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Veseljchak [2.6K]
3 years ago
7

Helppp me in my TEST Dont have to put the steps Please try Idk this

Mathematics
1 answer:
vitfil [10]3 years ago
5 0

Answer:

x = 11

z = 104

Step-by-step explanation:

opp angles are equal & sum of angles at apoint, will help next time.

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A DVD player costs a store $185 to purchase from the manufacturer. They mark the price of the DVD player up by 20% for profit. H
stellarik [79]

Answer:

$222

Step-by-step explanation:

$185 x 1.2 = $222

5 0
3 years ago
Read 2 more answers
Aiko stands 5 m from a tree. At that distance, the angle of elevation from the ground to the top of the tree is 80°.
denis23 [38]

Answer:

\boxed {\boxed {\sf About \ 28.36 \ meters }}

Step-by-step explanation:

Assuming the tree is perpendicular to the ground, we can use the right triangle trigonometric ratios to find the tree's height.

  • sin(θ)= opposite/hypotenuse
  • cos(θ)= adjacent/hypotenuse
  • tan(θ)= opposite/adjacent

Now, let's draw a diagram. We know Aiko is 5 meters from the base of the tree. From there, the angle to the top of the tree is 80 degrees. We are looking for x, the tree's height. The diagram attached is not to scale.

We base the sides off of the angle. x is opposite of 80 degrees and 5 is adjacent. Therefore we must use tangent.

tan(\Theta)=\frac{opposite}{adjacent}

  • opposite=x
  • adjacent=5 m
  • θ=80

Substitute in the known variables.

tan(80)=\frac{x}{5 \ m }

We want to find x, the height of the tree. Therefore we need to isolate that variable.

x is being divided and the inverse operation is multiplication. Multiply both sides of the equation by 5 meters.

5 \ m* tan(80)=\frac{x}{5 \ m }* 5 \ m

5 \ m* tan(80)=x

5 \ m *5.67128182=x

28.3564091 \ m = x

The question asks for an approximation, so let's round to the nearest hundredth.

The 6 in the thousandth place tells us to round the 5 to a 6.

28.36 \ m \approx x

The tree is about <u>28.36 meters tall.</u>

3 0
3 years ago
1. Joshua has a ladder that is 12 ft long. He will lean the ladder against a vertical wall. For safety reasons, he wants the ang
Mkey [24]
Let angle ladder makes with the ground be x degrees. 

sin x = 11.8/12
x = sin^-1(11.8/12)
x = 79.5 degrees (3 s.f.)

yes it is possible
3 0
3 years ago
What the degree of the polynomial and the y-intercept
Mumz [18]

Answer:

This is a fourth-degree polynomial

X-intercepts are - 5, -5, 3, and -3

The Y-intercept is 225

Step-by-step explanation:

Since it's already in the factored form you can find the zeros by separating each binomial and solving for x

x

2

−

25

=

0

x

2

=

25

x

=

±

5

x

2

−

9

=

0

x

2

=

9

x

=

±

3

so  

x

=

±

5

,

±

3

To find the y-intercept and the degree of the polynomial we need to convert the factored form into standard form

f

(

x

)

=

(

x

2

−

25

)

(

x

2

−

9

)

f

(

x

)

=

x

4

−

9

x

2

−

25

x

2

+

225

f

(

x

)

=

x

4

−

34

x

2

+

225

The degree of a polynomial is just the leading coefficients power which is 4 in this equation

In order to find the y-intercept we just need to allow  

x

=

0

because that is when any equation will cross the y-axis

f

(

x

)

=

0

4

−

34

(

0

)

2

+

225

f

(

x

)

=

225

4 0
3 years ago
Read 2 more answers
Find the number of paths from A to B. (Each step can only go up or to the right.)
mash [69]

Answer:

Total ways possible = 104 ways

Step-by-step explanation:

Total ways possible = 104 ways

The figure is attached here for understanding.

In the figure, the blank points are those points where we can not reach.

6 0
3 years ago
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