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Rufina [12.5K]
3 years ago
15

An unprepared student makes random guesses for 6 multiple choice questions that have selections a -

Mathematics
1 answer:
kirill [66]3 years ago
6 0
 <span>P(at least 1 ) = 1 - P(exactly none) = 1 - (4/5)^6 = .738
Hope this helps!!!:)</span>
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Find the value of x and y
vova2212 [387]

let's first off take a look at the <u>tickmarks</u>, three <u>side tickmarks</u>, so all those 3 sides are equal, all have a length of y - 25, so is an equilateral triangle.

there are two <u>angle tickmarks</u>, meaning those two angles are equal, wait a second! if those two angles are equal, that means is an isosceles triangle.

now, in an equilateral triangle, all sides are equal, but also all angles are equal, since the sum of all interior angles is 180°, then each angle is really 60°.

let's notice that angle on the upper-left-corner, is a right-angle, but 60° are on the equilateral triangle, and so the remaining 30° must be on the isosceles triangle.

the isosceles triangle has then a vertex of 30°, and twin angles, the twin angles let's say are each a° so then

30° + a° + a° = 180°

30 + 2a = 180

2a = 150

a = 75° = y

now, let's recall, the isosceles triangle has twin angles but it also has twin sides, so the side "x" and the side with the tickmark are equal.

well, we know that y = 75, so the sides with the tickmark are then (75) - 25 = 50 = x.

5 0
3 years ago
a car recently sold for $32,345. if there is a 6% sales tax on automobile sales, how much tax will be added to the price of the
geniusboy [140]
6% of $32,345 is $1,940.70, your decimal point is off by 1 place :)
7 0
2 years ago
HOW MANY TIMES DOES 6 GO INTO 25
Sveta_85 [38]

Answer:

25/6 = 4 with a remainder of 1

8 0
3 years ago
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If A and B are two angles in standard position in Quadrant I, find cos( A + B) for the given function values.
Naddik [55]
You have to find the cos of angle A, so use the Pythagorean equation and trig laws to find the other side of the triangle created by angle A. 3^2 + x^2 = 5^2. x=4. This means cos(A) = 4/5). Make both cos (A) and cos (B) have equal denominators, and add. 148/185 + 60/185 = 208/185. This answer is correct, though it doesn’t appear to be any of the answers you wrote, so either those answers are wrong or you wrote something incorrectly in the problem.
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2 years ago
Tell me the ordered pair for the y-intercept.
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(0 , 3) is the ordered pair
6 0
3 years ago
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