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3 years ago

Learn with an example

Mathematics

1 answer:

Yuki888 [10]3 years ago

8 0

Answer:

128.00

Step-by-step explanation:

7%x100=$21.40. Add go $107.00+21.40=the total cost. $128.40

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2 years ago

The equation 6x - 5y = 14 is written in standard form. Which point lies on

dimaraw [331]

Answer= H (-1, -4)

Explanation= 6(-1) - 5(-4) = 14
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2 years ago

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7nadin3 [17]

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3 years ago

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NO LINKS!! Use the method of substitution to solve the system. (If there's no solution, enter no solution). Part 11z

Roman55 [17]

Answer:

$(x,y)=\left(\; \boxed{-1,-8} \; \right)\quad \textsf{(smaller $x$-value)}$

$(x,y)=\left(\; \boxed{5,16} \; \right)\quad \textsf{(larger $x$-value)}$

Step-by-step explanation:

Given system of equations:

$\begin{cases}y=x^2-9\\y=4x-4\end{cases}$

To solve by the method of substitution, substitute the first equation into the second equation and rearrange so that the equation equals zero:

$\begin{aligned}x^2-9&=4x-4\\x^2-4x-9&=-4\\x^2-4x-5&=0\end{aligned}$

Factor the quadratic:

$\begin{aligned}x^2-4x-5&=0\\x^2-5x+x-5&=0\\x(x-5)+1(x-5)&=0\\(x+1)(x-5)&=0\end{aligned}$

Apply the zero-product property and solve for x:

$\implies x+1=0 \implies x=-1$

$\implies x-5=0 \implies x=5$

Substitute the found values of x into the second equation and solve for y:

$\begin{aligned}x=-1 \implies y&=4(-1)-4\\y&=-4-4\\y&=-8\end{aligned}$

$\begin{aligned}x=5 \implies y&=4(5)-4\\y&=20-4\\y&=16\end{aligned}$

Therefore, the solutions are:

$(x,y)=\left(\; \boxed{-1,-8} \; \right)\quad \textsf{(smaller $x$-value)}$

$(x,y)=\left(\; \boxed{5,16} \; \right)\quad \textsf{(larger $x$-value)}$

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1 year ago

Read 2 more answers

3x+2y=4 8x+5y=9 Please solve using Cross multiplication method.

ch4aika [34]

Hello, Please refer the photo attachment for your question's answer. The final answer is :-

x= -2, y= 5

Hope it helps you...

Answered by Benjemin

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2 years ago