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3 years ago

8

a math class has a test today there are 30 problems on the test the test has two types of problems multiple choice problems and

word problems the multiple-choice problems are worth 2 points in the word problems are worth 5 Points the teacher says

1 answer:

Misha Larkins [42]3 years ago

6 0

Fhstdyfhdhdhhdhdhdjdhdjd is the day I wanna play fortnite

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Please help me i need to know what angle "t" is

maria [59]

The angle is 90° degrees.

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3 years ago

If a 15 ft tall adult giraffe casts a 18 ft long shadow, then how long is the shadow that a 5 ft tall bird bath casts?

Lemur [1.5K]

Answer:

<h3>x = 6 ft. long shadow</h3><h3></h3>

Step-by-step explanation:

its a ratio and proportion:

<u> 15 ft. tall giraffe </u> = <u> 5 ft. tall bird </u>

18 ft. shadow x shadow

15 (x) = 18 (5)

x = 90 / 15

x = 6 ft. long shadow

8 0

3 years ago

The sum of 30 times (1/3)^(n-1) from 1 to infinity

sergeinik [125]

Let

$S_n=\displaystyle1+\frac13+\frac1{3^2}+\cdots+\frac1{3^n}$

Then

$\dfrac13S_n=\displaystyle\frac13+\frac1{3^2}+\frac1{3^3}+\cdots+\frac1{3^{n+1}}$

and

$S_n-\dfrac13S_n=\dfrac23S_n=1-\dfrac1{3^{n+1}}\implies S_n=\dfrac32-\dfrac1{2\cdot3^n}$

and as $n\to\infty$ , we end up with

$\displaystyle\lim_{n\to\infty}S_n=\lim_{n\to\infty}\sum_{i=1}^{n+1}\frac1{3^{i-1}}=\lim_{n\to\infty}\left(\frac32-\frac1{2\cdot3^n}\right)=\frac32$

So we have

$\displaystyle\sum_{n=1}^\infty30\left(\frac13\right)^{n-1}=30\cdot\frac32=45$

8 0

3 years ago

Match each geometric figure on the left with its definition on the right.

Pepsi [2]

Answer:

a

Step-by-step explanation:

3 0

3 years ago

FIRST ANSWER GETS BRAINLIEST!!!

maksim [4K]

I believe it is A and C.

There are 6 slots on the wheel, so both the numbers in A and E can be divided/multiplied to fit this criterion. For example, 3 times 2 is 6 (the number of gender slots) and 1 times 2 is two, so two out of 6 art teachers will be female.

I hope this helps!!!

8 0

3 years ago