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3 years ago

4x+3y= -1 5x+4y= -1 solving by emilination or subtraction please help :)

Mathematics

1 answer:

bogdanovich [222]3 years ago

6 0

You would solve using elimination.
y=1
x=-1

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What are the solutions to the quadratic equation (5y+6)2=24

yulyashka [42]

The value of y is, $y=\frac{2\sqrt{6}-6}{5},\:y=\frac{-2\sqrt{6}-6}{5}$

We have given that,

$\left(5y+6\right)^2=24$

We have to determine the value of y,

<h3>What is the formula for the quadratic equation?</h3>

$\mathrm{For\:}\left(g\left(x\right)\right)^2=f\left(a\right)\mathrm{\:the\:solutions\:are\:}g\left(x\right)=\sqrt{f\left(a\right)},\:\:-\sqrt{f\left(a\right)}$

Therefore,we get

$5y+6=\sqrt{24}$

$5y+6=2\sqrt{6}$

$\mathrm{Subtract\:}6\mathrm{\:from\:both\:sides}$

$5y+6-6=2\sqrt{6}-6$

$5y=2\sqrt{6}-6$

$\frac{5y}{5}=\frac{2\sqrt{6}}{5}-\frac{6}{5}$

$y=\frac{2\sqrt{6}-6}{5}$

$y=\frac{2\sqrt{6}-6}{5},\:y=\frac{-2\sqrt{6}-6}{5}$

Therefore the value of y is,

$y=\frac{2\sqrt{6}-6}{5},\:y=\frac{-2\sqrt{6}-6}{5}$

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2 years ago

Can someone give me an example of substitution

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Answer:

Substituton is like being a back up to anything and for anuone

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3 years ago

Walter's savings account has a balance of $273. After 5 years, what will the amount of interest be at 5% compounded quarterly?

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Given:
Principal = $273
Interest rate = 5% compounded quarterly
time = 5 years

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A = amount of money accumulated plus interest
P = principal
r = interest rate (in decimal form)
n = number of times the interest is compounded per year
t = total number of years the amount is deposited

A = $273 (1 + 0.05/4)⁴*⁵
A = $273 (1 + 0.0125)²⁰
A = $273 (1.0125)²⁰
A = $273 * 1.2820
A = $349.99

$349.99 - 273 = $76.99

The compounded interest amounts to $76.99

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3 years ago

How many cakes can you make having 3 2/3 cups of flour,if for one cake you need 1/3 cup of flour?

shutvik [7]

Answer:

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OlgaM077 [116]

Answer:

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