Mathematics High School

Find d.
Please explain if you know, thank you so much.

Answers

Answer 1

Answer: D is 8

Step-by-step explanation: nothing

Answer 2

Answer:

Step-by-step explanation:

the triangle is a 30º-60º-90º triangle, there's a formula for the sides of this type of triangle which I will attach

x = d

9 = x√3

9/√3 = x

x = 3√3

d = 3√3

Related Questions

Beth has $105 in her bank account. She buys x shirts for $5.75 each. Write and solve an equation Beth can use to find how many shirts she can buy with the money in her account.

Answers

Answer:

The equation for that would be 5.75x=105 and if you wanted the value for x it is 18.26(18 shirts)

Step-by-step explanation:

SInce she can't buy any decimal or fraction of a shirt then it would be 18 shirts.

what is the graph of y = x2 + 8x + 4?

Answers

answer here’s the graph

For the 1,000-meter running event, Abby's mean time is 4.5 minutes with a standard deviation of 0.75 minutes. For the 800-meter event, Abby's mean time is 3.2 minutes with a standard deviation of 0.4 minutes. In the last track meet, Abby ran the 1,000-meter race in 4.1 minutes and the 800-meter race in 3 minutes. In which event did Abby have a better performance?

Answers

Answer:

He performed better in the 800 m race

Step-by-step explanation:

Obtain the standardized score for each event :

Zscore = (score - mean) / standard deviation

1000 meter :

Mean = 4.5 ; Standard deviation = 0.75 ; x = 4.1

Zscore = (4.1 - 4.5) / 0.75

Zscore = - 0.4 / 0.75 = - 0.5333

800 meter :

Mean = 3.2 ; Standard deviation = 0.4 ; x = 3

Zscore = (3 - 3.2) / 0.4

Zscore = - 0.2 / 0.4 = - 0.5

-0.5 > - 0.533

Hence, he performed better in the 800 m race

Answer:

Abby had a better performance in the 800-meter because this z-score was closer to the mean than the z-score for the 1,000-meter.

Step-by-step explanation:

did it on egde

Will give Brainlies!!!
What is the y=mx+b of the equation 3x−2y=12

Answers

Answer:

y=3/2x-6

Step-by-step explanation:

To find the y=mx+b you need to move the y on one side while moving the others on the other side

First, move the 3x to the other side by subtracting by 3x on both sides:

-2y=-3x+12

Divide by -2 on both sides:

y=3/2x-6

Answer:

y=3/2x-6

Step-by-step explanation:

3x-2y=12

isolate the y:

-2y=-3x+12

get rid of the coefficient in front of y by dividing by -2

y=-3/-2x+12/-2

y=3/2x-6

55 videos to 77 videos

Answers

Answer:

The ratio is 55:77

Step-by-step explanation:

i need help i'm really stuck

Answers

Answer:

Step-by-step explanation:

If the area is 32 and the formula for area of a triangle is base * height / 2, and you have base = 8 and height = x and area = 32, this would be:

8 * x / 2 = 32

Now, solve:

[tex]8x/2=32\\4x=32\\x=8[/tex]

Answer:

x=8

Step-by-step explanation:

Area is equal to half of the base times the height. We are told that the area is 32and the base is 8, so we can write this equation:

32=1/2(8)h

Multiply 1/2 by 8:

32=4h

Divide both sides by 4:

h=8

So now we know that x (the height) equals 8.

HTH :)

Help? 11 3/4 is the quotient of a number y and 6 1/4

Answers

Answer:

y divided by 6 1/4 = 11 3/4

Step-by-step explanation:

First, change the mixed numbers into improper fractions:

y divided by 25/4 = 47/4

Next, multiply both sides by 25/4:

y divided by 25/4 x 25/4 = 47/4 x 25/4

The 25/4's on the left side of the equation cancel each other out, leaving you with:

y = 47/4 x 25/4

Multiply 47 x 25 and keep the same denominator:

y = 1,175/4

Divide and:

y = 293 3/4

find the slope of the line that goes through the given points

1. (0,7) (0,-8)
2. (-7,9) (-18,9)
3. (-5,9)(7,3)
4. (-7,8)(8,-3)

find the slope of the line from the given equation
1. y=-3x-4
2. y=2x+1
3. y= 3/2x
4. y= 5/9x+10
PLEASEEE HELP ILL MARK BRAINLIST

Answers

Answer:

1st=2. (-7,9) (-18,9)

2nd=4. y= 5/9x+10

1. (0,7) (0,-8)
points belong to a vertical line. There is no slope.

2. (-7,9) (-18,9)

points belong to a constant, linear function.
Slope= 0
3. (-5,9)(7,3)

m = -6 / 12 = -1 / 2 = Slope -0.5

4. (-7,8)(8,-3)

m = -11 / 15 = Slope -0.73333

(7,−8) and (x,-5) with a slope of -3/4
I have to find the value of X

Answers

Answer:

we have

slope=(-5--8)/(x-7)

-3/4=3/(x-7)

-3(x-7)=3×4

-3x+21=12

21-12=3x

3x=9

x=9/3=3

Answer:

x = 3

Step-by-step explanation:

slope = [tex]\frac{y_{2} - y_{1} }{x_{2} -x_{1} }[/tex]

Using the your two points the slope = m = [tex]\frac{-8 + 5}{7-x} = \frac{-3}{4}[/tex]

[tex]\frac{-3}{7-x} =\frac{-3}{4}[/tex]

Since the numerators are equal, then the denominators must be equal.

So, 7 - x = 4

-x = -3

x = 3

Nana bought 12 books for $28.50. What was the unit price?

Answers

Answer: 2.375 per book

Step-by-step explanation:

Answer:

2.375 per book

Step-by-step explanation:

divide 28.50 by 12 to get the unit rate which is 2.375 per book

(2x + 3) + (x + 1)
help

Answers

3x+4 combine like terms I think lol

The population of a town in Devon was 2000.
A few years later, the population went down to 1800.
Find the percentage decrease.

Answers

Answer:

10%

Step-by-step explanation:

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Write the equation of the
parabola that has x-intercepts of
(1,0) and (5,0) in standard form.

Answers

Answer:

y = x² - 6x +5

Step-by-step explanation:

(x -1)(x-5) = y

x² - 5x - x + 5 = y

x² - 6x +5 = y

One hundred forty-four of the 180 seventh-grade students attended the school dance last Saturday night. What percentage of seventh-grade students did NOT attend the dance?

Answers

Answer:

20%

Step-by-step explanation:

Because 144 OUT OF the 180 seventh grade students attended, this would represent 144/180.

But since we are trying to solve how many did NOT attend the dance, you must subtract 144 from 180 which equals 36. So 36/180 did not attend the dance.

But to make it a percentage, you divide 36/180. Fraction and percentage are like buddies! That's why it is very simple to make a fraction into a percentage.

a balances measure mass, while scales measure weight. So if you bring a balance and a scale to the moon, the balance will accurately give you the mass of, say, a moon rock, whereas the scale will be affected by the gravity. A balance determines mass by balancing an unknown mass against a known mass.

Step-by-step explanation:

its right believe me and mark brainliest plz

10-x=-2x what is it ???

Answers

Answer:

x = - 10

Step-by-step explanation:

Given

10 - x = - 2x ( add 2x to both sides )

10 + x = 0 ( subtract 10 from both sides )

x = - 10

The poster that lists the classroom rules in Mrs. Akin’s classroom has a length of 2/3 yard and a width of 3/4 yard.

Answers

It is C

3/4* 2/3= 6/12=1/2

I know it was kindda tricky but its a simpile question

PLZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ HELP NEED ANSWER NOW!!!!!!!!!!!!!!!!!
solve each linear system by GRAPHING. CHECK YOUR ANSWER
2.) x - y = 6
2x = 12 + 2y

3.)1/2 x - y = 4
2y = x + 6

Answers

Answer:

2.) Infinitely many solutions

3.) No solutions

Step-by-step explanation:

To solve systems of equations graphically, you need to find where they intersect

2.) First put each equation in the form y=mx+b

x-y=6 -> y= x-6

2x=12+2y -> y= x-6

Then, graph each line

Since we have the same equation, the lines are on top of each other so there are infinitely many solutions as they intersect everywhere.

To check, plug a point in from the graph into both equations and you should get 0=0

3.) First put each equation in the form y=mx+b

1/2x-y=4 -> y=1/2x-4

2y=x+6 -> y=1/2x+3

Then, graph each line

Since the lines have the same slope but a different y intercept, the lines are parallel. Therefore, there are no solutions as they do not intersect.

To check your answer, you would one equation as the y in the other equation.

2(1/2x-4)=x+6, then solve for x

Then plug that x into the original equations, and you'll see they are not equal. Hope that helps!

WILL MARK YOU BRAINLIEST

Answers

Answer:

the second : the angles are congruent and the side lengths are proportional

I think it’s answer D

what is the result of adding these two equations 8x-4y=-4 -3x+4y=5

Answers

Answer:

8x-4y=-4

-3x+4y=5

-----------------(adding equation)

5x=9

is a required answer

Help me please
Find the product. Simplify your answer.
2(-3a² + a)

Answers

answer: -6a square +2a

Step-by-step explanation:

2(-3a² + a)

=-6a square +2a

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Find d. Please explain if you know, thank you so much.

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Find d.
Please explain if you know, thank you so much.