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3 years ago

A. write an equation that relates a and b when a = 4 when b = 24

Mathematics

1 answer:

tatiyna3 years ago

3 0

Answer:

a + b = 28

b = 31

Step-by-step explanation:

i hope it's correct but I am not sure tho :)

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Hi, teacher I was absent these days and I didn’t understand anything about this lesson and I need help this is not count as a te

motikmotik

Given:

There are given that the cos function:

$cos210^{\circ}=-\frac{\sqrt{3}}{2}$

Explanation:

To find the value, first, we need to use the half-angle formula:

So,

From the half-angle formula:

$cos(\frac{\theta}{2})=\pm\sqrt{\frac{1+cos\theta}{2}}$

Then,

Since 105 degrees is the 2nd quadrant so cosine is negative

Then,

By the formula:

$\begin{gathered} cos(105^{\circ})=cos(\frac{210^{\circ}}{2}) \\ =-\sqrt{\frac{1+cos(210)}{2}} \end{gathered}$

Then,

Put the value of cos210 degrees into the above function:

So,

$\begin{gathered} cos(105^{\circ})=-\sqrt{\frac{1+cos(210)}{2}} \\ cos(105^{\operatorname{\circ}})=-\sqrt{\frac{1-\frac{\sqrt{3}}{2}}{2}} \\ cos(105^{\circ})=-\sqrt{\frac{2-\sqrt{3}}{4}} \\ cos(105^{\circ})=-\frac{\sqrt{2-\sqrt{3}}}{2} \end{gathered}$

Final answer:

Hence, the value of the cos(105) is shown below:

$cos(105^{\operatorname{\circ}})=-\frac{\sqrt{2-\sqrt{3}}}{2}$

4 0

1 year ago

What is the equation of the line that passes through the point(−7,−1) and has a slope of 1?

bonufazy [111]

Answer:

y=x+6

Step-by-step explanation:

Put (-7,-1) into

y-y1=m(x-x1) form, and m=1 (the slope)

y+1=1(x+7)

y+1=x+7

y=x+6

Happy Holidays!

4 0

2 years ago

7 1/2 - 6 3/10 find the differnce

tigry1 [53]

Answer: they are different numbers

Step-by-step explanation:

7 0

2 years ago

Please choose the answer that describes the scientific notation for 5,098,000.. A. 5.098 × 75777. B. 5.098 × 108. C. 5.098 × 107

Sidana [21]

Standard form:
5,098,000

Scientific notation.
1) only 1 digit should be before the decimal point.
5.098000

2) only non-zero number must be part of the coefficient. the rest are included in the base of 10.

5.098 x 10^6 Choice D.

Exponent is the number of times the decimal moved from its original placement to its place after the 1st digit.

5 0

2 years ago

Read 2 more answers

In a class of 29 students, there are

Nikitich [7]

Answer:

Number of students in 6th grade = 29

Number of boys = 15

Number of girls = 29-15 = 14

Ratio of boys to girls = 15 : 14

Step-by-step explanation:

smchmack me with dat brainliest