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3 years ago

16. Rosa deposited $500 in a savings account with a SIMPLE interest rate of 3% per year. If she made

Mathematics

1 answer:

Diano4ka-milaya [45]3 years ago

7 0

30 because 3% of 500 is 15then you multiply that by 2

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Solve x2 = 12x – 15 by completing the square. Which is the solution set of the equation? Solve x2 = 12x – 15 by completing the s

Svetlanka [38]

Answer: $6+\sqrt{21}\ \text{and}\ 6-\sqrt{21}$

Step-by-step explanation:

Given

Quadratic equation is

$x^2-12x+15=0$

Solving by completing the square method

$\Rightarrow x^2-2\cdot 6\cdot x+15=0\\\text{add and subtract 36}\\\Rightarrow x^2-2\cdot 6\cdot x+15+36-36=0\\\Rightarrow x^2-2\cdot 6\cdot x+36+(-36+15)=0\\\text{using}\ (a-b)^2=a^2+b^2-2ab\\\Rightarrow (x-6)^2-21=0\\\Rightarrow (x-6)^2=21\\\Rightarrow x-6=\pm \sqrt{21}\\\Rightarrow x=6\pm \sqrt{21}$

The solution set of the equation is $6+\sqrt{21}\ \text{and}\ 6-\sqrt{21}$

6 0

3 years ago

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A jet travels at 483 miles per hour. Which equation represents

WINSTONCH [101]

Answer:

d=483t

Step-by-step explanation:

If i recall correctly

distance = velocity * time

This means that

d=483t

8 0

3 years ago

How much is 25 pens for $19.75.

Scilla [17]

Answer:

$493.75

Step-by-step explanation:

25 × 19.75 = $493.75

I hope this helps!

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4 years ago

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Convert the Cartesian equation x - 5 = 0 to a polar equation.

mylen [45]

Answer:

r = 5sec(θ)

Step-by-step explanation:

The usual conversion is ...

y = r·sin(θ)

x = r·cos(θ)

The second of these can be used here.

r·cos(θ) -5 = 0

r·cos(θ) = 5

r = 5/cos(θ) = 5sec(θ)

A suitable polar equation is ...

r = 5sec(θ)

5 0

3 years ago

15 POINTS!

Mekhanik [1.2K]

Answer:

Step-by-step explanation:

the 2nd choice looks good Emily

y > x

y > x+2

5 0

3 years ago