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3 years ago

What is the formula for the system of equation usign the substitution?

1 answer:

7 0

We can substitute y in the second equation with the first equation since y = y. The solution of the linear system is (1, 6). You can use the substitution method even if both equations of the linear system are in standard form. Just begin by solving one of the equations for one of its variables.

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Don't understand please help with answer

Taya2010 [7]

((-4)^5)^8 / ((-4)^7)^3

= (-4)^40 / (-4)^21

= (-4)^20

4 0

3 years ago

Read 2 more answers

Jackie cut a 2 yard spool into 5 equal lengths of ribbon?

lidiya [134]

5 units = 2 yd.
1 unit = 2/5
Each piece of ribbon is 2/5 yd. long.

6 0

3 years ago

They estimate that their current (older) fridge, which they got for free, costs them about $17 a month in electricity charges to

Eddi Din [679]

Step-by-step explanation:

Step one:

given

current (older) fridge

electricity charges= $17 monthly

maintenance costs= $220

let the number of months be x

and the total cost be yo

the expression for the cost for the old fridge is

yo=220+17x---------1

New fridge

electricity charges= $6 monthly

costs= $1,050

let the number of months be x

and the total cost be yn

the expression for the cost for the old fridge is

yn= 1050+6x---------2

Hence the system of equation for the situation is

yo=220+17x---------1

yn= 1050+6x---------2

Step two

for 10 years there are 12*10= 120 months

put x= 120 in both expressions and compare the total

yo=220+17(120)---------1

yo=220+2040

yo=$2,260

yn= 1050+6(120)---------2

yn=1050+720

yn=$1770

Based on the analysis it will be less expensive to get the new fridge, hence buying the new fridge is worth it.

3 0

3 years ago

4.18 repeating as a fraction

olga_2 [115]

Answer: it’s 148 also i don’t know if you mean 4.18 as a fraction?

Step-by-step explanation:

6 0

2 years ago

The table below shows the squares of different numbers:

gogolik [260]

The table in Part A represents y as a function of x. This means that the value of Y is dependent on the value of X. The table can be represented by an equation that describes the relation of X and Y:
$y = x^{2}$ or $f(x) = x^{2}$
By substituting any value of X, you get a specific value of Y based from the given relationship, thus Y is a function of X.

For Part B, the value of f(150) is $470 and it represents the total cost for borrowing a rowboat for 150 hours. By substituting the value of x = 150 into the function, you get the total cost:
$f(x) = 20 + 3x \\ where \\ x = 150 \\ f(150) = 20 + 3(150) \\ f(150) =20 + 450 \\ f(150) = $ 470$

4 0

3 years ago