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
Alex Ar [27]
3 years ago
15

Please help me with this math question​

Mathematics
1 answer:
Nostrana [21]3 years ago
4 0

Total=110=D+J+K

D=(2/3)J

K=2J

...a...

If J=x,

D=(2/3)x ⟨— i

K=2x ⟨— ii

...b...

T=D+J+K

110=(2/3)x+x+2x ⟨— b

...c...

110=2x/3+3x/3+6x/3

110=11x/3

330=11x

330/11=x

30=x

D=(2/3)x

D=(2/3)(30)

D=20

Dennis received 20 marbles ⟨— c

You might be interested in
What value of B makes the expression. x² + Bx + 81 a perfect square trinomial?
Oxana [17]

Answer:

B.) 18

Step-by-step explanation:

To find the correct b value we use this formula

b² - 4ac = 0

b = What we are solving for

a = 1

c = 81

b² - 4(1)(81) = 0

b² - 324 = 0

b² = 324

b = \sqrt{324}

b = ±18

And 18 is one of the answer choices

So B.) 18 is the correct answer.

4 0
3 years ago
Read 2 more answers
The sum of 2x+7 and −x+12 is equal to 14 what is x?
Alekssandra [29.7K]

Answer:-5


Step-by-step explanation:

2x+7-x+12=14

x+19=14

x=-5

                 


4 0
3 years ago
A particle moves along the curve below. y = √ 3 + x 3 y=3+x3 As it reaches the point ( 1 , 2 ) (1,2), the y y-coordinate is incr
nydimaria [60]

Answer:

The x-coordinate of the point changing at ¼cm/s

Step-by-step explanation:

Given

y = √(3 + x³)

Point (1,2)

Increment Rate = dy/dt = 3cm/s

To calculate how fast is the x-coordinate of the point changing at that instant?

First, we calculate dy/dx

if y = √(3 + x³)

dy/dx = 3x²/(2√(3 + x³))

At (x,y) = (1,2)

dy/dx = 3(1)²/(2√(3 + 1³))

dy/dx = 3/2√4

dy/dx = 3/(2*2)

dy/dx = ¾

Then we calculate dx/dt

dx/dt = dy/dt ÷ dy/dx

Where dy/dx = ¾ and dy/dt = 3

dx/dt = ¾ ÷ 3

dx/dt = ¾ * ⅓

dx/dt = ¼cm/s

The x-coordinate of the point changing at ¼cm/s

7 0
3 years ago
ANSWER !! <br> ILL GIVE 40 POINTS !!<br> DONT SKIP :(( <br> PLUS BRAINLIEST !
Likurg_2 [28]

Answer:

85

Step-by-step explanation:

10x13=130, 9x5=45, 130-45=85

4 0
2 years ago
What is 73+48.7 show how you got the answer​
kotykmax [81]

Answer:

121.7

Step-by-step explanation:

73

+48.7

=121.7

121.7

-73

=48.7

6 0
3 years ago
Other questions:
  • State the opposite -5x
    12·1 answer
  • What are some examples if irratinal numbers
    15·2 answers
  • Please help with number 1
    6·1 answer
  • Help please its due in 10 minutes
    7·1 answer
  • suppose the population of a certian city is 3784 thousand it is expected to decrease to 3001 thousand in 50 years find the perce
    7·1 answer
  • When Matthew eats a pizza he always eats a whole slice at a time with no bites left over. Which graph best represents this situa
    9·2 answers
  • A bag contains 6 red marables and 12 blue ones you select one marable at random from the bag what is the probability that you se
    7·2 answers
  • CANNOT!!! be simplified​
    15·1 answer
  • Given f(x) = x3 - x2 + 4x - 1 and<br> g(x) = -2x, find lim g(f(x))<br> X-2
    15·1 answer
  • I NEED THIS ASAP WHOEVER GETS FIRST GET BRAINLIEST
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!