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Fynjy0 [20]
2 years ago
12

If 5 bags weigh the same as 3 blocks, how many blocks will 9 bags weigh?

Mathematics
2 answers:
crimeas [40]2 years ago
8 0

Answer: C. 5.4 Blocks

Step-by-step explanation:

<u>Given information</u>

5 bags = 3 blocks

<u>Set variable</u>

Let x be the number of blocks

<u>Constructure proportional equation</u>

\frac{3}{5} } ~=~\frac{x}{9}

<u>Cross multiply the fraction</u>

(3)~*~(9)~=~(5)~*~(x)

27~=~5x

<u>Divide 5 on both sides</u>

27~/~5~=~5x~/~5

\Large\boxed{x=5.4~blocks}

Hope this helps!! :)

Please let me know if you have any questions

alexandr402 [8]2 years ago
3 0

Answer:

oc

Step-by-step explanation:

5 times .6 equals 3

9 times .6 equals 5.4

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A train moving at a speed of 75 km/hr covers a certain distance in 4.8 hours.
kakasveta [241]

Answer:

Step-by-step explanation:

Distance=Speed×Time

75×4.8=360

Speed=distance÷time

360÷3=120km/h

6 0
3 years ago
Good afternoon, please help me with this question and if u get it correct ill give u the brainlest
Luden [163]

Answer:

3/5

Step-by-step explanation:

Hope that this helped :)

3 0
2 years ago
A bag contains 31 checkers—13 red and 18 black. Determine whether the events "a red checker is selected, not replaced and then a
Ipatiy [6.2K]

Answer:

dependent, 39/155

Step-by-step explanation:

Since the checkers are not replaced, the events are dependent since the number of checkers in the bag  when you pick the second time depends on the first pick.

31 checkers—13 red and 18 black.

P(red) = red/ total

          = 13/31

Keep the checker

Then 30 checkers—12 red and 18 black.

P(black) = black/ total

          = 18/30 = 3/5

P ( red, keep,black) = 13/31 *3/5

                                   39/155

8 0
3 years ago
Find the exact value of cos(7\pi /12)
Naya [18.7K]

7π/12 lies in the second quadrant, so we expect cos(7π/12) to be negative.

Recall that

\cos^2x=\dfrac{1+\cos(2x)}2

which tells us

\cos\left(\dfrac{7\pi}{12}\right)=-\sqrt{\dfrac{1+\cos\left(\frac{7\pi}6\right)}2}

Now,

\cos\left(\dfrac{7\pi}6\right)=-\cos\left(\dfrac\pi6\right)=-\dfrac{\sqrt3}2

and so

\cos\left(\dfrac{7\pi}{12}\right)=-\sqrt{\dfrac{1-\frac{\sqrt3}2}2}=\boxed{-\dfrac{\sqrt{2-\sqrt3}}2}

7 0
3 years ago
Can someone help me real quick
murzikaleks [220]

Hello!

  • Equation: y = 2.50x + 4
  • 7 rides.

We can write an expression to show this scenario. Write this in the equation format y = mx + b:

m = rate of change, or cost per ride

b = initial cost, or cost to enter the fair

y = 2.50x + 4

Solve for the amount of rides possible with $21.50:

21.50 = 2.50x + 4

Subtract 4 from both sides to isolate x:

17.50 = 2.50x

Divide both sides by 2.50:

17.50/2.50 = 7 rides.

7 0
2 years ago
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