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2 years ago

12

Mateo is doing an experiment for Physics class. He drops a bouncy ball off a

1 answer:

irina [24]2 years ago

4 0

Answer:

Max. height following bounce # n is 12(¾)n because each prior height is multiplied by three fourths.

Step-by-step explanation: it jus is

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If sin theta = 1/3 and tan theta < 0, what is the value of cos theta?

STatiana [176]

If sin Ф=1/3>0 and tan Ф<0; then Ф belongs to the second quadrant and cos Ф will be negative (cos Ф<0).

sin²Ф+cos²Ф=1
(1/3)²+cos²Ф=1
1/9+cos²Ф=1
cos²Ф=1-1/9
cos²Ф=8/9
cos Ф=⁺₋√(8/9)=⁺₋2√2 / 3

We have two possible solutions.
cos Ф=2√2 / 3 This solutions is not possible, because in this case cos Ф has to be negative (cos Ф<0)

cos Ф=(-2√2) / 3 this solutions is right.

answer:B. -2 square root 2 /3 (or (-2√2) /3 )

5 0

2 years ago

Which system of equation is represented

olga nikolaevna [1]

Answer:

D

Step-by-step explanation:

First, let us figure out what is graphed and then manipulate each answer to try to match it.

The one with a positive slope is

$y\leq x-2$

The one with the negative slope is

$y\geq 3-2x$

Now that we have our graphed system of inequalities, we can try to match them to an answer.

A. while the x-2 is the same, the other does not have an x, so it cannot match.

B. The second inequality has the wrong sign, so it is impossible for this to be our answer.

C. When each of these are solved for y, you get $y\leq 2x-3\\\\y\leq 2-x$ . Neither of these match so this cannot be correct.

D. When the first inequality is solved you get $y\geq 3-2x$

When the second inequality is solved you get $y\leq x-2$

As both of these answers match our graphed inequalities, D is the correct answer.

4 0

3 years ago

Of 15 possible books, you plan to take 7 with you on vacation. How many different collections of 7 books can you take?

cestrela7 [59]

Am I the only one that doesn’t get what the question is asking
I feel like 1 piece of information is missing

Like how much in a collection?

7 0

2 years ago

Read 2 more answers

(T/F) unknow values are represented with variables that can be any letter. which one true or false

Ivenika [448]

Answer:

True.

Step-by-step explanation:

8 0

2 years ago

What is the value of S4 for

zzz [600]

Answer:

90

Step-by-step explanation:

To find s4 we find sum of values when n=1,n=2,n=3,n=4

given expression is $6(2)^{n-1}$

n=1 , plug in 1 for n

$6(2)^{1-1}=6$

n=2

$6(2)^{2-1}=12$

n=3

$6(2)^{3-1}=24$

n=4

$6(2)^{4-1}=48$

Sum of all 4 terms = 6+12+24+48=90

4 0

2 years ago