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RideAnS [48]
3 years ago
10

Bob the builder is making 480 kg concrete mix. Concrete is made by mixing cement, sand and gravel in the ratio 1:3:4 how much sa

nd does he need
Mathematics
2 answers:
Igoryamba3 years ago
4 0

Answer:

Bob the builder need 180 kg sand.

Step-by-step explanation:

The amount of concrete mixture is 480 kg. It is given that concrete is made by mixing cement, sand and gravel in the ratio 1:3:4.

Let the amount of cement, sand and gravel in concrete mixture be x, 3x, 4x respectively.

x+3x+4x=480

8x=480

Divide both sides by 8.

x=60

The amount of sand is 3x, so

3\times 60=180

Therefore bob the builder need 180 kg sand.

Lemur [1.5K]3 years ago
3 0

1x+3x+4x = 480

8x = 480

xdivide by 8

x=60

cement: 1x = 60kg

sand : 3x = 3*60 = 180kg

gravel : 4x = 4*60 = 240kg

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Tema [17]

Answer:

We have the problem:

"Clare is in charge of getting snacks for a road trip with her friends and her dog. She has

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In this situation we have two variables:

X =  number of snacks for herself and her friends that she buys. Each one of these costs $3.50

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The total cost, in this case, can be written as:

X*$3.50 + Y*$9

And we know that she has $35 to spend, so she can spend $35 or less in the store, then we have the inequality:

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4 0
3 years ago
What is the GCF of 48x4 and 44x5
zepelin [54]
The GCF would be : 4x^4
8 0
3 years ago
A boat leaves the dock and travels 9 miles due south, then 12 miles due west.
loris [4]
The answer would be A. 15mi
4 0
3 years ago
The midpoint of the line segment from P1 to P2 is (-6,5). If P1 = (-7,8), what is P2?
kipiarov [429]
You can determine midpoint by
x-midpoint = (x₁ + x₂)/2
y-midpoint = (y₁ + y₂)/2

Given from the question
x-midpoint = -6
x₁ = -7
y-midpoint = 5
y₁ = 8

Asked from the question
(x₂, y₂)

Solution
Find x₂, input the value of x₁ and x-midpoint to the formula
(x₁ + x₂)/2 = x-midpoint
(-7 + x₂)/2 = -6
-7 + x₂ = -6 × 2
-7 + x₂ = -12
x₂ = -12 + 7
x₂ = -5

Find y₂, input the value of y₁ and y-midpoint to the formula
(y₁ + y₂)/2 = 5
(8 + y₂)/2 = 5
8 + y₂ = 5 × 2
8 + y₂ = 10
y₂ = 10 - 8
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Answer
P₂ = (-5,2)
5 0
3 years ago
How to write −8 2/11 in standard form?
rewona [7]

Answer:

- 90/11

Step-by-step explanation:

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