All categories

2 years ago

Which of these strategies would eliminate a variable in the system of equations?

Mathematics

1 answer:

romanna [79]2 years ago

8 0

Answer:

Step-by-step explanation:

You might be interested in

What was the property of equality

loris [4]

Reflexive Property=For all real number X,X=X

A number equals itself

Addition Property=For all real number X,y & Z,. if

X=Y then X+y=y+Z

Subtraction Property=For all real number X,Y And Z if X=y then X-Z=y-Z.

7 0

2 years ago

What is the value of 2/3 cubed

Genrish500 [490]

Answer:

(2/3)^3 = (2/3) times (2/3) times (2/3) = 8/27

4 0

3 years ago

Please answer! 10 points!

aivan3 [116]

Answer:

its nine degrees

Step-by-step explanation:

this is also 5 pts btw

3 0

2 years ago

10) Jackson’s scores on the first four algebra quizzes are 79, 88, 95, and 71. What score must he earn on the fifth quiz to earn

Hoochie [10]

Based on the given information, let x represent the grade for the fifth quiz.

(79+88+95+71+x)/5=85
(333+x)/5=85
333+x=425
x=92

Jackson would have to earn a 92 on his fifth quiz to earn an average of 85.

5 0

3 years ago

Mr. Dennis gave his class a 202020-question multiple choice quiz. The distribution of raw scores had a mean of 151515 and a stan

ArbitrLikvidat [17]

Answer:

75,62.5

Step-by-step explanation:

Given that Mr. Dennis gave his class a 20-question multiple choice quiz. The distribution of raw scores had a mean of 15 and a standard deviation of 2.5

If X is the correct questions in the 20 mcq then

X is with mean = 15 and std dev = 2.5

when score is multiplied by 5

random variable now is

Y = 5x

E(Y) = Mean of Y = $5*E(x) = 75$

$Var(Y) = Var(5x) = 25 var(x) = 25(2.5^2)\\Std dev (Y) = 25 (2.5) = 62.5$

Thus new score out of 100 would have mean = 75 and std deviation = 62.5

5 0

3 years ago