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3 years ago

SOMEONE PLEASE HELP ME!!!!! I NEED HELP ON CASE #3

Mathematics

1 answer:

sweet-ann [11.9K]3 years ago

4 0

I feel like I've answered this already, but I could be wrong. Since it took 10 years for the price to increase by 11 cents, it would take around 7-8 years for it to raise by .8. (.52- .44)

Hope this helps!

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malfutka [58]

Divide 47 by 100. you will get a decimal. move the decimal two places the right and there is your percent!

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3 years ago

Jamie purchased a DVD that was on sale for 15% off. The sales tax in her county is 5%. Let y represent the original price of the

Triss [41]

Answer:

1.05(0.85y)

Step-by-step explanation:

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3 years ago

Read 2 more answers

Please help I'll give you brainliest

PSYCHO15rus [73]

Answer:

Equation 1: No solution

Equation 2: Infinity

Equation 3: One solution

Equation 4: Infinity

Equation 5: No solution

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3 years ago

Find+the+positive+value+for+α+if+the+radius+of+the+circle+3x^2+3y-6αx+12y-3α=0+is+4

Alik [6]

Answer:

$\alpha=3$

Step-by-step explanation:

<u>Equation of a Circle</u>

A circle of radius r and centered on the point (h,k) can be expressed by the equation

$(x-h)^2+(y-k)^2=r^2$

We are given the equation of a circle as

$3x^2+3y^2-6\alpha x+12y-3\alpha=0$

Note we have corrected it by adding the square to the y. Simplify by 3

$x^2+y^2-2\alpha x+4y-\alpha=0$

Complete squares and rearrange:

$x^2-2\alpha x+y^2+4y=\alpha$

$x^2-2\alpha x+\alpha^2+y^2+4y+4=\alpha+\alpha^2+4$

$(x-\alpha)^2+(y+2)^2=r^2$

We can see that, if r=4, then

$\alpha+\alpha^2+4=16$

Or, equivalently

$\alpha^2+\alpha-12=0$

There are two solutions for $\alpha$ :

$\alpha=-4,\ \alpha=3$

Keeping the positive solution, as required:

$\boxed{\alpha=3}$

8 0

3 years ago

What is the "k" value of the following function? Is it 3, -2, -3, or 2?

snow_tiger [21]

Answer:

-3

Step-by-step explanation:

we khow that the vertex form of a function is written this way :

f(x)=a(x-h)²+k

the coordinates of the vertex are (h,k) so from the graph we can deduce that k = -3

5 0

3 years ago