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bazaltina [42]
3 years ago
12

in a group of 120 people,90 of them are 30 years old or older. Everyone else in the group is younger than 20 years old. If a per

son is selected at random, what is the probability the person is less than 20 years old
Mathematics
1 answer:
Ksju [112]3 years ago
3 0
36% chance of the person being less than 20 years okd
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Blank plus 1/2 equals 8/10​
Eduardwww [97]

Answer:

8/5

Step-by-step explanation:

Hope This Helps;)

8 0
3 years ago
(3/8+2/3)+1/3 what would it be
sergij07 [2.7K]

Answer:

1.375 or 1/38

Step-by-step explanation:

(3/8+2/3)+1/3

(1.04166666667)+1/3

1.375 or 1 3/8

8 0
2 years ago
Find the equation of the circle with center at the origin that contains the point (-8,6)
Katena32 [7]
The center is at origin O(0,0).
If it contains the point, P(-8,6), then the radius r is, by Pythagoras theorem,
r=sqrt((-8)^2+6^2)=10

The general equation of a circle at centre (xc,yc) with radius r is given by
(x-xc)^2+(y-yc)^2=r^2

Substituting r=10, (xc,yc)=(0,0)
the resulting equation is therefore

(x-0)^2+(y-0)^2=10^2
or simply
x^2+y^2=100
3 0
3 years ago
Image attached with question.
butalik [34]

Answer:

x=3 5x+2=17

Step-by-step explanation:

8 0
3 years ago
Find an equation of the line that satisfies the given conditions. through (−5, −7); perpendicular to the line passing through (−
murzikaleks [220]

Answer:

The equation would be y = 2x + 3

Step-by-step explanation:

In order to solve this, we first need to find the slope of the line between (-2, 5) and (2, 3). In order to do this, we use the slope formula.

m(slope) = (y2 - y1)/(x2 - x1)

m = (3 - 5)/(2 - -2)

m = -2/4

m = -1/2

Now that we have the original line with a slope of -1/2, we can tell a perpendicular line would have a slope of 2. This is because perpendicular lines have opposite and reciprocal slopes. Now we can use that slope and the given point in point-slope form to get the answer. Be sure to solve for y.

y - y1 = m(x - x1)

y + 7 = 2(x + 5)

y + 7 = 2x + 10

y = 2x + 3

7 0
3 years ago
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