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2 years ago

15

A survey found that 30% of teenagers don’t wear a seatbelt. If five teenagers are selected at random, find the probability that

at least three of them don’t wear a seatbelt.

1 answer:

irina1246 [14]2 years ago

5 0

Answer:

60%

Step-by-step explanation:

You might be interested in

Show ALL your calculations.

Nesterboy [21]

Answer:

<DEB= 125 degrees

Step-by-step explanation:

To get this, you would need to know all 2 angles of the triangle.

To find the first angle, simply do 180-107 to get 73(because supplementary angles add up to 180 degrees).

Next, 180-52(given angle)-73 to get 55 because the 3 angles of a triangle add up to 180(triangle angle sum theory).

You would see that <DEB is part of another supplementary angle so, do 180-55 to get 125.

<DEB=125 degrees.

8 0

2 years ago

Read 2 more answers

Solve the inequality.<br> 3x + 5<br> ———- <4<br> 2<br><br> x < [?]

astra-53 [7]

Answer:

$x \leqslant 1$

Step-by-step explanation:

first multiply both side by 2 to get rid of the fraction

$3x + 5 \leqslant 4(2)$

$3x + 5 \leqslant 8$

$3x \leqslant 8 - 5$

$3x \leqslant 3$

$x \leqslant 1$

3 0

2 years ago

On December 13th, Shaquille O'Neal scored his season high in points with a total of 40. His 40 points were scored all on free th

aleksandrvk [35]

The answer 40

Explain: aowgwowugwowfwlwgwbwwwyHw

3 0

2 years ago

Read 2 more answers

A third-grade class is told to send a valentine to every single one of their classmates. On Valentine’s Day, the class ends up w

FinnZ [79.3K]

306 is the total cards sent by all the students in the class. Lets say x is the number of students in class, therefore each student needs to send x-1 cards (since they do not send themselves a card). So depending on your level of math, you could either take the complex way to solve it using quadratic equations, or just find the number that if multiplied by itself then subtracted, gives you 306.
$(x \times x) - x = 306 \\ lets \: try \: 18 \\ (18 \times 18) - 18 = 306 \\ so \: x = 18$
===============
Complex way
$(x \times x) - x = 306 \\ {x}^{2} - x - 306 = 0$
So a = 1, b = -1, c=-306
using the quadratic equation:
$x = \frac{ - b + \sqrt{ {b}^{2} - 4ac } }{2a}$
$x = \frac{1 + \sqrt{1 - (4 \times 1 \times - 306)} }{2} \\ x = \frac{1 + \sqrt{1 - ( - 1224)} }{2} \\ x = \frac{1 + \sqrt{1225} }{2} \\ x = \frac{1 + 35}{2} \\ x = \frac{36}{2} \\ x = 18$

8 0

2 years ago

Read 2 more answers

Jerry left a $3. tip on a meal that cost $35. What percent of the meal's cost was the tip? What was the total cost of the me

Brums [2.3K]

3/35 = 0.0857 = 8.57% <== percent of the tip

35 + 3 = 38 <== total cost

4 0

3 years ago