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3 years ago

D = -0.51 + 7 what is this i need this fast btw baha

Mathematics

2 answers:

Roman55 [17]3 years ago

4 0

Answer:

6.49

Step-by-step explanation:

MrRissso [65]3 years ago

3 0

Answer:

6.49

Step-by-step explanation:

Take 7 subtracted by 0.51 since 0.51 in the equation is a negative number.

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Do the table and graph represent the same function?

valentina_108 [34]

No because the numbers in the graph don’t match the values in the table

8 0

2 years ago

If Logan(3)=5, what is the value of a^5?

Archy [21]

Answer:

$a^5=3$

Step-by-step explanation:

When it comes to exponential expressions and logarithms, the following relationship applies:

$\log_b{(x)}=a\ \leftrightarrow\ b^a=x$

Here, it means ...

$\boxed{a^5=3}$

8 0

2 years ago

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You have 480 grams of a radioactive kind of samarium. If its half-life is 90 years,

lisov135 [29]

Answer:

120 grams will be left after 180 years.

Step-by-step explanation:

A radioactive half-life refers to the amount of time it takes for half of the original isotope to decay and its given by

$N(t)=N_0(\frac{1}{2})^\frac{t}{t_{1/2}}$

where,

$N(t)$ = quantity of the substance remaining

$N_0$ = initial quantity of the substance

$t$ = time elapsed

$t_{1/2}$ = half life of the substance

From the information given we know that:

The initial quantity is 480 g,
The half-life is 90 years,
180 years is the time elapsed.

And we want to find how much will be left. For this we use the above formula.

$N(t)=480\left(\frac{1}{2}\right)^{\frac{180}{90}}\\\\N(t)=480\left(\frac{1}{2}\right)^2\\\\N(t)=480\cdot \frac{1}{2^2}=120$

120 grams will be left after 180 years.

3 0

3 years ago

The Eiffel Tower is 324 m tall. If a tourist is looking at it from 100 m away from the base,

romanna [79]

Answer:

80,94º

Step-by-step explanation:

What I've done is, first draw a triangle with a 90º angle and write down the height (324m) and the tourist's distance (100m).

So I calculated the tangent of the angle of the tourist.

The formula is tan=Oposite side/adjacent

$tan=\frac{opposite side}{adjacent}$

$tan=\frac{324}{100} =3.24$

And now with your calculator you press "shift" and "tan". Then introduce 3,24 and it will give you the result (80,94º).

I hope it helped.

4 0

2 years ago

What is 2x-3y=-1 <br> y=x-1

Vika [28.1K]

If you're looking for the solution to the system of equations, here's how we solve using substitution
We know that y = x - 1, so we can plug that into the first equation giving
2x - 3(x-1) = -1
Now distribute the 3 giving 2x - 3x + 3 = -1. After combining like terms we get -x + 3 = -1. Now subtract 3 from both sides, -x = -4, and multiply both sides by -1 to make x positive. x = 4
Now we can plug that into the second equation to get y
y = x - 1, and we know that x = 4, so y = 4 - 1, y = 3. The solution is (4, 3)

8 0

2 years ago

Read 2 more answers