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3 years ago

Can someone please help meeee worth 20 points

Mathematics

2 answers:

STatiana [176]3 years ago

4 0

Answer: 23%!

Step-by-step explanation:

Kobotan [32]3 years ago

4 0

Answer:

27%

Explanation:

8/30 (8 juniors overall 30 total students)

=0.266 or 27% rounded to the whole number

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Help me plz I don't understand this

neonofarm [45]

Answer:

D. $\frac{10}{15}$ and $\frac{14}{21}$

Step-by-step explanation:

Proportional ratios are ratios that represent the same relationship. One way to check this is to reduce the ratios, because if they are proportional, they will equal the same thing. Both $\frac{10}{15}$ and $\frac{14}{21}$ simplify to $\frac{2}{3}$ .

Hope this helps!!

7 0

3 years ago

Read 2 more answers

I need help with angles in a triangle to find x<br> I need help with these. please :(

Ludmilka [50]

Answer:

$a. \: \: x = {60}^{o}$

$b. \: \: x = {24}^{o}$

Step-by-step explanation:

Sum of angles = 180°

<h3>Simplify :</h3>

$a. \: \: {x}^{o} + {40}^{o} + {80}^{o} = {180}^{o}$

${x}^{o} + {120}^{o} = {180}^{o}$

${x}^{o} = {180}^{o} - {120}^{o}$

${x}^{o} = {60}^{o}$

$b. \: 96+(x+12)+2x=180$

$x+108+2x=180$

$3x+108=180$

$3x=180−108$

$3x=72$

$x = 24$

<h3>Hope it is helpful...</h3>

7 0

3 years ago

My question is in the picture

vova2212 [387]

9514 1404 393

Answer:

$1250

Step-by-step explanation:

The revenue from sales for 1000 units is given as $20,000, so the revenue per unit is $20. If we assume that rate remains the same, then the revenue from sales of 1250 units will be $20 × 1250 = $25,000.

The variable expenses for 1000 units are shown as $12,000, so are $12 per unit. If those go up by $1 per unit, the variable expenses for 1250 units will be $13 × 1250 = $16,250.

The contribution margin at these new rates will be ...

$25,000 -16,250 = $8750

The increase in advertising will raise fixed expenses to $6000 +1500 = $7500. The difference from contribution margin is the operating income:

operating income = $8750 -7500 = $1250

_____

<em>Alternate solution</em>

The contribution margin is given as $8000 for sales of 1000 units, or $8 per unit. If the variable cost increases by $1 per unit, this goes down to $7 per unit. Then the contribution margin from sale of 1250 units is $7 × 1250 = $8750, same as above. The rest of the the operating income calculation is the same.

4 0

3 years ago

Will give extra points

ANTONII [103]

Answer: what is this again?

Step-by-step explanation:

7 0

3 years ago

Fischer and Spassky play a chess match in which the first player to win a game wins the match. After 10 successive draws, the ma

Sidana [21]

Answer:

the probability that Fischer wins the match is 0.5714

p( D = d ) = { $( 0.3 )^{d-1$ $(0.7)$ , d = 1, 2, 3, ........

$0$ otherwise

Step-by-step explanation:

Given that;

probability that Fischer wins the match, p = 4

probability that Spassky wins the match, q = 0.3

Match drawn, 1 - p - q = 1 - 0.4 - 0.3 = 0.7

(a) What is the probability that Fischer wins the match?

P( Fischer wins) = p/( p+q)

we substitute

P( Fischer wins) = 0.4 / ( 0.4 + 0.3)

P( Fischer wins) = 0.4 / 0.7

P( Fischer wins) = 0.5714

Therefore, the probability that Fischer wins the match is 0.5714

b) What is the PMF of the duration of the match?

let D represent the duration of the match

since the duration D of the match is a geometric random variable with parameter p + q,

the PMF will be;

p( D = d ) = $( 1 - p - q )^{d-1$ ( p + q )

= $( 1 - 0.4 - 0.3 )^{d-1$ ( 0.4 + 0.3 )

p( D = d ) = $( 0.3 )^{d-1$ ( 0.7)

that is, p( D = d ) = { $( 0.3 )^{d-1$ $(0.7)$ , d = 1, 2, 3, ........

$0$ otherwise

7 0

3 years ago