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2 years ago

21/5 is the additive inverse ofa)-4.2b)-5/21c)-4.5d)5/21

Mathematics

1 answer:

Alex Ar [27]2 years ago

6 0

Answer:

It’s B but I feel it should have been -21/5

Step-by-step explanation:

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On a certain hot summer day, 481 people used the public swimming pool. The daily prices are 1.25 for children and 2.25 for adult

spayn [35]

Answer:the number of children that swam in the public pool that day is 222

the number of adult that swam in the public pool that day is 259

Step-by-step explanation:

Let x represent the number of children that swam in the public pool that day.

Let y represent the number of adult that swam in the public pool that day.

On a certain hot summer day, 481 people used the public swimming pool. This means that

x + y = 481

The daily prices are 1.25 for children and 2.25 for adults. The receipts for admission totaled to 86.25. This means that

1.25x + 2.25y = 860.25 - - - - - - - -1

Substituting x = 481 - y into equation 1, it becomes

1.25(481 - y) + 2.25y = 860.25

601.25 - 1.25y + 2.25y = 860.25

- 1.25y + 2.25y = 860.25 - 601.25

y = 259

Substituting y = 259 into x = 481 - y, it becomes

x = 481 - 259

x = 222

8 0

2 years ago

Find the gradient of the line segment between the points (-3,3) and (4,4).

ElenaW [278]

Answer:

Step-by-step explanation:

The gradient or slope of a straight line which is found between two points (x1, y1) and (x2, y2) is given by the formula:

m = (y2 - y1) / (x2 - x1)

Where y2 = 7

y1 = 3

x2 = 4

x1 = 2

=> m = (7 - 3) / (4 - 2)

m = 4 / 2 = 2

The gradient is 2.

4 0

2 years ago

Look at the picture and answer correctly so i can mark you as brainliest.

vodomira [7]

Answer:

{-8, 4, 11}

Step-by-step explanation:

Domain is the x value and the numbers have to be in order! Srry but I gtg now :(

6 0

2 years ago

Why are there 27 cubic feet in one cubic yard

kobusy [5.1K]

One cubic yard is equal to 27 cubic feet because one yard is equal to 3 feet

Solution:

Given that, there 27 cubic feet in one cubic yard

Yard and feet are units of distance

1 Yard (yd) is equal to 3 feet (ft). To convert yards to feet, multiply the yard value by 3.

The conversion factor for 1 yard to 1 feet is given as:

$1 \text{ yard } = 3 \text{ foot }$

Now find for 1 cubic yard . Cubic yard means yard raised to power 3

Therefore,

$1\ yard^3 = (3)^3\ feet^3\\\\1\ yard^3 = 27 feet^3\\\\1\ cubic\ yard = 27\ cubic\ feet$

Thus one cubic yard is equal to 27 cubic feet

Therefore, there are 27 cubic feet in one cubic feet

8 0

2 years ago

Maths question Write an algebraic expression for each of the following

kotykmax [81]

Answer:

a) 3n+5

b) n+16

c) $\frac{n-9}{2}$

d) $\frac{x-u}{x+u}$

8 0

1 year ago

21/5 is the additive inverse ofa)-4.2b)-5/21c)-4.5d)5/21​

21/5 is the additive inverse ofa)-4.2b)-5/21c)-4.5d)5/21