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3 years ago

Solve for x using the quadratic formula. 4x^2-3x+8=0

Mathematics

2 answers:

Paraphin [41]3 years ago

8 0

Answer:

answer : x = 3±√ 119 / 16

is correct answer ...plz mark my answer as brainlist ... plzzzz and plz vote me as brainlist

madam [21]3 years ago

6 0

Answer:

x= 1 /3 + −1 /3 √7

x= 1/ 3 + 1 /3 √7

Step-by-step explanation:

−12x2+8x+8=0

a=-12, b=8, c=8

−12x2+8x+8=0

x= −b±√b2−4ac /2a

x=−(8)±√(8)2−4(−12)(8) /2(−12)

x= −8±√448 −/24

x= 1/ 3 + 1 /3 √7 or x= 1 /3 + −1 /3 √7

(btw not sure)

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Element X is a radioactive isotope such that its mass decreases by 26% every day. If an experiment starts out with 810 grams of

ioda

Answer:

The hourly decay rate is of 1.25%, so the hourly rate of change is of -1.25%.

The function to represent the mass of the sample after t days is $A(t) = 810(0.74)^t$

Step-by-step explanation:

Exponential equation of decay:

The exponential equation for the amount of a substance is given by:

$A(t) = A(0)(1-r)^t$

In which A(0) is the initial amount and r is the decay rate, as a decimal.

Hourly rate of change:

Decreases 26% by day. A day has 24 hours. This means that $A(24) = (1-0.26)A(0) = 0.74A(0)$ ; We use this to find r.

$A(t) = A(0)(1-r)^t$

$0.74A(0) = A(0)(1-r)^{24}$

$(1-r)^{24} = 0.74$

$\sqrt[24]{(1-r)^{24}} = \sqrt[24]{0.74}$

$1 - r = (0.74)^{\frac{1}{24}}$

$1 - r = 0.9875$

$r = 1 - 0.9875 = 0.0125$

The hourly decay rate is of 1.25%, so the hourly rate of change is of -1.25%.

Starts out with 810 grams of Element X

This means that $A(0) = 810$

Element X is a radioactive isotope such that its mass decreases by 26% every day.

This means that we use, for this equation, r = 0.26.

The equation is:

$A(t) = A(0)(1-r)^t$

$A(t) = 810(1 - 0.26)^t$

$A(t) = 810(0.74)^t$

The function to represent the mass of the sample after t days is $A(t) = 810(0.74)^t$

5 0

3 years ago

The distance from Ari’s house, A, to Ben’s house, B, is equal to the distance from Ari’s house to Cal’s house, C. One day the bo

tresset_1 [31]

Answer:

they walked the same distance

Step-by-step explanation:

if you add cal's expression up which is 2(2+1)+(-4) you would have to use distributive property which means you would have to times 2 by 2 which is 4 and then times 2 by 1 and get two and then add them together and get 2 and if you do the same thing with Ari's expression you get 2.

3 0

3 years ago

|-24 + 12| lolololool

BaLLatris [955]

The answer to the equation is 12.

6 0

2 years ago

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The back of a dog house is composed of a square and a triangle . How much wood wood is needed for the back of the dog house to t

Anastaziya [24]

Answer:

Step-by-step explanation:

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Amanda is making pillows for her sofa, The fabric that she likes costs $45 per yard. Amanda waits until

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3 years ago