Which expression is equivalent -4×4×4×4×4×4×4×4?
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Answer:
The guy below is correct!
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Answers
B.2
C.3
D.6
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By using a quadratic equation the missing denominator of the solution is 4 plus or minus the square root of 2, all over is (B).2
What is a Quadratic Equation?
For a Quadratic Equation
By Formula Method we get
So we have a Quadratic Equation that is
On Comparing we get,
a = 2
b = -8
c = 7
By substituting a, b, and c values we get
Therefore, by using a quadratic equation the missing denominator of the solution 4 plus or minus the square root of 2, all over is (B).2
Hence the correct answer is option B.2
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Answer:
C. 3
Step-by-step explanation:
3x² + 4x - 2 = 0
[-4 +- sqrt(4² - 4(3)(-2))]/(2×3)
[-4 +- sqrt(40)]/6
[-4 +- 2sqrt(10)]/6
Simplifying, we get:
[-2 +- sqrt(10)]/3
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The four multiples of 2/6 are 4/12, 6/18, 8/24 and 10/30
What is fraction?
A fraction is a part of a whole. In arithmetic, the number is expressed as a quotient, in which the numerator is divided by the denominator.
What is a multiple?
A multiple of a whole number is the product of the number and any countingnumber.
e.g. 3, 6 , 9 , 12 , 15 , 18 and so on are the multiples of 3.
given number: 2/6
now, we have to find the multiples for the fraction 2/6.
So,
2/6* 2/2
= 4/12
2/6* 3/3
=6/18
2/6*4/4
=8/24
2/6* 5/5
=10/30
All the four multiples can again reducible to fraction 2/6.
Hence, the four multiples are : 4/12, 6/18, 8/24 and 10/30
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How much water does Andrew save each day with the change in shower heads if he uses the shower for 8 minutes each day?
5 gallons
16 gallons
24 gallons
40 gallons
Answers
gallons water Andrew save each day with the change in shower heads if he uses the shower for 8 minutes each day
What is equation?
In mathematics, an equation is a formula that expresses the equality of two expressions, by connecting them with the equals sign =.
According to questions, standard showerhead in Andrew's house dispenses 8 gallons of water per minute. Andrew changed this shower head to an energy-saving one.
The equation shows the amount of water dispensed, y, as a function of the number of minutes, x, for the new shower head.
Following, this pattern, the equation for the previous shower head is
Amount of water dispensed previously
×
Amount of water dispensed after change in shower
×
Total water Andrew save each day with the change in shower
gallons
Hence, we can conclude that gallons water Andrew save each day with the change in shower heads if he uses the shower for 8 minutes each day.
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y=3x.
3 is the slope here, and it means that the new shower head dispenses 3 gallons per minute.
Following, this pattern, the equation for the previous shower head is y=8x.
From this point, there are two ways to solve this:
Way 1: Input x, which in this case is 8 minutes, into each equation, and then find the difference with subtraction.
y=3x
y=3*8
y=24
So the new shower head dispenses 24 gallons in eight minutes.
y=8x
y=8*8
y=64
Therefore, you can conclude that the old shower head dispensed 64 gallons in eight minutes.
To figure out how much he saves, subtract the values:
64-24= 40 gallons.
Way 2) Find the difference before substitution:
y=8x-3x
y=5x
Substitute for x.
y=5*8
y=40 gallons
Therefore, the answer is D. 40 gallons. I hope this helped :)