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LUCKY_DIMON [66]
3 years ago
8

Jake makes concrete by mixing cemente, sand and gravel in the ratio 4:2:1 work out the mass of the sand in 38.5kg of concrete mi

x
Mathematics
2 answers:
Dmitry_Shevchenko [17]3 years ago
8 0
You divide 38.5 by 7 then times your answer by 2
The answer is 1.4285kg
liubo4ka [24]3 years ago
6 0

Answer:

11kg

Step-by-step explanation:

In order to answer this question you need to find out how much cement, sand and gravel is needed to make 38.5g of concrete mix. To do this you must find out how many parts the concrete mix ratio is made up (4 + 2 + 1 = 7) Then divide the total concrete mix (38.5kg) by the number of parts; 38.5/7 = 5.5. This tells you that each of the 7 parts of the ratio = 5.5kg. As the ratio tells you sand is 2 parts you multiply this by 5.5 (2 x 5.5kg = 11kg).

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vfiekz [6]

Answer:reflect across

Step-by-step explanation:

4 0
3 years ago
Please help with this it’s 11 points
Evgesh-ka [11]

Answer:

Line means going on upto point but line segment means limited line

8 0
3 years ago
Read 2 more answers
Hamburger sells 3 pounds for six dollars if Samantha 510 pounds of hamburger how much will she pay
Lina20 [59]
I believe you meant to say that if Samantha bought 510 pounds of hamburger, how much will she pay?
 
Now from the information we already have, we know that 3 pounds of hamburger will cost 6 dollars. 

The next thing we need to know is how much one pound of hamburger will cost. This will help us calculate  how much the rest will cost.

we now form an equation to assist us.
3 = 6
1= x

(where x represents the unknown price of one pound of hamburger)

Now we must cross-multiply:

3 * x = 6 x 1

3x = 6 

x = 6/3

x = 2

therefore one pound of hamburger costs 2 dollars.

Now, If one pound costs 2 dollars, how about 510 pounds?

We simply multiply:  510 x 2 = 1,020

Therefore  Samantha will pay 1, 020 dollars for 510 pounds of hamburger.






5 0
3 years ago
A fisherman positions his net to -8 relative to the surface of the water. how far does he need to raise the net to bring it to t
8_murik_8 [283]

Answer: If i am correct the answer should be 9-10 because if it is -8 it takes 8 to bring it to 0 and it takes 9 to bring it to 1 and it takes 10 to bring it to 2.

Hope this helps!

6 0
3 years ago
Reduce to simplest form. -3/5 + (-8/2) =
Dominik [7]

Answer:

<u>The answer is -4 3/5</u>

Step-by-step explanation:

Let's reduce to its simplest form:

-3/5 + (-8/2) =

Step 1: Lowest Common Denominator (10):

- 6/10 + (-40/10) =

Step 2: Solve the parentheses:

- 6/10 - 40/10 =

Step 3: Subtract the fractions:

-46/10

Step 4: Simplify (Dividing by 2):

-23/5

Step 5: Converting the fraction to mixed number:

-4 3/5

<u>The answer is -4 3/5</u>

3 0
3 years ago
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