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
victus00 [196]
3 years ago
11

Use mental math to find a solution for 2/8= 3/x+2

Mathematics
1 answer:
asambeis [7]3 years ago
8 0

Answer:

2/3 + 3/5 = 19

15

= 14

15

≅ 1.266667

Step-by-step explanation:

Add: 2

3

+ 3

5

= 2 · 5

3 · 5

+ 3 · 3

5 · 3

= 10

15

+ 9

15

= 10 + 9

15

= 19

15


You might be interested in
407.10 euros to pounds ​
Svetradugi [14.3K]

Answer:

361.27 Pound sterling

Step-by-step explanation:

3 0
3 years ago
(8x-12) (3x+5)=360<br> Can y’all please help me solve this problem. It is a polygon theorem
Lorico [155]

Answer:

360 polygon

Step-by-step explanation:

follow me and mark this answer

5 0
2 years ago
A true-false quiz with 10 questions was given to a statistics class. Following is the probability distribution for the score of
disa [49]

Answer:

E(X)=\sum_{i=1}^n X_i P(X_i)  

And if we use the values obtained we got:  

E(X)=5*0.05 +6*0.15 +7*0.33 +8*0.28+ 9*0.12 +10*0.07=7.48  

For this case this value means that the expected score is about 7.48

Step-by-step explanation:

For this case we assume the following probability distribution:

X         5       6         7       8        9        10

P(X)   0.05   0.15  0.33  0.28   0.12   0.07

First we need to find the expected value (first moment) and the second moment in order to find the variance and then the standard deviation.

In order to calculate the expected value we can use the following formula:  

E(X)=\sum_{i=1}^n X_i P(X_i)  

And if we use the values obtained we got:  

E(X)=5*0.05 +6*0.15 +7*0.33 +8*0.28+ 9*0.12 +10*0.07=7.48  

For this case this value means that the expected score is about 7.48

In order to find the standard deviation we need to find first the second moment, given by :  

E(X^2)=\sum_{i=1}^n X^2_i P(X_i)  

And using the formula we got:  

E(X^2)=(5^2 *0.05)+(6^2 *0.15)+(7^2 *0.33)+(8^2 *0.28)+ (9^2 *0.12 +(10^2 *0.07))=57.46  

Then we can find the variance with the following formula:  

Var(X)=E(X^2)-[E(X)]^2 =57.46-(7.48)^2 =1.5096  

And then the standard deviation would be given by:  

Sd(X)=\sqrt{Var(X)}=\sqrt{1.5096}=1.229  

5 0
3 years ago
Read 2 more answers
Ashley purchased a prepaid phone card for $ 25 . Long distance calls cost 17 cents a minute using this card. Ashley used her car
Lynna [10]
124.5 minutes = 2 hours and 7 minutes and 5 seconds
7 0
3 years ago
Read 2 more answers
A rectangle has an area of 40 square units. The length is 6<br> units greater than the width.
stiks02 [169]

Answer:

Answer:

The width is 4 units, and the length is 10 units.

Step-by-step.

Step-by-step explanation:

area of rectangle = length * width

Let L = length; let W = width.

"The length is 6 units greater than the width.": L = W + 6

area = LW = 40

Since L = W + 6, we substitute L with W + 6.

(W + 6)W = 40

W^2 + 6W = 40

W^2 + 6W - 40 = 0

(W - 4)(W + 10) = 0

W - 4 = 0 or W + 10 = 0

W = 4 or W = -10

A width cannot be a negative number, so we discard the solution W = -10.

W = 4

L = W + 6 = 4 + 6 = 10

The width is 4 units, and the length is 10 units.

3 0
3 years ago
Read 2 more answers
Other questions:
  • Help me with #22 please.
    7·2 answers
  • If m and n are positive two-digit numbers, then, of the following fractions, the one with the largest value is:
    6·2 answers
  • Each batch of cookies requires 1 3/5 cups of butter. If Amanda has 8 cups of butter, how many batches of cookies can she bake
    6·1 answer
  • A parallelogram has consecutive vertices A (-2,0), P (0,-2) and C (2,4). Find the fourth vertex.
    9·2 answers
  • Determine the axis of symmetry for the function f(x) = −4(x + 7)2 − 3.
    7·1 answer
  • Rafael's art class is 6 hours long. How long is his class in minutes?
    9·2 answers
  • GIVING BRANLIEST!!!
    9·1 answer
  • What are they?<br> Equal Lines?<br> Parallel Lines?<br> perpendicular Lines?<br> None of the above?
    11·1 answer
  • How is ordering fractions on a number line similar to and different from ordering whole numbers on a number line?
    12·2 answers
  • What would it cost to lay a tile floor in a room measuring 12 m x 18 m if a tile costs $12 per m^2?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!