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fomenos
3 years ago
10

I need help on this.

Mathematics
1 answer:
Mice21 [21]3 years ago
6 0

Answer:

3

Step-by-step explanation:

10:15=2:3

6:x=10:(15-10)=2:1

x=3

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There is 3 red marbles, 7 white marbles, and 5 blue marbles. You draw 3 marbles replacing each one before drawing the next. What
S_A_V [24]

The jar contains 3+7+5=15 marbles in total.

We have to find the probability of the following events:

1. We choose a red marble from the jar that contains 15 marbles in total, 3 of them are red

2. We choose a blue marble from the jar that contains 15 marbles in total, 5 of them are blue

3. We choose a white marble from the jar that contains 15 marbles in total, 7 of them are white

The probability of the first event to happen is:

P_1=\frac{3}{15}=\frac{1}{5}

The probability of the second event to happen is:

P_2=\frac{5}{15}=\frac{1}{3}

The probability of the third event to happen is:

P_3=\frac{7}{15}

The probability of all three events to happen is:

P=P_1\cdot P_2\cdot P_3=\frac{1}{5}\cdot \frac{1}{3}\cdot \frac{7}{15}=\frac{7}{225}=0.0311

6 0
3 years ago
What is the total amount paid for a bill of $83.97 with a gratuity of 20%? (Round to the nearest cent.)
ra1l [238]

Answer:

Tip Amount: $ 17

Tip Each Person: $ 17

Bill Each Person: $ 84

Total (Bill + Tip): $ 101

Total Each Person: $ 101

Step-by-step explanation:

5 0
3 years ago
How do you solve the proportion7/5=x/3 ??
mote1985 [20]
The way I like to solve proportions is by cross multiplying and dividing. First yo multiply the diagonals and then you divide by the other number. So if your proportion is 7/5 = x/3, your equation would be 7*3/5.  So 7*3 is 21, so your equation is now 21/5.  With some long division, you'll see that 21/5 = 4.2  That's your answer, feel free to ask more questions if you need!!(:
5 0
3 years ago
Read 2 more answers
From the hay loft door, Ted sees his dog on the ground. The angle of depression of the dog is 40º. Ted's eye level is 16 feet ab
Vlad1618 [11]

Answer: 19 feet

Step-by-step explanation:

Hi, since the situation forms a right triangle (see attachment) we have to apply the next trigonometric function.  

Tan α = opposite side / adjacent side  

Where α is the angle of depression of the dog, the opposite side (16) is Ted's eye level above the ground, and the adjacent side (x) is the distance between the dog and the barn door.

Replacing with the values given:  

tan40 = 16/x

Solving for x  

x =16/tan40

x= 19 ft  

Feel free to ask for more if needed or if you did not understand something.  

5 0
3 years ago
If f(x) = 2x - 9, which of the following are correct? Select all that apply. f(-1) = -11 f(2) = 5 f(3) = -3 f(0) = -9 f(-3) = 15
Yuri [45]

f(-1) = -11 and f(3) = -3 . these functions are true .

What does a math function mean?

  • A relationship between a group of inputs and one output each is referred to as a function.
  •  A function is an association between inputs in which each input is connected to precisely one output.
  • A domain, codomain, or range exists for every function. f(x), where x is the input, is a common way to refer to a function.
  • In mathematics, a function is an expression, rule, or law that establishes the relationship between two variables (the dependent variable).

given function  f(x) = 2x - 9

   f(-1) = -11 ⇒ x = -1 put in function

                       f( -1 ) = 2 * -1 - 9  ⇒ - 11

    f(2) = 5   ⇒ x = 2 put in function

                    f( 2 ) = 2 * 5 - 9 = 1

    f(3) = -3  ⇒  x = 3 put in function

                     f ( 3 ) = 2 * 3 - 9 = -3

       f(-3) = 15   ⇒  x =  -3 put in function

                     f( -3) = 2 * -3 - 9 = - 15

Learn more about function

brainly.com/question/21145944

#SPJ13

3 0
1 year ago
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