A person's score on a Mad Minute is proportional to the amount of questions he or she answers correctly. Each Mad Minute lasts the same amount of time. On her first test, Rachel earned a score of 70 when she answered 25 questions correctly. Rachel says this relationship can be modeled with an equation.

s = 2.8y

Step-by-step explanation:

Score is proportional to the amount of correctly answered question :

Given that:

Score earned by Rachael = s =70

Number of correctly answered question = y = 25

Hence,

Score α number of correctly answered question

s = ky

70 = 25k

k = 70/25

k = 2.8

Hence, one correct answer gives 2.8

Hence,

Score obtained = 2.8 * number of questions answered correctly

s = 2.8y

step-by-step explanation:

always plug in x. in this case, x equals 4.

i'm going to first solve 4(2+3x)

1) 4(2+3(4)) use pemdas to solve.

i'm going to multiply whats in the parenthesis first, so 3 times 4=12.

2)4 (2+12) i'm then going to multiply 4 by both numbers in the parenthesis (because multiplying comes before adding)

4 times 2= 8.   4 times 12= 48

4) (8+48)= 56 (answer)

i'm then going to solve 8+12x and plug in 4 for x.

1) 8 +12(4)

multiplying comes before adding, so i'm gonna multiply 12 and 4.

12 times 4= 48.

2) 8+48=56

both equal the same!

.632

step-by-step explanation:

6 * 1/10 = 3/5

3*0.01 = 0.03

3/5 + 0.03 = .63

2*0.002 = .002

.63 + 0.002 = .632