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3 years ago

I neeeedddd help with this question

Mathematics

2 answers:

Schach [20]3 years ago

7 0

Answer:

Step-by-step explanation:

wolverine [178]3 years ago

5 0

Answer:

itz B :)

Step-by-step explanation:

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sdas [7]

The angles of a triangle all add up to 180º.

You need to set up and solve the equation:

84+48+3h = 180

6 0

3 years ago

What is the y-intercept of the equation of the line that is perpendicular to the line y =

Luda [366]

Answer:

$y$ intercept $=10$

line $y=-x+10$

Step-by-step explanation:

Let $y=mx+b$ is the required line.

Slope of perpendicular lines : If $m_{1}$ and $m_{2}$ be slope of two perpendicular lines. Them $m_{1}\times m_{2}=-1$

$y=mx+b$ is perpendicular to $y=x+10$

the slope of $y=x+10$ is $=1$

$m\times 1=-1\\m=-1$

Hence eqn is $y=-x+b$

This equation passes through $(15,-5)$

$-5=-15+b\\b=-5+15\\b=10$

so the line is $y=-x+10$

y-intercept :

Substitute $x=10$

$y=0+10\\y=10$

7 0

3 years ago

A student stands 20 m away from the foot

Ostrovityanka [42]

Answer:

Height of tree is $\approx$ 15 m.

Step-by-step explanation:

Given that student is 20 m away from the foot of tree.

and table is 1.5 m above the ground.

The angle of elevation is: 34°28'

Please refer to the attached image. The given situation can be mapped to a right angled triangle as shown in the image.

AB = CP = 20 m

CA = PB = 1.5 m

$\angle C$ = 34°28' = 34.46°

To find TB = ?

we can use trigonometric function tangent to find TP in right angled $\triangle TPC$

$tan \theta = \dfrac{Perpendicular}{Base}\\tan C= \dfrac{PT}{PC}\\\Rightarrow tan 34.46^\circ = \dfrac{PT}{20}\\\Rightarrow PT = 20 \times 0.686 \\\Rightarrow PT = 13.72\ m$

Now, adding PB to TP will give us the height of tree, TB

Now, height of tree TB = TP + PB

TB = 13.72 + 1.5 = 15.22 $\approx$ 15 m

7 0

3 years ago

Someone please help me, i’ll mark brainliest answer !

igomit [66]

Answer:

I say that the answer is A, B, and C. I'm not positive but I think that is the answer.

Step-by-step explanation:

Tell me if I'm wrong it might just be B and C.

6 0

3 years ago

PLEASE HELP Type in expanded form. Use parentheses to indicate multiplication. (2r)³

charle [14.2K]

It would be 8 $r^{3}$ because you have to multiply the exponent by each of the numbers exponents. you may not see it but 2 has a 1 as an exponent and so does r. 1 time 3 is 3 for each therefore each number now has an exponent of 3 and we got rid of the outside exponent. now all you have to do is simplify the 2 to the power of 3 which gives you 8 and that is all

5 0

3 years ago

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