^n

Mashutka [201]

Answer:

$f(1)=-6$

$f(n)=f(n-1)(-3)$

Step-by-step explanation:

We are given that

$f(n)=2\cdot (-3)^n$

We have to complete the recursive formula of f(n).

Substitute n=1

$f(1)=2\cdot (-3)$

$f(1)=-6$

$f(2)=2\cdot (-3)^2=18$

$f(3)=2\cdot (-3)^3=-54$

$\frac{f(2)}{f(1)}=\frac{18}{-6}=-3$

$\frac{f(3)}{f(2)}=\frac{-54}{18}=-3$

It forms geometric sequence because the ratio of two consecutive terms are equal.

Therefore, the recursive formula

$f(n)=f(n-1)r$

$f(n)=f(n-1)(-3)$

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3 years ago

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