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3 years ago

24. Which of the following trigonometric expressions is NOT equivalent?

1 answer:

8 0

Tan t /(sec t -cos t)= sin t/(cos t *(1/cos t -cos t))
=sin t/(cos t*(1-cos ²t)/cos t))
=sin t/sin² t=1/sin t [or=cosec t.]

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Evan paid $60.54 for 3 notebooks and a calculator. If the calculator costs $45.87, how much does each notebook cost? Write a two

Aleonysh [2.5K]

Answer: 4.89$

Step-by-step explanation:

60.54 is starting amount then subtract 45.87 left with 14.67 then divide by 3 get 4.89

60.54-45.87=14.67

14.67/3=4.89

7 0

3 years ago

Read 2 more answers

Which of the numbers below could be terms in the sequence an=4n-7 A)29 B)21 C)20 D)28

natali 33 [55]

Answer:

A)29 and B) 21,

Step-by-step explanation:

First,in the sequence $a_n=4n-7$ , the parameter $n$ must to be a integer.

Second, we need to solve the equations by $n$ .

$n=(a_n+7)/4$

All the option in the problem represent an $a_n$

Then, we need to prove all number in the options, if the result is a integer number, this option can be part of the sequence.

For A)

$n=(29+7)/4=9\\$

For B)

$n=(21+7)/4=7\\$

For C)

$n=(20+7)/4=6.75\\$

For D)

$n=(28+7)/4=8.75\\$

Only A) and B) only A and B meet the requirement

4 0

3 years ago

Please help! And 20 points! :3<br> I need help with these 3 questions-<br> -3-||

Katyanochek1 [597]

Answer:

18. Its 2 meters.

19. Its 0.2 grams

20. Its 1,920

Step-by-step explanation:

When you convert 200 centimeters to meters its 2.

When you convert 2,000 milligrams in grams its 0.2

15% of 12, 800 is 1,920

Hope this helps:)

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3 years ago

Find the mode of the following data for data sets a-d (Remember what the steps are for finding the mode ).Rewrite the problem as

Nitella [24]

The mode would be 17, it’s the number that appears the most. I’m not rewriting it though

6 0

3 years ago

Find the area of the semicircle please .

NeX [460]

Answer:

39.25

Step-by-step explanation:

the formula is a = (3.14 × $r^{2}$ ) / 2

the equation is a = (3.14 × $5^{2}$ ) / 2

5 is the radius

1. $5^{2}$ = 25

2. 3.14 × 25 = 78.5

3. 78.5 / 2 = 39.25

I hope this helped! :)

3 0

3 years ago

Read 2 more answers