Mathematics High School

What is this equation called and how do I do it?

Answers

Answer 1

Answer:

DE ≈ 40

Step-by-step explanation:

Using the Sine rule in Δ DEF

∠ D = 180° - (58 + 87)° ← sum of angles in a triangle

∠ D = 180° - 145° = 35° , then

[tex]\frac{DE}{sin87}[/tex] = [tex]\frac{EF}{sin35}[/tex] = [tex]\frac{23}{sin35}[/tex] ( cross- multiply )

DE × sin35° = 23 × sin87° ( divide both sides by sin35° )

DE = [tex]\frac{23sin87}{sin35}[/tex] ≈ 40 units ( to the nearest whole number )

Related Questions

Calculate the distance between the points N=(-9,9) and H=(-3,2) in the coordinate plane.

Answers

Answer:

[tex]\sqrt{85}[/tex] units

Step-by-step explanation:

Calculate the distance d using the distance formula

d = [tex]\sqrt{(x_{2}-x_{1})^2+(y_{2}-y_{1})^2 }[/tex]

with (x₁, y₁ ) = N(- 9, 9) and (x₂, y₂ ) = H(- 3, 2)

d = [tex]\sqrt{-3+9)^2+(2-9)^2}[/tex]

= [tex]\sqrt{6^2+(-7)^2}[/tex]

= [tex]\sqrt{36+49}[/tex]

= [tex]\sqrt{85}[/tex]

Sasha can mow 3/8 of an acre of grass in 45 minutes. How many acres of grass does Sasha mow per hour.

Answers

Answer:

1/2 an acre of grass per hour. (4/8 works too)

Step-by-step explanation:

We can divide 45 by 3 to get the time it takes to do one acre, we get 15 for this. Then we multiply 15 by 4.

Solve this question. 70 pts

Answers

Answer:

Step-by-step explanation:

Because you add them and you get what will equal 54.

Answer: 100 cm^2

Step-by-step explanation:

the sqaure at the bottom left is 4x4=16

the rectangle next to it is 6x10=60

the triangle is .5(6x8)=24

16+60+24=100

Francesca bought a rectangular piece of fabric that is 2/3 yard long and 3/4 yard wide. What is the area, in square yards, of the piece of fabric?

Answers

Answer:

[tex]area \: = length \times width \\ = \frac{2}{3} \times \frac{3}{4} \\ = \frac{(2 \times 3)}{(3 \times 4)} \\ = \frac{6}{12} \\ area = \frac{1}{2} square \: yards[/tex]

What is the solution to the system of equations graphed below ASAP

Answers

Answer:

(-5,1)

Step-by-step explanation:

They intersect

someone help please! i’ll give brainliest

Answers

Answer:

what r the option and its regular 2

Answer:

y-axis

Explanation:

Quadrant I: ( + , + )

Quadrat II: ( - , + )

Quadrant III: ( - , - )

Quadrant IV: ( + , - )

x-axis = ( +/- , 0 )

y-axis = ( 0 , +/- )

Edit: You mentioned that x and y axis are options too therefore, the answer was changed.

3(1 - 2x) > 3 - 6x
answer

Answers

Answer:

It’s is also 6 and 9

Step-by-step explanation:

It’s 6 and 9 cause you divide

Bars of soap come in packages of 6 and packages of 20. The 6-bar pack costs $7.86, and the 20-bar pack costs $25.00. Which is the better deal? What is the price per bar of the better deal?

Answers

Answer:

mayn im just gettin points

Step-by-step explanation:

sorry other people :) :(

Solve the equation below for x.
cx- 4 = 7

A. x=11/c
B. x=c/3
C. x=3/c
D. x= c/11

Answers

Answer:

a. x = 11/c

Step-by-step explanation:

cx - 4 = 7 [add 4 to both sides of the equation]

cx = 11 [divide by c to isolate x]

x = 11/c

A player can move from point to point only in a direction that includes a downward motion (slanted or not). In how many distinct ways can a player move from the top to bottom?

Answers

Answer: 11

The answer is 11 because I counted the ways very carefully and even highlighted each path I took

Answer:

Step-by-step explanation:

pleasee help me ASAP ITS DUE SOON

I just need to know

1. slope
2. y-intercept
3. slope intercept form

Answers

(-5, 2) ⇒ x₁ = -5, y₁ = 2

(7, -1) ⇒ x₂ = 7, y₂ = -1

Slope:

[tex]\bold{m=\dfrac{y_2-y_1}{x_2-x_1}=\dfrac{-1-2}{7+5}=\dfrac{-3}{12}=-\dfrac14}[/tex]

Slope intercept form:

y = mx + b

Plug m and (7, -1) :

-1 = -¹/₄(7) + b

-1 + ⁷/₄ = b

b = ³/₄ ← y-intercept

Therefore slope intercept form of h(x):

h(x) = -¹/₄x + ³/₄

Brooke has set up 70 chairs in equal rows for the class talent show. But,there is not room for more than 20 rows. What are the possible number of rooms that Brooke could set up?

Mathematics

Answers

Answer: If the rows must be even, she can set

14 rows of 5 chairs

10 rows of 7 chairs

7 rows of 10 chairs or

5 rows of 14 chairs

Step-by-step explanation:

Take the prime factors of 70: 2, 5 and 7 Multiply them in different ways to get the combinations where no product is greater than 20. (7 ×5 is the one combination of factors that won't work)

Can someone pleaseeee help if you’re correct I’ll give u brainlist

Answers

Answer:

180 - 48 = 132

132 ÷ 2= 66

p = 66°

Answer:

Step-by-step explanation:

The person above me is right thank you person above me

Candice is playing an online trivia game. She has 75 points and earns 3 points for each correct answer. She will advance to the next round if her score is over 90 points which statement best describes how antibiotics are used?
75x + 3 > 90
3x + 90 90
3x + 75 < 90

Answers

Answer:

3x+75>90

Step-by-step explanation:

P.S Can I have brainliest?

Answer:

3x + 75 < 90

Step-by-step explanation:

Can i be brainlist i work very hard

Lily likes to collect records. Last year she had 15 records in her collection. Now she has 24 records.
What is the percent increase of her collection?
The percent increase of her collection is %.

Answers

Answer:

The percent increase of her collection is 60%

Step-by-step explanation:

Divide 24 by 15 to get your answer which is 1.6. Since the decimal is .6 and it is one digit behind the decimal, you can safely assume it is 60%

Answer:

the answer is 60

Step-by-step explanation:

answer plz..... ill mark brainleist

Answers

Answer:

ok this is a lot easy

Step-by-step explanation:

D mabye

Tammy figured her math exam would be difficult unless she put in at
least 15 hours of study time to prepare. She studied 2½ hours on
Monday, 3 hours on Tuesday, 4¾ hours on Wednesday, and 4 ½
hours on Thursday. Did she study for at least 15 hours? Explain.

Answers

Answer: No, she did not study for at least 15 hours.

=======================================================

Explanation:

Fractions are often a pain, so I find it easier to convert to decimal form whenever possible.

1/2 = 0.5

3/4 = 0.75

which lead to,

2 & 1/2 = 2 + 1/2 = 2 + 0.5 = 2.5

4 & 3/4 = 4 + 3/4 = 4 + 0.75 = 4.75

4 & 1/2 = 4 + 1/2 = 4 + 0.5 = 4.5

-----------------------------

We can then rephrase the problem like so:

"She studied 2.5 hours on Monday, 3 hours on Tuesday, 4.75 hours on Wednesday, and 4.5 hours on Thursday"

Add up those decimal values to get:

2.5 + 3 + 4.75 + 4.5 = 14.75

In total, Tammy studied for 14.75 hours, which is equivalent to 14 & 3/4 hours.

This result is smaller than 15, so she did not study for at least 15 hours.

Note: "at least 15" is the same as saying "15 or more".

What is the solution to the following equation? x2 + 3x + 4 = 0

Answers

Answer:

[tex]x=\dfrac{-3\pm \sqrt7i}{2}[/tex]

Step-by-step explanation:

The given equation is [tex]x^{2}+3x+4=0[/tex].

We need to find the solution of the above equation.

The solution of an equation [tex]ax^2+bx+c=0[/tex] is :

[tex]x=\dfrac{-b\pm \sqrt{b^2-4ac} }{2a}[/tex]

We have, a = 1, b = 3 and c = 4

[tex]x=\dfrac{-3+ \sqrt{(3)^2-4(1)(4)} }{2}, \dfrac{-3- \sqrt{(3)^2-4(1)(4)} }{2}\\\\=\dfrac{-3+\sqrt{9-16}}{2}, \dfrac{-3-\sqrt{9-16}}{2}\\\\=\dfrac{-3\pm \sqrt7i}{2}[/tex]

So, the solution of the given equation is [tex]\dfrac{-3\pm \sqrt7i}{2}[/tex].

Answer my last question

Answers

Answer:

I answer your last question just now, yep right now this momment

Step-by-step explanation:

In the figure, XU=−4y+ 20 and XW=6y+ 10. Find the radius of the inscribed circle of △RST.
Can Anyone Help Please and Thank you!:)

Answers

Answer:

Step-by-step explanation:

Write the equation as a sine function.

Answers

This sin graph doesn't have a phase shift and its vertical displacement (d) is zero, so you don't need to include it in the equation of y = asin[b(x-c)]+d.

Determine the largest integer value of xx in the solution of the following inequality.
2x−8≤-19

Answers

Answer:

x≤-11/2

Step-by-step explanation:

Hope this helps!

Brain-List?

what should be multiplied by the expression in the image to obtain the smallest square

Answers

Answer:

2xy

Step-by-step explanation:

Here, we want to obtain the number with the smallest square

To get this, we simply find the nearest number square which is 2

The nearest x squared which is x (to get x^4)

The nearest y squared which is y (to get y^2)

Thus, the smallest number so we get a square will be; 2xy

A chemist is using 353 milliliters of a solution of acid and water. If 14.7 of the solution is acid, how many milliliters of acid are there? Round your answer to the nearest tenth

Answers

Answer:

The amount of Acid in a solution = 51.9 millimeters

Step-by-step explanation:

Given that the total amount of solution of acid and water = 353 milliliters

Acid percentage = 14.7%

Thus, in order to determine the amount of acid, all we need is to multiply 353 with 14.7% or 0.147.

i.e

Amount of Acid = 14.7% of 353

= 0.147 × 353

= 51.9 millimeters

Therefore, the amount of Acid in a solution = 51.9 millimeters

Based on the evidence shown, which statement correctly compares the twins' rates of growth?

Answers

Answer:

A- Margaret gre at a faster rate than Donavan

Step-by-step explanation:

How do I find the slope parallel to the equation. y = 3x - 4?

Answers

Answer:

Use the slope-intercept form to find the slope. The slope-intercept form is y=mx+b y = m x + b , where m m is the slope and b b is the y-intercept. Using the slope-intercept form, the slope is 3 3 . All lines that are parallel to y=3x+4 y = 3 x + 4 have the same slope of 3 .

I think this's your answer...!!

can someone please help me with this question?

Answers

They’re congruent through the AAS (Angle-Angle-Side) Theorem

Answer:

I believe that the answer would be B, the AAS theorem

Step-by-step explanation:

If I remember correctly, the angles and sides are listed in the order they occur. This would make the correct theorem AAS (Angle-Angle-Side)

am i correct ?? just wanted to make sure i think not oop

Answers

Answer:

I do not believe you are !

Step-by-step explanation:

6/a - 4/b = 1 and 9/a - 8/b = 1

Answers

Answer:

a = 3 ; b = 4

Step-by-step explanation:

Eqn.1 = [tex] \frac{6}{a} - \frac{4}{b} = 1[/tex]

Eqn.2 = [tex] \frac{9}{a} - \frac{8}{b} = 1[/tex]

Both the eqns have RHS (Right Hand Side) equal. So,

[tex] \frac{6}{a} - \frac{4}{b} = \frac{9}{a} - \frac{8}{b} [/tex]

[tex] = > \frac{6b - 4a}{ab} = \frac{9b - 8a}{ab} [/tex]

Cancelling ab from both the denominators of both the sides,

[tex] = > 6b - 4a = 9b - 8a[/tex]

[tex] = > 8a - 4a = 9b - 6b[/tex]

[tex] = > 4a = 3b[/tex]

[tex] = > a = \frac{3b}{4} [/tex]

Putting the value of a in Eqn.1,

[tex] \frac{6}{ \frac{3b}{4} } - \frac{4}{b} = 1[/tex]

[tex] = > \frac{24}{3b} - \frac{4}{b} = 1[/tex]

[tex] = > \frac{8}{b} - \frac{4}{b} = 1[/tex]

[tex] = > \frac{8 - 4}{b} = 1[/tex]

[tex] = > b = 4[/tex]

Putting the value of b in the value of a

[tex]a = \frac{3 \times 4}{4} = 3[/tex]

WHAT ARE THE COORDINATES OF POINT Q? (-4,2 1/2)

Answers

Answer:

you wrote the answer

Step-by-step explanation:

Answer:

(-4,2 1/2)

Step-by-step explanation:

Answer:

(-4,2 1/2)