PLEASE HELP ASAP!!!!!!!

Answers

Answer 1

Answer: the answer is 8, that line is 180° and we know 140. 180-140=40 and it’s 5x so that leaves us with 5x=40. divide 5 on both sides leaving 8

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The time it takes for an object stopped from a certain speed can be modeled by the equationt=1/2 square root v, where v is the speed of object in meters per second. if it takes 3 seconds for the object to stop, what is the speed of object in meters per second?

Answers

Given:
t = 1/2 √v
v = speed of object meters per second

t = 3 seconds

3 = 1/2 √v
3 * 2 = √v
6 = √v
6² = √v²
36 meters = v

v = 36 meters per second

In a class, 22 students have been on a plane, 28 on a train, 23 on a boat, 15 on a plane and train, 20 on a train and boat, 14 on a plane and boat, 12 on all three, and 1 on none of them. How many students are in the class?

Answers

Answer:

37 students are in the class

Step-by-step explanation:

There are 8 regions which the most inclusive clue is the inner one with 12.

"14 on a plane and boat" so we fill the intersection with plane and boat with 14-12=2
"20 on train an boat" 20-12=8 in the intersection
"15 on plane and train" = 15-12 = 3

now we look at this:

"22 students have been on a plane" 22 - (2+12+3) = 5 on the plane
"28 on a train" 28 - (12+8+3) = 5 on the train
"23 on a boat" 23-(12+8+2) = 1 on the boat

Just add up all the 8 numbers in the regions:

12+2+8+3+5+5+1+1=37

Best Answer: Q#1!
In a class, 22 students have been on a plane, 28 on a train, 23 on a boat, 15 on a plane and train, 20 on a train and boat, 14 on a plane and boat, and 12 on all three, and 1 on none of them. How many students are in the class?

(1, 5, 3, 12, 2, 5, 8, 1) = 37

Q#3!
In a class of 32 students, 17 are wearing jeans, 8 are wearing T-shirts, and 7 are wearing both. How many students are wearing jeans and something other than a T-shirt?
17 - 7 = 10

On average, it takes 4.75 hours to run a marathon. How many days will it take to run 100 marathons?

Answers

Answer:

475 hours

Step-by-step explanation:

4.75*100=475...........

If y is 5 when x is 2.5 and y varies directly with x, find y when x is 10.5
7.5
12.5
20

Answers

if y is 5 when x is 2.5 and y varies directly with x, find y when x is 10.

The term "y varies directly with x" means that the formula is a direct variation. We need to look for the constant of variation.

y = kx ; where k is the constant of variation.

k = y/x
k = 5/2.5
k = 2

We then use the direct variation formula to get the value of y when x is a certain number.

y = kx
y = 2 * 10
y = 20

The value of when y varies directly with x using the direct variation is 20.

In direct variation, the relationship between x and y can be expressed as:

y = k $*$ x