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Answer:

She should aim 6 feet down the wall

Explanation:

The diagram attached sketches the situtation.

Since the angle with which the ball hits the wall is the same with which it bounces, angle β is the same for the two shown triangles.

Then, since both are right triangles, then all the angles are congruent and the triangles are similar. Hence, you can equal the ratios of the sides, to make an equation:

x/4 = y/2 ⇒ x = 2y

You have other equation:

x+ y = 18

Substitute

2y + y = 18

3y = 18

y = 18/3

y = 6 ← this is the distance down the wall where the ball should hit

x = 2(6) = 12

Then, she should aim 6 feet down the wall.

Answer:

ABCDEFGHIJKLMNOPQRSTUV*W*

Step-by-step explanation:

*W*ala kang jowa

Answer:

x = 7.5

Step-by-step explanation:

Given that the triangles are similar then the ratios of corresponding sides are equal, that is

[tex]\frac{9}{x}[/tex] = [tex]\frac{6}{5}[/tex] ( cross- multiply )

6x = 45 ( divide both sides by 6 )

x = 7.5

Answer:

x²+3x+2

Step-by-step explanation:

According to Vieta's formula x²-(sum of roots)x((product of roots)=0

Therefore x²-(-3)x+2=0

=x²+3x+2

Answer:

x={-5,-6}

Step-by-step explanation:

x²+11x+30=0

x²+5x+6x+30=0 (as 5*6=30 and 5+6=11)

x(x+5)+6(x+5)=0

(x+5)(x+6)=0

so

x+5=0

x+6=0

therefore

x=-5

x=-6

Answer:

x = - 6, x = - 5

Step-by-step explanation:

Given

x² + 11x + 30 = 0

Consider the factors of the constant term (+ 30) which sum to give the coefficient of the x- term (+ 11)

The factors are + 6 and + 5 , since

6 × 5 = 30 and 6 + 5 = 11, then

x² + 11x + 30 = 0

(x + 6)(x + 5) = 0 ← in factored form

Equate each factor to zero and solve for x

x + 6 = 0 ⇒ x = - 6

x + 5 = 0 ⇒ x = - 5

Answer:

37.5 percent (3/8)

Step-by-step explanation:

Answer

The cheaper dog sitter is Derrick's.

Step-by-step explanation:

You did not really ask a question here but i am assuming that your asking who is the cheaper route.

Answer:

a=b/4

Step-by-step explanation:

subtract 4b from both sides to end up with a=b-3a and then add 3a to both sides to get 4a=b, and divide both sides by 4 to get a=b/4.

Answer:

a + 4b + 5b - 3a can only be solved by a little.

Step-by-step explanation:

a + 3a =3a.

4b + 5b = 9b.

we can't solve 9b - 3a, since they have different functions, so 9b - 3a is the answer.

Answer:

Step-by-step explanation:

Just multiply what the equation equalds by the divosor

Answer:

1. 2587.3

2. 25873

3.25873000

4. 258730000

Step-by-step explanation:

Step-by-step explanation:

by deleting

9y = -9

y = -1

6x - 4 = -10

6x = -6 then x = -1

Answer:

a quantity representing the power to which a given number or expression is to be raised, usually expressed as a raised symbol beside the number or expression (e.g. 3 in 23 = 2 × 2 × 2).

Step-by-step explanation:

Answer:

(4,-4)

Step-by-step explanation:

Just plot it or like I did it like this

Since moving right or left is X axis, just add 5 to -1 becuase its ont he X axis

Then for the bottom and up, thats Y so subtract  that to the Y axis so 2-6=-4

4,-4

Answer:

The first bullet

Step-by-step explanation:

it has heads with the colors & also the same for tails

Step-by-step explanation:

what is that X, and X²???

Answer:

x= -2

Step-by-step explanation:

7x+26+5x=2

7x+5x=12x

12x=2-26

12x= -24

(divide both sides by 12)

x= -2

Answer:

[tex]7x + 26 + 5x = 2 \\ 12x = 2 - 26 \\ 12x = - 24 \\ x = - 2[/tex]

plzz mark as brainliest

Answer:

32.25 minutes

Step-by-step explanation:

2 feet: 1 second

4230 feet: 2115 seconds

2115 as a minute is 32.25 minutes

please mark me as brainliest!!!<3

Answer:

70%

Step-by-step explanation:

Given data

Last years worth of vanishing potion= $82

This years worth of vanishing portion= $118

Note: Another way of asking this question is "what percent of $82 is $118"

So

=82/118*100

=0.69*100

=69%

=70% approx

Hence last years sale is 70% of this year's sales

Answer:

x = 2[tex]\sqrt{2}[/tex]

Step-by-step explanation:

Using Pythagoras' identity in the right triangle.

The square on the hypotenuse is equal to the sum of the squares on the other 2 sides, that is

x² + (2[tex]\sqrt{2}[/tex] )² = 4²

x² + 8 = 16 ( subtract 8 from both sides )

x² = 8 ( take the square root of both sides )

x = [tex]\sqrt{8}[/tex] = 2[tex]\sqrt{2}[/tex]

Answer:

We conclude that the gradient of the line is: 2/3

Step-by-step explanation:

It is clear that the given graph represents a line or linear function.

From the graph, taking two points

Finding the gradient or slope of the line

Using the formula

Gradient = m =  [y₂ - y₁] /  [x₂ - x₁]

                      =  [-2 - 0] / [0 - 3]

                      = -2 / -3

                       = 2/3

Thus, the slope of the line = m = 2/3

Therefore, we conclude that the gradient of the line is: 2/3

Answer:

sin x = 39/89       cos x = 80/89     tan x = 89/80

Step-by-step explanation:

SOA  CAH  TOA

sin = opp/adj

cos = adj/hyp

tan = opp/adj

Answer:

i dont know

Step-by-step explanation:

sorry but pleasr still work hard!

Answer:

Graph the line using the slope and y-intercept, or 2 points.

Slope: 3

y-intercept: (0,-3)

Answer:

x = 60

Step-by-step explanation:

Since the 3 sides of the triangle are congruent, then the triangle is equilateral with interior angles congruent and equal to 60°

x and the angle on the right of the triangle are alternate and congruent, so

x = 60

Answer:

Here's  9th grade answer from one high-schooler to another

Step-by-step explanation:

The answers 9 i believe since you have to isolate the variables and subtract them  

Answer:

12544/20=627.2

Step-by-step explanation:

I might be wrong Sorry If I am

Answer:

3

Step-by-step explanation:

Answer:

3/10

Step-by-step explanation:

.

Answer: it is linear

Step-by-step explanation: A linear equation is an equation of a straight line, which means that the degree of a linear equation must be 0 or 1   for each of its variables. In this case, the degree of variable  y is 1 and the degree of variable x is 1