1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Ainat [17]
3 years ago
6

Divide 30cm into the ratio 2:4

Mathematics
2 answers:
timofeeve [1]3 years ago
8 0
First you add the two parts of the ratio.
2 + 4 = 6

then you divide

30 / 6 = 5

then you multiply into the original ratio

(2 x 5) : (4 x 5)

10 : 20
Verizon [17]3 years ago
7 0
Hey there, 30:15, 2:4 simplified is 1:2, 15*2=30 and 1*30=30,
You might be interested in
7. Use the quadratic formula to find the solution(s). x² + 2x - 8 = 0​
morpeh [17]

Hey there!

<u>Use the quadratic formula to find the solution(s). x² + 2x - 8 = 0</u>

  • Answer :

x = -4 or x = 2 ✅

  • Explanation :

<em><u>Quadratic</u></em><em><u> </u></em><em><u>formula </u></em><em><u>:</u></em><em><u> </u></em>ax² + bx + c = 0 where a ≠ 0

The number of real-number solutions <em>(roots)</em> is determined by the discriminant (b² - 4ac) :

  • If b² - 4ac > 0 , There are 2 real-number solutions

  • If b² - 4ac = 0 , There is 1 real-number solution.

  • If b² - 4ac < 0 , There is no real-number solution.

The <em><u>roots</u></em> of the equation are determined by the following calculation:

x =  \frac{ - b \pm  \sqrt{ {b}^{2} - 4ac } }{2a}

Here, we have :

  • a = 1
  • b = 2
  • c = -8

1) <u>Calculate </u><u>the </u><u>discrim</u><u>i</u><u>n</u><u>ant</u><u> </u><u>:</u>

b² - 4ac ⇔ 2² - 4(1)(-8) ⇔ 4 - (-32) ⇔ 36

b² - 4ac = 36 > 0 ; The equation admits two real-number solutions

2) <u>Calculate </u><u>the </u><u>roots </u><u>of </u><u>the </u><u>equation</u><u>:</u>

▪️ (1)

x_1 =  \frac{ - b -  \sqrt{ {b}^{2}  - 4ac} }{2a}  \\  \\ x_1 =  \frac{ - 2 -  \sqrt{36} }{2(1) }  \\  \\ x_1 =  \frac{ - 2 - 6}{2}   \\ \\ x_1 =  \frac{ - 8}{2}  \\  \\ \blue{\boxed{\red{x_1 = -4}}}

▪️ (2)

x_2 =  \frac{ - b  +   \sqrt{ {b}^{2} - 4ac } }{2a}  \\  \\ x_2 =  \frac{ - 2 +  \sqrt{36} }{2(1)}  \\  \\ x_2 =  \frac{ - 2 + 6}{2}  \\  \\ x_2 =  \frac{4}{2}  \\  \\ \red{\boxed{\blue{x_2 = 2}}}

>> Therefore, your answers are x = -4 or x = 2.

Learn more about <u>quadratic equations</u>:

brainly.com/question/27638369

6 0
2 years ago
Read 2 more answers
It's been a while since I've taken a math class and I'm stressed please help me out. The question is circled.
brilliants [131]
-3/2x

The rational expression would not be defined only when the denominator is divided by 0

That is:

2x =0

x = 0/2

x =0

Hence it would not be defined when x = 0.

Hope this helps.
8 0
3 years ago
Read 2 more answers
8 +2/3 (6x + 30) = 80
amid [387]

Answer:

X=13

Step-by-step explanation:

Isolate the variable by dividing each side by factors that don't contain the variable.

5 0
2 years ago
The radius of a circle measures 15 feet. what is the circumference?
harina [27]
The circumference of this circle is c=94.25ft
7 0
3 years ago
There are 568 kiloliters of soup in a pot. How many liters of liquid did the chef use for this recipe?
Georgia [21]

Answer:

568,000L

Step-by-step explanation:

1 Kiloliter = 1,000 Liters

568 x 1,000 = 568,000

3 0
3 years ago
Other questions:
  • I made a square frame for my favorite bird picture from four wooden pieces. Each piece is a rectangle with a perimeter of 24 inc
    14·1 answer
  • How to find 0.36 repeating in a equivalent fraction form?
    6·1 answer
  • A. Find x. The figure is not drawn to scale.
    12·1 answer
  • Leo works at the Bagel Shop after school and on Saturdays. He is paid $4 per hour after school and $5 per hour on Saturday. Last
    9·1 answer
  • Someone, please help me
    6·1 answer
  • Solve the simultaneous equations. <br>xy = 4<br>x + y = 5​
    13·2 answers
  • HELPP THIS ISNT MINE THIS MY SISAND I DONT LIKE LATH SOHELP PLEASE BECAUSE IT DUE NOW ASP!!!!
    5·2 answers
  • For the function {(2, 4), (3, 5), (4, 6), (5, 7)}, what is the domain?
    11·1 answer
  • Help me please i will give appreciate it
    7·1 answer
  • A small regional carrier accepted 23 reservations for a particular flight with 19 seats. 18 reservations went to regular custome
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!