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3 years ago

Can someone help me... What is the answer

Mathematics

1 answer:

serious [3.7K]3 years ago

8 0

z = 2y

Step-by-step explanation:

$x = 2y$ ..... (given)

$z = x$ ... (exterior alternate angles)

$z = 2y$

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A car can travel 20 miles on a gallon of gas.Write and solve an inequality to show at least how many gallons of gas are need to

Hoochie [10]

20x≥100
x≥5

5 gallons needed to travel 100 miles

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3 years ago

What is an equation of the line that passes through the points (-6, -5) and (-6, -2)?

Fittoniya [83]

Answer:

x=-6

Step-by-step explanation:

The x coordinates are the same, so we know that we have a vertical line.

Vertical lines have no slope, so they are in the form

Since the x coordinate is -6

x=-6

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3 years ago

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A sample of a radioactive isotope had an initial mass of 360 mg in the year 1998 and

RUDIKE [14]

Answer:

193 mg

Step-by-step explanation:

Exponential decay formula:

$A_t = A_0e^r^t$
where Aₜ = mass at time t, A₀ = mass at time 0, r = decay constant (rate), t = time

Our known variables are:

1998 to the year 2004 is a total of t = 6 years.
The sample of radioactive isotope has an initial mass of A₀ = 360 mg at time 0 and a mass of Aₜ = 270 mg at time t.

Let's solve for the decay constant of this sample.

$270=360e^-^r^(^6^)$
$270=360e^-^6^r$
$\frac{3}{4} =e^-^6^r$
$\text{ln} (\frac{3}{4} )= \text{ln}(e^-^6^r)$
$\text{ln} (\frac{3}{4} )=-6r$
$r=-\frac{\text{ln}\frac{3}{4} }{6}$
$r=0.04794701$

Using our new variables, we can now solve for Aₜ at t = 7 years, since we go from 2004 to 2011.

Our new initial mass is A₀ = 270 mg. We solved for the decay constant, r = 0.04794701.

$A_t=270e^-^(^0^.^0^4^7^9^4^8^0^1^)^(^7^)$
$A_t=270e^-^0^.^3^3^5^6^2^9^0^7$
$A_t=193.01982213$

The expected mass of the sample in the year 2011 would be 193 mg.

3 0

3 years ago

1/2+2/3+1/6 equals what

Anastasy [175]

Answer:

4/11

Step-by-step explanation:

Add them together

6 0

4 years ago

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Giving Brainly! It’s not 50 x 0.15... thank you :)

kvasek [131]

Answer:

Step-by-step explanation:

You made the same mistake as you did the last time

if you have 50 stocks paying you .15 4 times a year that means you get

50*.15*4= 30

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3 years ago

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