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2 years ago

Plz help me with this question 15 pt

Mathematics

1 answer:

Schach [20]2 years ago

8 0

8 1/2 . answered from desmos calculator

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Helpppp!!!!! I really need it. Pleaseee!!

viktelen [127]

I think it is 47 hope it helps

6 0

3 years ago

Solve for the variable 8x+7=-9

sukhopar [10]

Answer:

x=-2

Step-by-step explanation:

first u subtract 7 on both sides resulting on 8x=-16. Then to isolate x u divide by 8 on both sides.

4 0

2 years ago

Read 2 more answers

5 (r-10)= -51 what is r

Vedmedyk [2.9K]

Steps to solve:

5(r - 10) = -51

~Distribute left side

5r - 50 = -51

~Add 50 to both sides

5r = -1

~Divide 5 to both sides

r = -1/5

Best of Luck!

6 0

2 years ago

A group of 8 friends (5 girls and 3 boys) plans to watch a movie, but they have only 5 tickets. If they randomly decide who will

Eddi Din [679]

Answer:

D. 0.821

Step-by-step explanation:

A probability is the number of desired outcomes divided by the number of total outcomes.

The combinations formula is important to solve this question:

$C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

Desired outcomes

The order is not important. For example, Elisa, Laura and Roze is the same outcome as Roze, Elisa and Laura. This is why we use the combinations formula.

At least 3 girls.

3 girls

3 girls from a set of 5 and 2 boys from a set of 3. So

$C_{5,3}*C_{3,2} = 30$

4 girls

4 girls from a set of 5 and 1 boy from a set of 3. So

$C_{5,4}*C_{3,1} = 15$

5 girls

5 girls from a set of 5

$C_{5,5} = 1$

$D = 30+15+1 = 46$

Total outcomes

5 from a set of 8. So

$T = C_{8,5} = 56$

Probability

$P = \frac{D}{T} = \frac{46}{56} = 0.821$

So the correct answer is:

D. 0.821

6 0

2 years ago

Read 2 more answers

Helppppp

sasho [114]

Answer:

186.5 + 2x

Step-by-step explanation:

First, radify 25. Luckily it's a perfect square so it will be 5.

Second, divide within the parentheses. You're expression should look like this.

(93-5+x+42/8)2

Divide 42/8. The decimal form would be 5.25, while the fraction should be 5 1/4.

Third, solve within the parentheses from left to right. Right now you're expression should look like this:

(93-5+x+5.25)2

Add all like terms

93-5+5.25=93.25

Fourth, multiply. Right now the expression should look like this:

(93.25 + x) 2

186.5 + 2x

8 0

3 years ago