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Law Incorporation [45]
3 years ago
7

Emalynn has one hour to answer 9science questions. She will spend an equal amount of time on each question. What fraction of one

hour does she spend on each science question?
Mathematics
1 answer:
devlian [24]3 years ago
8 0

Step-by-step explanation:

you will just make hour as minutes

so it will be 1h=60m

on each science question:  60/9 =20/3 =6.6667

more it helps

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Find the area of an octagon whose perimeter is 120 cm.
stira [4]

Answer:

The area of an octagon whose perimeter is 120 cm is 1086.4 cm^{2}

Step-by-step explanation:

An octagon is a polygon with eight sides. If the lengths of all the sides and the measurement of all the angles are equal, the octagon is called a regular octagon.

There is a predefined set of formulas for the calculation of perimeter, and area of a regular octagon.

The perimeter of an Octagon is given by

P=8a

and the area of an Octagon is given by

A=2a^{2}(1+\sqrt{2})

We know that the perimeter is 120 cm, solving for side length (a) in the perimeter formula we get

120=8a\\\frac{8a}{8}=\frac{120}{8}\\a=15

Now, we calculate the area

A=2a^{2}(1+\sqrt{2})\\A=2(15)^{2}(1+\sqrt{2})\\A=450\left(1+\sqrt{2}\right)\\A\approx 1086.4 \:cm^{2}

5 0
3 years ago
Marcus has $28 to spend. He spent $3.75 to buy a notebook. He needs to save $11.25 but he wants to buy a snack. Chips cost $1.30
Alborosie

Total money Marcus has = $28

Money spent to buy a notebook = $3.75

Money left now = 28-3.75=24.25

Money needed to be saved = $11.25

So, the amount of money Marcus can spend = 24.25-11.25=13

Cost of a packet of chips = $1.30

The inequality to determine the maximum number of chips he can buy is:

Let the number of chips Marcus can buy = x

As he cannot spend more than $13 to buy chips so equation becomes:

1.30x\leq 13

Solving this we get

x\leq 10

Hence, Marcus can buy a maximum of 10 packs of chips and  save $11.25



4 0
2 years ago
The figure shows square KLMN. Which of the following conditions satisfy the criteria for squares?
BartSMP [9]

Answer:

First option: SquareKLMN with diagonals LN and KM.

Fifth option: Segment LMis parallel to segment KN.

Step-by-step explanation:

We know that a square is quadriteral whose sides are equal.

By definition, a square has the following properties:

1) Its four sides are congruent.

2) The diagonals are congruent.

3) The angles formed by the intersection of the diagonals measure 90 degrees.

4) The opposite sides are parallel.

5) Each internal angle measures 90 degrees.

Notice in the figure that:

  • The diagonals of the square  KLMN are: LN and KM.

  • LM and KN are opposite sides, therefore, they are parallel.
7 0
3 years ago
Read 2 more answers
If f(x) = 4x - 3, evaluate f(2).
hjlf

Answer: f(2) = 5

Explanation: If f(x) - 4x - 3, then f(2) = 4(2) - 3 which simplifies to 5.

8 0
3 years ago
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Delvig [45]
The answer on the picture is d
4 0
2 years ago
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