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Lerok [7]
3 years ago
11

This is my math homework it is do today plz help me i need it before 3:10 pm

Mathematics
1 answer:
ollegr [7]3 years ago
8 0

use quizzes and type line plot and your question it helps alot

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If cos theta =-2/3, which of the following are possible
Dima020 [189]
Well, the cos(∅) is negative in the second and third quadrants.  If you are solving for theta, you would use the inverse of the cos or arccos
cos(x) = ( \frac{-2}{3} ) take the inverse of both sides to get:
x = arccos(-2/3) now evaluate the right
x = 131.8103149 degrees
to find your second solution, subtract your reference angle from 360 degrees.
360 - 131.8103149 = 228.1896851 degrees

Now the period of cos is 2π or 360 degrees. So if you want to consider all possible solutions, you would need to add/subtract 360n to both solutions above.. 

Not sure if this is what you're looking for, but thought I would leave it here for you just in case... As a side note, you could do this problem in radian measurement as well.
6 0
3 years ago
Find the amount financed and the finance charge in dollars for the following problem. choose the correct answers. josh hayes pur
melisa1 [442]
$350 * 30/100 = $ 105 which is down payment.
$350 - $105 = $245 which is left.
But he will pay $24.50 * 12 = $294 instead.
$294 - $245 = $49

He will pay $49 more.

He paid $105 as down payment and will pay $294 more with 12 months.

Total will be $105 + $294 = $399
7 0
3 years ago
PLEASE HELP 7TH GRADE MATH
stiks02 [169]

Answer:

2) 7.4 meters per second

Step-by-step explanation:

I divided 400 meters by 54 seconds

4 0
3 years ago
What is the difference in height between an albatross flying at 100 m above the surface of the ocean and a shark swimming 30 m b
Lelechka [254]

Answer:  130 meters

Step-by-step explanation:

We have to let the "surface of the ocean" be at 0 height.

So,

anything above surface has POSITIVE height

and anything below surface has NEGATIVE height

The albatross is 100 m above, so we can say its height is:

+100 meters

The shark is 30 m below, so we can say its height is:

-30 meters

The difference in height is thus:

100 - (-30) = 100 + 30 = 130 meters

6 0
3 years ago
Wright in point-slope form, slope-intercept form and in standard form an equation that passes through (-1, 2) with slope 4
SOVA2 [1]

Answer:

\textsf{Point-slope form}: \quad \sf y-2=4(x+1)

\textsf{Slope-intercept form}: \quad \sf y=4x+6

\textsf{Standard form}: \quad \sf 4x-y=-6

Step-by-step explanation:

<u>Given information</u>:

  • Slope = 4
  • Point on line = (-1, 2)

<u>Point-slope form</u><u> of linear equation</u>:  

\sf y-y_1=m(x-x_1)

(where m is the slope and (x₁, y₁) is a point on the line)

Substitute the given slope and point into the formula:

\implies \sf y-2=4(x-(-1))

\implies \sf y-2=4(x+1)

<u>Slope-intercept form</u><u> of a linear equation</u>:

\sf y=mx+b

(where m is the slope and b is the y-intercept)

Substitute the given slope and point into the formula and solve for b:

\implies \sf 2=4(-1)+b

\implies \sf b=6

Therefore:

\sf y=4x+6

<u>Standard form</u><u> of a linear equation</u>:

\sf Ax+By=C

(where A, B and C are constants and A must be positive)

Rearrange the found slope-intercept form of the equation into standard form:

\implies \sf y=4x+6

\implies \sf 4x-y+6=0

\implies \sf 4x-y=-6

Learn more about linear equations here:

brainly.com/question/27317293

brainly.com/question/28062655

8 0
2 years ago
Read 2 more answers
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