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3 years ago

Is y=2^x -15 a linear equation

Mathematics

2 answers:

enyata [817]3 years ago

8 0

No, it’s not a linear equation.

Vlad1618 [11]3 years ago

3 0

Answer:

Step-by-step explanation:

It is a non linear equation

A linear equation is and equation in which all the powers of variables and constants are 1 while here the power of 2 is x

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PLEASE ANSWER ASAP!! WILL GIVE 50 POINTS! AND BRAINLIST!

levacccp [35]

$\frac{3}{5} - \frac{1}{4} = \frac{7}{20}$
then
$\frac{7}{20} \div \frac{7}{10} = \frac{1}{2}$

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3 years ago

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 <u>zero-product property</u> 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 <u>second equation</u> 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)}$

6 0

1 year ago

Read 2 more answers

While Diane was visiting her sister in Kingwood, she bought a bunch of balloons that was marked down 20% from an original price

shepuryov [24]

Answer:

$4.34

Step-by-step explanation:

Given the information:

The original price: $5
Discount : 20%
Tax: 8.5%

We can find out the actual price that Diane bought a bunch of balloons that was marked down 20% is:

= the original price (100% - discount rate)

= 5(100% -20%)

= $4

The tax amount she need to pay is:

= The actual price*tax rate

= $4*8.5%

= $0.34

=> the total cost of the bunch of balloons :

The actual price + tax price

= $4 + $0.34

= $4.34

Hope it will find you well.

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3 years ago

This week laptops are 25% off. If a laptop cost $340 what is it's sale price?

Andrej [43]

The sale price is $255

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Shtirlitz [24]

Answer:

Step-by-step explanation:

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