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3 years ago

Can someone please explain to me how I do this?

Mathematics

2 answers:

Nastasia [14]3 years ago

6 0

Answer:

x = 12.77 cm

Step-by-step explanation:

In this problem, we will use trigonometry to find the missing value. I will use the 70 degree angle to find it.

12cm is the opposite value for 70, and x is the hypotenuse. We will use Sine to solve this problem.

Since we are missing the hypotenuse, we set up the equation like this -

x = 12/Sin(70)

This leads us to our answer, x=12.77 cm (rounded)

Hunter-Best [27]3 years ago

6 0

Check the picture below.

make sure your calculator is in Degree mode.

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When graphing a circle can the the radius be negitive?

Lerok [7]

No. The circle can be composed of completely negative coordinates, but the radius is always a positive value. You can prove this by plugging any point and the center into the distance formula.

3 0

3 years ago

What is the equatipn of the linear graph? (-4, 6). (1, -9)

dusya [7]

Answer:

y = -3x - 6

Step-by-step explanation:

first, find the slope

(-4, 6)

(1, -9)

remember the equation for the slope

$\frac{y_{2}-y_{1}}{x_{2} - x_{1}} }$

insert given points

$x_{1} = -4\\y_{1} = 6\\\\x_{2} = 1\\y_{2} = -9$

((-9) - (6)) / ((1) - (-4))

simplify

( -9 - 6) / (1 + 4)

= -15/ 5

= -3

now insert it into the equation of the line

remember, the equation of the line is

y = mx + b

where "m" is the slope

and "b" is the y-intercept

to find "b", you just have to plug in a point that is found on the line

we know that (-4, 6) and (1. -9) is found on the line, so let's just use (-4, 6) for this problem

y = mx + b

substitute in the slope of this line

y = -3x + b

now substitute in the given points

6 = -3 * -4 + b

and solve it like any algebra problem, by inverse operations and simplifying

6 = 12 + b

-12 -12

-6 = b

so the equation of the line is

y = -3x -6

3 0

3 years ago

Does anyone know the answer to this ?? PLEASE HELP.

aleksandrvk [35]

Answer:

2,365,200,000 times

Step-by-step explanation:

Given :

Average heartbeat rate = 60 times/minute
Avg. human lifespan = 75 years

To Find :

Number of heartbeats in lifetime of 75 years

Solving :

Let the number we require be n
n = average heartbeat rate x 60 x 24 x 365 x 75
n = 60 x 60 x 24 x 365 x 75
n = 3600 x 24 x 365 x 75
n = 86400 x 365 x 75
n = 31536000 x 75
n = 2,365,200,000 times

5 0

2 years ago

Simplify the sum. Answers in the attachment. Will award brainliest.

pychu [463]

Answer:

your answer is C.

Step-by-step explanation:

7 0

3 years ago

Jake is solving x^2-6x+5=0 by completing the square his steps are shown below step 1. x^2-6x=-5 step 2. x^-6x+9=-5+9 step 3. (x-

damaskus [11]

Answer:

Jake's error in step 3

Step-by-step explanation:

we have

$x^{2} -6x+5=0$

Complete the square

step 1

Group terms that contain the same variable, and move the constant to the opposite side of the equation

$x^{2} -6x=-5$

step 2

Complete the square. Remember to balance the equation by adding the same constants to each side

$x^{2} -6x+9=-5+9$

$x^{2} -6x+9=4$

step 3

Rewrite as perfect squares

$(x-3)^{2}=4$

Jake's error in step 3

He placed 6 instead of 3 in the left side

step 4

take square root both sides

$\sqrt{(x-3)^2} =\sqrt{4}$

step 5

$(x-3)=\pm2$

step 6

$x=3\pm2$

step 7

x=5 and x=1

7 0

3 years ago