All categories

2 years ago

So I need the answers ASAP 30 points and brainliest

Mathematics

2 answers:

Alenkasestr [34]2 years ago

8 0

So the first one would be 6/20 which reduces to 3/10. the second one is there are likely 80 black marbles.

shtirl [24]2 years ago

7 0

Answer:

okay so count how many beads there are in all then mak eitinto a fraction and then you will gte your answer

Step-by-step explanation:

You might be interested in

What is greater three sets of 5-2 or two sets of 2+3? Draw diagrams

Inga [223]

Two sets of 2+3 is greater

8 0

2 years ago

Can someone do this for me thanks ok bye

Dvinal [7]

Answer:

log2 10 = 3x

Step-by-step explanation:

Basic Logarithm Tenets

7 0

2 years ago

Read 2 more answers

What is 31/4 in simplest form

KATRIN_1 [288]

In fraction form 31/4 is simplified. In decimal form 7.75 would be your answer.

5 0

2 years ago

Read 2 more answers

Hi, teacher I was absent these days and I didn’t understand anything about this lesson and I need help this is not count as a te

motikmotik

Given:

There are given that the cos function:

$cos210^{\circ}=-\frac{\sqrt{3}}{2}$

Explanation:

To find the value, first, we need to use the half-angle formula:

So,

From the half-angle formula:

$cos(\frac{\theta}{2})=\pm\sqrt{\frac{1+cos\theta}{2}}$

Then,

Since 105 degrees is the 2nd quadrant so cosine is negative

Then,

By the formula:

$\begin{gathered} cos(105^{\circ})=cos(\frac{210^{\circ}}{2}) \\ =-\sqrt{\frac{1+cos(210)}{2}} \end{gathered}$

Then,

Put the value of cos210 degrees into the above function:

So,

$\begin{gathered} cos(105^{\circ})=-\sqrt{\frac{1+cos(210)}{2}} \\ cos(105^{\operatorname{\circ}})=-\sqrt{\frac{1-\frac{\sqrt{3}}{2}}{2}} \\ cos(105^{\circ})=-\sqrt{\frac{2-\sqrt{3}}{4}} \\ cos(105^{\circ})=-\frac{\sqrt{2-\sqrt{3}}}{2} \end{gathered}$

Final answer:

Hence, the value of the cos(105) is shown below:

$cos(105^{\operatorname{\circ}})=-\frac{\sqrt{2-\sqrt{3}}}{2}$

4 0

8 months ago

Write a word phrase to represent the numerical expression below. 5+ (17-8)

slavikrds [6]

Jimmy asked me for 8 of my 17 cookies so i gave them to him which left me with nine so I went to the store and got 5 which gives me 14

I really dont get what your asking but I hope this helps you. If it doesn't please ask me for help ;)

7 0

2 years ago

Read 2 more answers