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mariarad [96]
3 years ago
5

The probability that a student guesses the correct answer to a four​-choice multiple choice question is ​P(correct) = 0.25. How

many correct answers should a student expect to guess on a test with 52 four​-choice multiple choice​ questions?
Mathematics
1 answer:
lakkis [162]3 years ago
7 0
I need more information
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Find the center, vertices, and foci for the ellipse 25x^2 + 64y^2 = 1600
Alisiya [41]

Answer:

The answer to your question is below

Step-by-step explanation:

Data

Equation               25x² + 64y² = 1600

Process

1.- Divide all the equation by 1600

                             25x²/1600 + 64y²/ 1600 = 1600/1600

-Simplify

                              x²/64 + y²/ 25 = 1

2.- Equation of a horizontal ellipse

                             \frac{x^{2} }{a^{2}} + \frac{y^{2}}{b^{2}} = 1

3.- Find a, b and c

    a² = 64             a = 8

    b² = 25             b = 5

-Calculate c with the Pythagorean theorem

                   a² = b² + c²

-Solve for c

                   c² = a² - b²

-Substitution

                   c² = 8² - 5²

-Simplification

                  c² = 64 - 25

                  c² = 39

-Result

                  c = √13

4.- Find the center

          C = (0, 0)

5.- Find the vertices

          V1 = (-8, 0)     V2 = (8, 0)

6.- Find the foci

          F1 = (-√13, 0)   F2 = (√13, 0)

7 0
3 years ago
PLEASEEE HELP! 3/8x+y=3 find the intercept and sketch the line.
just olya [345]
X-intercept is 8
Y-intercept is 3
8 0
3 years ago
Factors of 72 that add up to 18
Simora [160]
6 and 12 Because 6+12=18
6 0
3 years ago
1. Solve the problem [(–7 + 2) + 4] – 3 = ?
Anna11 [10]

For number 3 it is D


4 0
3 years ago
The school that Stefan goes to is selling tickets to a choral performance. On the first day of ticket sales the school sold 3 se
aniked [119]
52 - 38 is 14 
since on the second they sold one more child ticket then the first day we know the extra money is the price of a child ticket 
so 14 is how much a child ticket is 
if 3 senior citizen tickets but 14$ = 38 
subtract 14 from38 = 24
and then 24/3 =senior ticket
child:14$
senior:8$
5 0
3 years ago
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