All categories

3 years ago

Alan found the value of the expression (15 - 6)2 to be 189. Is he right?

1 answer:

3 0

Answer would be C

Because I always use the rule of :
B - Brackets
I - indices
D - division
M - multiplication
A - addition
S - subtraction

You might be interested in

Solve the following system of equations via elimination.<br> 12x – 9y = 30<br> 6x+15y=54

sesenic [268]

Answer:

x=4,y=2

Step-by-step explanation:

solve one of the equations for x/y and then plug it into the other

3 0

4 years ago

25% of all who enters a race do not complete. 30 haveentered.

nikklg [1K]

Answer:

The probability that exactly 5 are unable to complete the race is 0.1047

Step-by-step explanation:

We are given that 25% of all who enters a race do not complete.

30 have entered.

what is the probability that exactly 5 are unable to complete the race?

So, We will use binomial

Formula : $P(X=r) =^nC_r p^r q^{n-r}$

p is the probability of success i.e. 25% = 0.25

q is the probability of failure = 1- p = 1-0.25 = 0.75

We are supposed to find the probability that exactly 5 are unable to complete the race

n = 30

r = 5

$P(X=5) =^{30}C_5 (0.25)^5 (0.75)^{30-5}$

$P(X=5) =\frac{30!}{5!(30-5)!} \times(0.25)^5 (0.75)^{30-5}$

$P(X=5) =0.1047$

Hence the probability that exactly 5 are unable to complete the race is 0.1047

6 0

3 years ago

Equation: –4x – 5 + 2x = –11

BaLLatris [955]

<h2><u>ANSWER </u></h2>

x= 3

Step-by-step explanation:

=> -4x – 5 + 2x = -11

=> -2x = -11+5

=> -2x = -6

=> x= 6/2

=> x= 3

5 0

3 years ago

Read 2 more answers

Cant figure out the problem

Svetlanka [38]

3 1/4 inches is the mixed number

7 0

3 years ago

Read 2 more answers

Find the distance between the points (4,10) and (0,0) the answer must be a whole number

Rina8888 [55]

Answer:

d = $2\sqrt{29}$

Step-by-step explanation:

$d= \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}\\d= \sqrt{(0-4)^2+(0-10)^2}\\d= \sqrt{(-4)^2+(-10)^2}\\d= \sqrt{16+100}\\d= \sqrt{116}\\d=2 \sqrt{29}$

6 0

3 years ago