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2 years ago

Jessica paid $ 42.90 for 15 gallons of gas. What was the price per gallon of gas Jessica paid?

Mathematics

1 answer:

Alisiya [41]2 years ago

7 0

Answer:

2.86

Step-by-step explanation:

Just do 42.90 divided by 15 to get the answer, which equals 2.86.

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Find center,foci and vertices of ellipse for 4x2+y2+2x-10y=6

grandymaker [24]

Answer:

center:

(-0.25, 5)

foci :

(-0.25, 0.158771) | (-0.25, 9.84123)

vertices :

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wolframramalpha

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11 months ago

1.Arsenic-74 is used to locate brain tumors. It has a half-life of 17.5 days. 90 mg wereused in a procedure. Write an equation t

Sophie [7]

$1)\text{ }N_t\text{ = 90\lparen}\frac{1}{2})^{\frac{t}{17.5}}$

2) 5.625 mg will be left

Explanation:

1) Half-life = 17.5 days

initial amount of Arsenic-74 = 90 mg

To get the equation, we will use the equation of half-life:

$\begin{gathered} N_t\text{ = N}_0(\frac{1}{2})^{\frac{t}{t_{\frac{1}{2}}}} \\ where\text{ N}_t\text{ = amount remaining} \\ N_0\text{ = initial amount} \\ t_{\frac{1}{2}\text{ }}\text{ = half-life} \end{gathered}$ $N_t\text{ = 90\lparen}\frac{1}{2})^{\frac{t}{17.5}}$

2) we need to find the remaining amount of Arsenic-74 after 70 days

t = 70

$\begin{gathered} N_t=\text{ 90\lparen}\frac{1}{2})^{\frac{70}{17.5}} \\ N_t\text{ = 5.625 mg} \end{gathered}$

So after 70 days, 5.625 mg will be left

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11 months ago

Find the simplest form

Elis [28]

Answer:

x = 8

y = 16

Step-by-step explanation:

8 + 8 = 16

y = 16

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2 years ago

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Step-by-step explanation:

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2 years ago

If the points (0,0), (-1, 1), and (-2,2) lie on the graph of function h, then which of the following rules could represent the

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Explanation:

h(0) = |0| = 0

h(-1) = |-1| = 1

h(-2) = |-2| = 2

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2 years ago