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Marina CMI [18]
4 years ago
15

Need help + Fast! I suck at math

Mathematics
1 answer:
liberstina [14]4 years ago
3 0
Your answer is C: c = 2.50 + 2.50n

To get this answer I looked at the possible answers and inserted the numbers from the chart to see which fit.
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PLEASE HELP ASAP!!!! 100% CORRECT ANSWERS ONLY PLEASE!!!! I CANNOT RETAKE THIS
valkas [14]
The first statement is true. Reasoning below.

= = =

We want to find the area of a fixed circle, so we can throw out the last option. If r changes at all, then so does the area of the circle.

For s to increase would require using a circumscribed polygon with less sides. Again, the circle is fixed, so only a certain length s can fit inside the circle. This eliminates the third option.

Note that if we use a regular hexagon, then s=r automatically, because the component triangles that make up the hexagon are equilateral. Increasing h would require that we use a polygon with more sides, which would simultaneously make s stray away from r. In other words, if h increases, then s decreases, so we can never eventually have s\to r (r is fixed).

That leaves the first option. Indeed, as n increases, we get a polygon that looks increasingly rounder and more like a perfect circle. At the same time, that means h gets larger, but would be bounded above by the circle's perimeter. So as h increases indefinitely, it will eventually "be equal" (in the limit sense) to r, so that rh\to r^2.
6 0
3 years ago
3x4-x3 +8x2+5x+3<br> x2-x+3
Firlakuza [10]

Answer:  35x+3

Step-by-step explanation:

7 0
4 years ago
Read 2 more answers
HELP!<br> (5 + x)(5 - x) = 7 is a quadratic equation.<br> true or false
arlik [135]
True, this equation is a quadratic equation,.
5 0
3 years ago
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Can someone please help me solve this
AURORKA [14]

Answer:

1. 1.25

2. 0.8

Step-by-step explanation:

1. 2 : 2.5 = 1.25 Ratio from P To Q - 1 : 1.25

2. 2.5 : 2 = 0.8 Ratio from Q to P - 1 : 0.8

1. All you have to do is find the corresponding sides(meaning similar) and the compare them from one to another.

Example:

I know 5 and 4 are corresponding sides because they are similar. The ratio is Q to P we can find by writing them down. It can be written like this.

5:4 is so when we multiply this ratio from any side of Q we will get the correpoding side from P.

5:4 ratio = 1 : 0.8 - So the ratio is 0.8

There this is another ratio that we can compare to.

Now let’s say we need to find when the one of the P side is 4 and what would be the corresponding side.

4 x 1.25(ratio from P to Q) = 5

We can also find when the P side is 3 what would be Q’s corresponding side. Which is the ratio from P to Q or 1.25.

So just multiply 3 by 1.25.

3 x 1.25 = 3.75

3.75 x 0.8 = 3

4 0
3 years ago
Read 2 more answers
Factorise 6x²-14x-12​
maksim [4K]

Answer:

2(x - 3)(3x + 2)

Step-by-step explanation:

Given

6x² - 14x - 12 ← factor out 2 from each term

= 2(3x² - 7x - 6) ← factor the quadratic

Consider the factors of the product of the coefficient of the x² term and the constant term which sum to give the coefficient of the x- term.

product = 3 × - 6 = - 18 and sum = - 7

The factors are - 9 and + 2

Use these factors to split the x- term

3x² - 9x + 2x - 6 ( factor the first/second and third/fourth terms )

= 3x(x - 3) + 2(x - 3) ← factor out (x - 3) from each term

= (x - 3)(3x + 2)

Thus

3x² - 7x - 6 = (x - 3)(3x + 2) and

6x² - 14x - 12 = 2(x - 3)(3x + 2) ← in factored form

8 0
3 years ago
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