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3 years ago

If you are also able to explain this please do! I'd greatly appreciate it!

Mathematics

2 answers:

pogonyaev3 years ago

7 0

You're given a table of x values and an equation. To solve, plug in the values for x.

First box: y=2(-3)-1=-7
Second box: y=2(-2)-1=-5.

See if you can solve the third one.

sasho [114]3 years ago

4 0

^ those are right and the 3rd one is -3 in case you can't get it.

2*-1=-2 -2-1=-3

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Dinner Bill- $28.15, Tax- 8%, Tip- 15% What is the final cost.<br>

aev [14]

Answer is 34.96$ for the final cost.

7 0

3 years ago

Question 12.12. In 2010, the population of a city was 65,903. It was expected to grow at a rate of 0.7% each year.

postnew [5]

$y=Ce^{kx}$

k=0.7%=0.007

$65903=Ce^{.007(0)} \\ 65903=Ce^0 \\ 65903=C(1) \\ C = 65903$

$y=65903e^{0.007(2027-2010)}\\y=65903e^0.229 \\ y = 74231.157$

The best answer is 74,200

8 0

4 years ago

Find the diameter and of each circle. A) circumference = 118mm B) circumference = 1m

kotegsom [21]

Okay so the formula for circumference is

C=(pi)(D)
or
C=(pi)(2)(r)

But since they gave us the diameter we are gonna have to use the first formula.

Now I don’t know if they want u to use 3.14 for pi or the actual number, so i’m gonna assume we are using the actual formula.

So the formula to be able to find the diameter of circle A is going to be:
118/pi.
So put that into your calculator and you get 37.5605mm or 37.56mm.
It depends on what place your instructor wants you to round to.

The formula for circle B is going to be:
1/pi.
So let us put that into our calculator and you get 0.318309mm etc. Or just 0.3183.

I believe that I am correct but if i’m not please correct me.

4 0

3 years ago

Find the arc length of the semicircle. Either enter an exact answer in terms of \piπpi or use 3.143.143, point, 14 for \piπpi an

DedPeter [7]

Answer:

$3.14r$ or $\pi r$

Step-by-step explanation:

Given:

A semicircle.

To find:

Arc length of the semicircle = ?

Solution:

Formula for angle subtended by an arc on the center of circle is given as:

$\theta = \dfrac{l}{r}$

where $l$ is the arc length and

$r$ is the radius of semicircle.

Angle of full circle is $2\pi$

So, angle of semicircle = $\pi$

Using the formula, we can see that:

$l = \theta \times r$

$\Rightarrow l = \pi \times r\\\\OR\\\Rightarrow l = 3.14r$

So, the answer is:

Arc Length of semicircle = $3.14r$ or $\pi r$

6 0

3 years ago

PLEASE HELP ASAP!!!

SashulF [63]

$\sqrt{210}$

There is a theorem in Geometry stating that the square of the tangent segment (ST) is equal to the product of the external secant segment (TR) and the whole secant segment (TQ).

SQ x SQ = TR x TQ
SQ squared = 7 x 30
SQ squared = 210
SQ = $\sqrt{210}$

6 0

3 years ago