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icang [17]
2 years ago
7

Elvira was trying to find out the number of students in the courtyard during lunch. She doesn’t remember how many students were

there to start, but knows how many students there were at the end of the lunch period. These are her observations: · The original students were joined by four more students. · Those students were each joined by 2 students, multiplying the students by 3. · Half the students left. If there were 15 students at the end of the lunch period, which equation would help Elvira find how many students were in the courtyard at the beginning of lunch?
SOMEONE, ANYONE PLEASE HELP ME WITH THIS QUESTION :(
ANYONE CAN HELP IF THEY WANT, PLEASE!!!!
Mathematics
1 answer:
il63 [147K]2 years ago
4 0

Answer:

2x3=6+9=15?

Step-by-step explanation:

Im sorry if i didnt help.

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The length of a picture frame is 8 inches more than the width. For what
leva [86]

Answer:

For, "x" greater than 34, the perimeter of the picture frame greater than 152 inches

Solution:

Let "x" be the width of the frame

Given that, The length of a picture frame is 8 inches more than the width

Therefore,

Length = width + 8

Length = x + 8

The perimeter of rectangle is given by formula:

Perimeter = 2(length + width)

Substituting the values we get,

Perimeter = 2(x + 8 + x)

Perimeter = 2(2x + 8)

Perimeter = 4x + 16

The perimeter of the picture frame greater than 152 inches

Perimeter > 152

Therefore, for, "x" greater than 34, the perimeter of the picture frame greater than 152 inches

Step-by-step explanation:

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7 0
2 years ago
Read 2 more answers
hail 0.5 inch deep and weighing 1800 pounds covers a roof. the hails weight varies directly with its depth. write an equation th
frozen [14]

In a directly proportional relationship, increasing one variable will increase another. The weight of the roof whose depth is 1.75 inches is 6,300 pounds.

<h3>What is the directly proportional relationship?</h3>

In a directly proportional relationship, increasing one variable will increase another. This directly proportional relationship between p and q is written as p∝q where that middle sign is the sign of proportionality.

Let there are two variables p and q. Then, p and q are said to be directly proportional to each other if p = kq, where k is some constant number called the constant of proportionality.

Given the hail's weight varies directly with its depth. Therefore, the relation can be written as,

Weight ∝ Depth

W∝D

Introducing the constant to remove the proportionality we will get the equation as,

W = kD

1800pounds = k × 0.5 inches

3600ponds/inches = k

Now, the weight of the roof whose depth is 1.75 inches can be written as,

W = kD

W = 3600 × 1.75

W = 6,300 pounds

Hence, the weight of the roof whose depth is 1.75 inches is 6,300 pounds.

Learn more about directly proportional relationship:

brainly.com/question/13082482

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8 0
2 years ago
Help please!(picture)
UkoKoshka [18]

Answer:

7a - 2

Step-by-step explanation:

A perimeter is just the sum of all sides added together, so just put all the expressions together into a big equation.

2a - 3 + 2a + 3a + 1

Combine like terms

7a - 2

5 0
3 years ago
40 is the sum of 15 and Craig's savings.<br> Use the variable c to represent Craig's savings.
andrew-mc [135]
40=15+c

Hope it helps
8 0
2 years ago
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A towns population went from 25,800 to 42600 what was the percent of change
ivolga24 [154]
About 165.1% increase
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