Answer:
The amount of sand builders need is 180 kg.
Step-by-step explanation:
It is given that the Bob the builder is making 480 kg on concrete mix. Concrete is made by mixing cement, sand and gravel in the ratio 1 : 3 : 4.
Let the amount of cement, sand and gravel is x, 3x and 4x respectively.
Since Bob the builder is making 480 kg on concrete mix, therefore
Divide both sides by 8.
The value of x is 60.
The amount of sand is 3x.
Therefore the amount of sand builders need is 180 kg.
Yes i need help with this question
Answer:
1st one is "square root of 2x"
2nd one is "2 square root of x"
3rd one is "is not"
Step-by-step explanation:
1st one: you have 2x for g(x) then you plug that into the x for f(x) giving you square root of 2x
2nd one: you have square root of x for f(x) then you plug that into the x for g(x) giving you 2 square root of x
3rd one: the inverse of the square root of x is x^2
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Answer:
2x² +5x -12 = 0
Step-by-step explanation:
When p and q are roots of a quadratic, its factored form can be written as ...
(x -p)(x -q) = 0
Here, the roots are given as -4 and 3/2, so the factored form would be ...
(x -(-4))(x -(3/2) = 0
Multiplying by 2 gives us ...
(x +4)(2x -3) = 0
Expanding the product, we find the desired quadratic is ...
2x² +5x -12 = 0
Answer:
4y^(2)+14y+31
Step-by-step explanation:
First you need to do (y+7)(y+7)
y^2+7y+7y+49
y^2+14y+49
Add it all together
y^2+14y+49+3y^2-15
4y^(2)+14y+31