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LekaFEV [45]
3 years ago
11

A student ran out of time on a multiple choice exam and randomly guessed the answers for two problems. Each problem had 5 answer

choices- a, b, c, d, e- and only one correct answer. What is the probability that he answered both of the problems correctly? Write your answer as a fraction in simplest form.
Mathematics
1 answer:
dsp733 years ago
6 0
2 problems and 5 answer choices = 5 x 5 = 25 possibilities

1 correct answer out of 5 = 1/5
1/5 x 1/5 = 1/25
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The lenghts of two in an isosceles triangle are 8 cm and 4 cm then the perimeter of the triangle is ............cm
anastassius [24]
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<u>Step-by-step explanation:</u>

sides are 4cm, 8cm, 8cm ----( because isosceles triangle have 2 sides equal )

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= 4 + 8 + 8

<h3> = 20cm</h3><h2>-------------------------------------</h2><h2>FOLLOW ME</h2>
7 0
3 years ago
A rectangle has an area of 143 square meters and a width of 6. 5 meters. What is the length, l, of this rectangle? l = 121 m l =
lapo4ka [179]
L = 22 because area equals length times width. So if you divide the area (143) by the width (6.5) you get 22
8 0
2 years ago
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If f(x) = −2 + 8, what is f(−1.8)?<br> 4<br> 6<br> 10<br> 12
Oksanka [162]
F(x) = -2 + 8

f(x) = 6

No matter what x is, it does not change the value of f(x).

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Answer: 6
5 0
3 years ago
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The length of a rectangle is 8 inches longer than the width. If the area is 295 square inches, find the
sladkih [1.3K]

Answer:

L=21.6in and w=13.6

Step-by-step explanation:

If the length is 8 inches longer than its width, we can write the width as "w" and the length as the width w+ 8

Area is (width)(Length) = (width)(width+8)

W

----------

| |

| |

| | L = w+8

| |

| |

-----------

A = (w+8)(w)

A = w2 + 8w = 295.

(Problem states that area is 295 sq in)

Need to solve this quadratic equation

w2 +8y - 295 = 0

Factor:

(w - 13.64) (w + 21.64) = 0

So

w - 13.64 = 0. or. w + 21.64= 0

Solve these and get

w = 13.64. or. w = -21.64

Only one that makes sense in real life is the poitive one.

So the dimensions are

Width = 13.64 inches

Length = 21.64 inches

7 0
3 years ago
. On Tuesday, Bellagio's Pizza sold 60 plain pizzas at $5 each; 20 meatball pizzas at $8 each; 25 Sicilian pizzas at $9 each; an
Alexeev081 [22]
The answer is D because 

60 times 5=300

20 times 8=160

25 times 9=225

33 times 10=330

Then add all of them and it gives you $1,015
4 0
3 years ago
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