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3 years ago

Can someone help me answer all the questions?

Mathematics

1 answer:

melamori03 [73]3 years ago

8 0

Help you answer the questions, sure! Do the problems for you, nope.

in Problem 26 you have 2 small triangles. In the left one you have the angle 36 degrees, which means that the other acute angle is 90-36, or 54 (degrees). You'll need to find the height of the left triangle; finding that height is the same as determining the length of the side adjacent to the 36 degree angle.

Let that height be repr. by h.

Then tan 36 deg = h/21 Use the inverse tangent function to find the value of h.

Look at the triangle on the right. It has a 42 deg angle, and the length of the side next to it is h (which you found above). x is the hypotenuse.

Can you see that x*cos 42 deg = h? Knowing h, can you now find x?

If you have any qu. about this approach, please ask questions.

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Solve the simultaneous equations<br> 2x+3y=-3<br> 3x-2y=28

icang [17]

$\left \{ {\big{ 2x+3y=-3\ /\cdot2} \atop\big {3x-2y=28\ /\cdot3 }} \right.\\\\ \left \{ {\big{ 4x+6y=-6} \atop\big {9x-6y=84 }} \right.\\---------\\4x+9x=-6+84\\\\13x=78\ /:13\\\\x=6\\\\2x+3y=-3\ \ \ \ \Rightarrow\ \ \ 2\cdot6+3y=-3\ \ \ \Rightarrow\ \ \ 3y=-3-12\\\\3y=-15\ /:3\\\\c=-5\\\\Ans.\ \left \{ {{x=6} \atop {y=-5}} \right.$

4 0

4 years ago

What is the average rate of change for this function for the interval from x=3 to x=5

sveta [45]

Answer:

A. 16

Step-by-step explanation:

We have to find rate of change of function from x=3 to x=5

The average rate of change for the interval a≤x≤b is given by:

Rate of change= (f(b)-f(a))/(b-a)

In our question,

a=3

and

b=5

We can see from the table that at x = 3, the value of function is 18

So,

f(a)=18

and

At x=5, the value of function is 50

f(b)=50

Rate of change=(50-18)/(5-3)

=32/2

=16

So the rate of change of function between x=3 and x=5 is 16 ..

Option A is the correct answer..

3 0

3 years ago

Three hundred yards of fencing is being used to fence in a rectangular garden. The area of the garden is modeled by a quadratic

Fantom [35]

i uhm eeeeeeeeeeeeeeeeeeeeeeeeee

5 0

3 years ago

PLEASE HELP!! will give brainliest for the right answer.

Ludmilka [50]

Answer:

bro what's the question and there is no doc

Step-by-step explanation:

4 0

3 years ago

(-4,6); slope = -3/4

Ostrovityanka [42]

Answer:

y = - $\frac{3}{4}$ x + 3

Step-by-step explanation:

Assuming you require the equation of the line

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Here m = - $\frac{3}{4}$ , thus

y = - $\frac{3}{4}$ x + c ← is the partial equation

To find c substitute (- 4, 6) into the partial equation

6 = 3 + c ⇒ c = 6 - 3 = 3

y = - $\frac{3}{4}$ x + 3 ← equation of line

3 0

3 years ago