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2 years ago

Can someone help please

Mathematics

1 answer:

Viefleur [7K]2 years ago

8 0

9514 1404 393

Answer:

A, D

Step-by-step explanation:

The figure <em>looks</em> symmetrical, but their is no given information indicating it actually <em>is</em> symmetrical. Thus we can't make any statements about the segment lengths. Nor is there any indication that any of the arc lengths are identical.

If we rule out statements about segments and arcs, that only leaves statements about angles. As it happens both of those are true: inscribed angles that intercept the same arc are congruent.

The true statements are ...

A: ∠CAD≅∠CBD

D: ∠ACB≅∠ADB

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Ellie has 9 weeks to finish an 11 part project. How many parts does Ellie have to do each week?

netineya [11]

11 divided by 9 is 1.2 repeating so Ellie will have to do about 1.3 parts a week

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2 years ago

A substance with a half life is decaying exponentially. If there are initially 12grams of the substance and after 70 minutes the

dybincka [34]

Answer:

Step-by-step explanation:

Use the half life formula

$N=N_0e^{kt}$ where N is the amount after decay, No is the initial amount, e is Euler's number, k is the decay constant, and t is the time in minutes. For us, the first equation looks like this:

$7=12e^{k(70)}$ and we will solve that for k and then use that value of k in the second equation to find time.

Begin by dividing 7 by 12 to get

$\frac{7}{12}=e^{k(70)}$ Now take the natural log of both sides since the natural log and that e are inverses. The e then disappears:

$ln(\frac{7}{12})=k(70)$

Plug the left side into your calculator and then set it equal to the right side, giving us:

$-.5389965007=70k$

Divide both sides by 70 to get the k value of

k = -.00769995

Now the second equation looks like this:

$2=12e^{(-.00769995)t$ where t is our only unknown now that we know k.

Begin by dividing both sides by 12 to get

$\frac{1}{6}=e^{-.00769995t$ and take the natural log of both sides again to eliminate the e:

$ln(\frac{1}{6})=-.00769995t$

Take care of the left side on your calculator to get

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4 0

2 years ago

Work out the value of x

Korvikt [17]

Answer:

117 degrees

Step-by-step explanation:

So we already know that one angle is 38 degrees, so we have that one. The angle, 101 is exterior, and we have to subtract 180 from that to get the interior angle. We get a difference of 79. Since the sum of a triangle's interior angles are 180, we have to add 38+79 to get 117. Then, we have to subtract it from 180 to get the value of the interior angle as 63 degrees. Because x is on the outside, we have to again subtract 63 from 180 to get the missing value of x as 117.

6 0

1 year ago

Read 2 more answers

You know that your bill before tax is $52.60 and that sales tax rate is 8%. You decide to leave a 20% tip for the waiter. How mu

timofeeve [1]

Answer:

$10.52 tip should be given to the waiter.. The total bill including tax is $67.33

Step-by-step explanation:

We are given the following in the question:

Pre-tax amount = $52.60

Tip percentage = 20%

Tax percentage = 8$

Tip value =

$20\% \times 52.60\\\\=\dfrac{20}{100}\times 52.60\\\\=10.52\$$

Thus, $10.52 tip should be given to the waiter.

Tax value =

$8\% \times 52.60\\\\=\dfrac{8}{100}\times 52.60\\\\=4.21\$$

Total bill =

Pre tax amount + Tip + Tax

$=52.60 + 10.52 + 4.21\\=67.33$

Thus, the total bill including tax is $67.33

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2 years ago

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bixtya [17]

Answer by JKismyhusbandbae: a^n = 4n + 1

Explanation: So the regular formula for sequence is:

an = a1 + d (n – 1)

a1 = the first term.

d = common difference

n = term number

So in the formula form it would look like this: an: 5 - 4(n-1)

Then I like to solve it as if it were a linear equation in the end you get: a^n = 4n + 1

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2 years ago