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2 years ago

HELPP ME PLZ IM VERY CONFUSED

1 answer:

6 0

1st answer none of the above. these are the same angle and have sin of -1

#66 true -360° is the same as+360° and sin here is 0

67. true

68 neither. cos is -1 at 180 and -180

69 false, tan is undefined there

70 undefined

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What is the diameter of a circle whose area is 532 sq ft?

alekssr [168]

the answer would be:

D=2r

7 0

2 years ago

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If H is in the interior of ∠EFG, m∠EFH = 75°, and m∠HFG = (10x)°, and m∠EFG = (20x − 5)°, then x = ? and m∠HFG = ?

Diano4ka-milaya [45]

Answer:

$x=8$

$\m\angle HFG= 80^\circ$

Step-by-step explanation:

Given that:

Point $H$ is interior of $\angle EFG$ .

$m\angle EFH = 75^\circ\\m\angle HFG = (10x)^\circ\\m\angle EFG = (20x-5)^\circ$

To find:

$x = ?\\m\angle HFG = ?$

Solution:

First of all, let us represent the given values in the form of a diagram.

Kindly refer to the attached image for the given points and values of angles.

We can clearly see that:

$m\angle EFG = m\angle EFH + m\angle HFG$

Putting all the values given in above equation, we get:

$(20x-5)^\circ = 75^\circ + 10x^\circ\\\Rightarrow 20x-10x=75+5\\\Rightarrow 10x =80\\\Rightarrow \bold{x =8}$

$m\angle HFG =10x^\circ\\\Rightarrow m\angle HFG =10\times 8^\circ\\\Rightarrow m\angle HFG = \bold{80^\circ}$

8 0

3 years ago

What is the ratio fraction form of 25:9

kipiarov [429]

Answer:

25/9

Step-by-step explanation:

Fraction is 25/9 and it's simplified.

Hope my answer has helped you if not i'm sorry.

6 0

2 years ago

PLEASE HELP

enyata [817]

Answer:

There are 24 ways to select one book of each type.

Step-by-step explanation:

In mathematics, the procedure to select k items from n distinct items, without replacement, is known as combinations.

The formula to compute the combinations of k items from n is given by the formula:

${n\choose k}=\frac{n!}{k!(n-k)!}$

It is provided that there are 6 different biographies and 4 different mystery novels on a bookshelf.

Compute the number of ways to select a biography as follows:

Number of ways to select a biography =

$={6\choose 1}\\\\=\frac{6!}{1!(6-1)!}\\\\=\frac{6\times 5!}{1\times 5!}\\\\=6$

There are 6 ways to select a biography.

Compute the number of ways to select a mystery novel as follows:

Number of ways to select a mystery novel =

$={4\choose 1}\\\\=\frac{4!}{1!(4-1)!}\\\\=\frac{4\times 3!}{1\times 3!}\\\\=4$

There are 4 ways to select a mystery novel.

Then the total number of way to select one book of each type is:

${6\choose 1}\times {4\choose 1}=6\times 4=24$

Thus, there are 24 ways to select one book of each type.

6 0

3 years ago

Rotate trapezoid ABCD 90° clockwise around the origin. What are the coordinates of D’?

wolverine [178]

When you rotate it clockwise
lets say you have thepoint (a,b)
when you rotate it clockwise you are left with the points (-b,-a)

so

D=(-4,0)
therefor
negative and switch
new point is
(0,4)

answe is C

3 0

2 years ago