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trapecia [35]
3 years ago
13

Equation of the line that passes through (2, -1) and has a slope of -5

Mathematics
1 answer:
slega [8]3 years ago
8 0
The equation : y = -5x + 9
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A giraffe can run up to 46.93 ft. per second. How far could a giraffe run in 1.8 seconds? Justify your answer
frozen [14]
84.474 because 46.93(1.8) = 84.474
3 0
3 years ago
Make d the subject of the formula h= d/3 + 2
Leni [432]

Answer:

d= 3h-6

Step-by-step explanation:

h= d/3+2

h-2= d/3

d= 3(h-2)= 3h-6

5 0
3 years ago
Read 2 more answers
PLZ HELP, AND PLZ EXPLAIN
shutvik [7]

Answer:

C

Step-by-step explanation:

To make it easy let's start by organizing our information :

  • AC=12 AND BD=8
  • ABCD is a rhombus
  • K and L are the midpoints of sides AD and CD
  • we notice that the rhombus ABCD is divided into four right triangles

What do you think of when you hear a right triangle ?

  • The pythagorian theorem !

AC and BD  are khown so let's focus on them .

If we concentrated we can notice that AB and BD are cossing each other in the midpoints . why ?

Simply because they are the diagonals of a rhombus .

ow let's apply the pythagorian theorem :

  • (AC/2)² + (BD/2)² = BC²
  • 6²+4²=52
  • BC²= 52⇒\sqrt{52}=BC

Now we khow that : AB=BC=CD=AD=\sqrt{52}

This isn't enough . Let's try to figure out a way to calculate the length of KL  wich is the base of the triangle

  • KL is parallel to AC
  • k is the midpoint of AD and L of DC

I smell something . yes! Thales theorem

  • KL/AC=DL/DC=DK/AD WE4LL TAKE OLY ONE
  • KL/12=\sqrt{52}/2*\sqrt{52}  
  • KL/12=1/2⇒ KL=6

Now we have the length of the base kl

Now the big boss the height :

  • notice that you khow the length of KL
  • BD crosses kl from its midpoint and DL = \sqrt{52} /2

What I want to do is to apply the pythgorian thaorem to khow the lenght of that small part that is not a part of the height of the triangle . I will call it D

  • DL²=(KL/2)²+D²
  • 52/4= 9+ D²
  • D² = 52/4-9 +4 SO D=2

now the height of the trigle is H= BD-D= 8-2=6

NOw the area of the triangle is :

  • A=(KL*H)/2 ⇒ A= (6*6)/2=18

THE ANSWER IS 18 SQ.UN

5 0
3 years ago
Check wether the given value is the solution to the equation<br><br> 3(y+8)=2y-6 y=30
erma4kov [3.2K]
30+8*3=114 2y-6=56.... I think your answer would be 170 but I'm not completely sure
4 0
3 years ago
3(4x^2y^3 + 2x^3) – 4(9x^3y^2 – 6x^2y^3)<br> How to solve pls?
babunello [35]

Answer:

3(4 {x}^{2}  {y}^{3} + 2 {x}^{3}) - 4(9 {x}^{3}  {y}^{2}  - 6 {x}^{2}  {y}^{3} ) \\  = (12 {x}^{2}  {y}^{3}  + 6 {x}^{3} ) - (36{x}^{3}  {y}^{2} - 24{x}^{2}  {y}^{3}) \\  = (12 {x}^{2}  {y}^{3}  + 6 {x}^{3} )  +  ( - 36{x}^{3}  {y}^{2}  +  24{x}^{2}  {y}^{3}) \\  = - 36{x}^{3}  {y}^{2}  + 36x^{2}  {y}^{3} + 6 {x}^{3}

I hope I helped you^_^

4 0
3 years ago
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