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3 years ago

How do I do a ratio?

1 answer:

6 0

A ratio is comparing one thing to another (numbers in this case). You can write ratios in many ways
here’s three different ways.
There are four girls and and 2 boys.
The ratio of girls to boys is:
4:2
4 to 2
4/2

*THE RATIO MUST ALWAYS BE IN ORDER!!! If boys come first in the problem WRITE THE BOYS NUMBER FIRST! If girls come first, WRITE THE GIRLS FIRST IN THE RATIO!!! (That’s a very common mistake) hope this helps!

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Find the sum of 997 + 992 + 987 +...+ 257 +252

Vikentia [17]

Answer:

93,675

Step-by-step explanation:

We see that the given sequence is an arithmetic sequence with first term 997, common difference -5, and last term 252.

The number of terms in the sequence (n) can be found from the formula for the n-th term:

an = a1 +d(n -1)

(an -an)/d +1 = n

(252 -997)/(-5) +1 = n = 150

The sum of these terms is the average of the first and last terms, multiplied by the number of terms:

S150 = (997 +252)/2·150 = 93,675

The sequence sum is 93,675.

7 0

3 years ago

Two six sided dice are rolled. What is the probability of the total being less than or equal to 4?

Marysya12 [62]

Step-by-step explanation:

The ways to get a total of four or less with two fair dices are:

(1,1)

(1,2)

(1,3)

(2,1)

(2,2)

(3,1)

out of 36 possible outcomes, so the probability is

P(<=4) = 6/36 = 1/6

8 0

4 years ago

Please. I’m begging for help. I have no idea what to do. Could you possibly explain on how to do it

Lostsunrise [7]

99% sure this I correct
8-6=2
6/15=2/a
a=15•2/6
a=30/6
a=5

X=a+15
X=5+15
X=20

8 0

3 years ago

2. A golfer will play two holes of a course. Suppose that on each hole the player will score 3, 4, 5, 6, or 7, with these five s

pshichka [43]

Answer:

The probability that the player’s total score for the two holes will be 14 is 0.04

The probability that the player’s total score for the two holes will be 12 is 0.12

Step-by-step explanation:

Consider the provided information.

Each hole the player will score 3, 4, 5, 6, or 7, with these five scores being equally likely.

A) 14

It is given that the player’s total score for the two holes will be 14.

There is only one possible case to get a total score of 14.

If the player scores 7 on each hole, which is P(7)× P(7).

$P(7) = \frac{1}{5}$

Thus, the required probability is:

$P(Total:14)=P(7)\times P(7)$

$P(Total:14)=\frac{1}{5}\times \frac{1}{5}=0.04$

Hence, the probability that the player’s total score for the two holes will be 14 is 0.04

B) 12

It is given that the player’s total score for the two holes will be 12.

There are three ways to have a total score of 12.

7+5 = 12, 6+6 = 12, 5+7 = 12

$P(5)=P(6)=P(7)=\frac{1}{2}$

Thus, the required probability is:

$P(Total:12)=P(7)\times P(5)+P(6)\times P(6)+P(5)\times P(7)$

$P(Total:12)=\frac{1}{5}\times \frac{1}{5}+\frac{1}{5}\times \frac{1}{5}+\frac{1}{5}\times \frac{1}{5}=0.12$

Hence, the probability that the player’s total score for the two holes will be 12 is 0.12

6 0

4 years ago

12(x + 3)= 4(2x +9) +4x

Ivanshal [37]

Answer:

All real numbers

Step-by-step explanation:

12(x+3)=4(2x+9)+4x

First you are going to distibute 12 and 4 into the paranthese to get:

12x+36=8x+36+4x

Next you are going to combine like terms (the 8x and 4x) to get:

12x+36=12x+36

Since both sides of the equation equal each other this means that x can equal any real number since they always equal each other.

3 0

3 years ago

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How do I do a ratio?​

How do I do a ratio?