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2 years ago

The half-life of a radioactive kind of barium is 3 minutes. How much will be left after 6

Mathematics

1 answer:

Alexus [3.1K]2 years ago

7 0

Answer:

20 Grams will be left after 6 minutes.

Step-by-step explanation:

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I need answers for 1 , 2, 4

andreyandreev [35.5K]

Answer:

(3) x ≥ -3

(4) 2.5 gallons

(4) -12x + 36

Step-by-step explanation:

<em>Hey there!</em>

Well its a solid dot meaning it will be equal to.

So we can cross out 1 and 2.

And it's going to the right meaning x is greater than or equal to -3.

(3) x ≥ -3

Well if each milk container has 1 quart then there is 10 quarts.

And there is 4 quarts in a gallon, meaning there is 2.5 gallons of milk.

(4) 2.5 gallons

16 - 4(3x - 5)

16 - 12x + 20

-12x + 36

(4) -12x + 36

<em>Hope this helps :)</em>

3 0

2 years ago

A cashier earns $7 an hour. If x is the number of hours worked, which function represents the cashier’s earnings

iris [78.8K]

7x because its 7 times the number of hours worked can i have brainlyist

8 0

2 years ago

Find the estimates of x^2-x-2=3

Julli [10]

Answer:

$x=\frac{1+\sqrt{21}}{2}\approx 2.79\\or\ x=\frac{1-\sqrt{21}}{2}\approx -1.79$

Step-by-step explanation:

Given

Quadratic equation is

$x^2-x-2=3\\x^2-x-5=0$

Roots of the quadratic equation $ax^2+bx+c=0$ are

$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\$

So, for the given equation roots are

$x=\frac{1\pm\sqrt{(-1)^2-4(1)(-5)}}{2\cdot 1}\\x=\frac{1\pm\sqrt{21}}{2}\\so, x=\frac{1+\sqrt{21}}{2}\approx 2.79\\or\ x=\frac{1-\sqrt{21}}{2}\approx -1.79$

5 0

2 years ago

Find the slope and the y-intercept of the line.

baherus [9]

What i got was y=-3x-1

4 0

2 years ago

Choose the correct written expression for: (9 x 4)

torisob [31]

Answer:

9 times 4 divide by 6

Step-by-step explanation:

it might be it

3 0

2 years ago

Read 2 more answers