When she was in year 8,Sarah could run 800 meters in 3 minutes and 20 seconds.

Three years later, when she was in year 11, she could run 800 meters in 2 minutes and 40 seconds.

Find the percentage improvement in her time and show your working out.

Answer:

11.8

Step-by-step explanation:

Answer:

75

Step-by-step explanation:

to find the area of a triangle, multiply the base by the height, and then divide by 2. the division by 2 comes from the fact that a parallelogram can be divided into 2 triangles. for example, in the diagram to the left, the area of each triangle is equal to one-half the area of the parallelogram.

Answer:

75

Step-by-step explanation:

The formula is hb/2

Answer:

D

Step-by-step explanation:

Given

C = 2πr ( isolate r by dividing both sides by 2π )

[tex]\frac{C}{2\pi }[/tex] = r → D

Answer:

Step-by-step explanation:

okay on your garph look at the line with the negative numbers and the line with positive numbers. Once you spot them, start with ploting (-8,0) fined -8 and make sure you also fined 0 on the positive line. You have to connect the line to make sure -8 and 0 are on the same line. Then do the same for 0,6 but both are on the positive line so it won't be hard

Answer:

-9

Step-by-step explanation:

Answer:

-9

Step-by-step explanation:

you subtract 8 from both sides the -10 then becomes -18 then you divide it by 2

Answer:

6x2−45x+21 D.

Step-by-step explanation:

(x+−7)(6x+−3)

=(x)(6x)+(x)(−3)+(−7)(6x)+(−7)(−3)

=6x^2−3x−42x+21

=6x^2−45x+21

pls mark me brainliest

Answer:

6x^2 -45x +21

Step-by-step explanation:

(x − 7)(6x − 3)

FOIL

first; x*6x = 6x^2

outer: -3x

inner: -7*6x = -42x

last: -3*-7 = 21

Add them together

6x^2 -3x-42x +21

Combine like terms

6x^2 -45x +21

Answer:

Side KL.

Step-by-step explanation:

Side KL will have a negative slope due to the reflection of side 1 , then the 90 degree clockwise rotation will  will take it down  towards the x axis and it will then have a positive slope,

Answer:

3.5 ⋅ 10^3

Step-by-step explanation:

Answer:

500

Step-by-step explanation:

(7 x 10^5) divide (2 x 10^2)

(7 x 100000) divide (2 x 100)

700000 divide 200

500

From the given polynomial , the sum is [tex]4n^4-6n^3+7n^2-9[/tex]

It is a 4th degree polynomial with 4 terms

Given :

The polynomial sum is

[tex]3n^2(5n^2 -2n +1) + (4n^2 -11n^4 -9)[/tex]

Distribute 3n^2 inside the parenthesis

[tex]15n^4-6n^3+3n^2+(4n^2-11n^4-9)\\15n^4-6n^3+3n^2+4n^2-11n^4-9\\combine \; like \; terms\\4n^4-6n^3+7n^2-9[/tex]

From the above polynomial , the highest exponent is 4

The degree of the polynomial is 4

Total we have 4 terms in the polynomial

So the final polynomial is

4th degree polynomial with 4 terms

Learn more : brainly.com/question/10024410

Answer:

A: 4th degree polynomial with 4 terms

Step-by-step explanation:

Answer:

[tex](a)F \cup H=(3, \infty)\\(b)F \cap H=(6, \infty)[/tex]

Step-by-step explanation:

Given the sets F and H of real numbers defined as given:

F={w | w>3}

H={w | w>6}

To write a set in interval  notation, we use these brackets, (  ) for < or > while we use [ or ] for [tex]\leq $ or \geq[/tex].

Since our sets are defined by strict inequalities(< or >)

In interval notation

[tex]F=(3,\infty), H=(6,\infty)[/tex]

[tex](a) F \cup H =(3,\infty) \cup (6,\infty) \\\\F \cup H=(3, \infty)\\\\(b) F \cap H =(3,\infty) \cap (6,\infty) \\\\F \cap H=(6, \infty)[/tex]

Answer:

Step-by-step explanation:

-18 1/4 rounds down to -18 and 2 2/3 rounds up to 3.  Then -18/3 = -6

Answer:

24 or 18 gallons

Step-by-step explanation:

Answer:

18 gallons. I think.

Answer:

Dam emily really got the answer tho-

Step-by-step explanation:

Because i made a random acc and typed in this  to get the answer

Answer:

400

Step-by-step explanation:

The number of eagle quarters likely to be in the bag is 200.

Option B is the correct answer.

The percentage is calculated by dividing the required value by the total value and multiplying by 100.

Example:

Required percentage value = a

total value = b

Percentage = a/b x 100

Example:

50% = 50/100 = 1/2

25% = 25/100 = 1/4

20% = 20/100 = 1/5

10% = 10/100 = 1/10

We have,

Number of quarters = 500

Out of the 10 quarters.

Eagle quarters = 4

This means,

Percentage of eagle quarters,

= 4/10 x 100

= 40%

Now,

40% of 500 quarters.

= 40/100 x 500

= 200

Thus,

The full bag is likely to have 200 eagle quarters.

Learn more about percentages here:

https://brainly.com/question/11403063

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Answer:

112

Step-by-step explanation:

11 1/5 divied by 1/10

Answer:

3.5

Step-by-step explanation:

0 1 1 3 3 3 4 5 7

median= 3

Q1= 1

Q3= 4.5

4.5-1= 3.5

Answer: 11...

If wrong I am soooo sorry

Answer:

10 grams or 0.010kg

Step-by-step explanation:

The mass of the bag used to make flour is 2.26 kg = 2260 grams

Now, in order to find out how many badges she made, we would need to divide the weight of the bag by the amount needed to make a badge.

Therefore: [tex]\frac{2260}{450} = 5.02[/tex]

We know now that the bag will make 5 batches and will have some left over. In order to find how much we used, we can multiply 5 * 450 = 2250.

Therefore, in order to make 5 batches, Maria used exactly 2250 grams of flour which in result left us with 10 grams of the bag.

Note: 2260 -2250 = 10 grams.

Subtract, in order to find how many you have left.

Hope this helps.

After making one batch of muffins, Maria will have 1.8 kg of flour remain.

What is 1 kg when it is converted into grams?

1 kg will be 1000 grams when converted.

Given,

Maria bought 2.26 kg of flour = 2260 grams of flour.

To make 1 batch of muffins, Maria needs 450 grams of flour.

Therefore, the flour Maria has after making one batch of muffin = (2260 - 450) grams = 1810 grams.

Learn more about the conversion of kg to gram here: https://brainly.com/question/18811876

#Tag #SPJ2

Answer:

Step-by-step explanation:

To solve this problem, we just need to find the common point of these linear function, beacuse they form a piecewise function which is continuous according to the problem, that means they are related by one common point.

Let's solve the following expression [tex]f(x)=g(x)[/tex], where [tex]f(x) =2x+2[/tex] and [tex]g(x)=4x[/tex]. So,

[tex]2x+2=4x\\2=4x-2x\\2x=2\\x=1[/tex]

Which means [tex]n=1[/tex], that is, if the n is greater than 1, then the function is defined by [tex]f(x)[/tex], if the n is least or equal than 1, then the functioni is defined by [tex]g(x)[/tex]

Therefore, the right answer is D.

Answer:

1. A, -1

2. D, 1

3. B, It is discontinuous because there is a value a for which f(a) is not defined 4. D, It is discontinuous because there is a value a such that lim f(x) does not exist

Answer:

It is the same distance from 0 as the original number

a rational number is any number that can be written as a fraction.

lets say she picked 1/4...the opposite would be -1/4...both are equidistant from 0.

Step-by-step explanation:

Answer:

Step-by-step explanation:

Opposite:  Shen's number changes sign, e. g., -2 to +2.

If you meant "reciprocal," then you must ensure that the denominator of the 'new' number is never zero.  3/5  =>  5/3 is ok.   But x/6  = 6/x is OK ONLY for x not equal to zero.

Answer:

7(10+5)

Step-by-step explanation:

5(17)

10(12)

7(15)

Answer:

The answer would be 7(10+5)

Step-by-step explanation:

7(10) + 7(5)

70        35

     105

Have a good day!!

Answer

3√21 cm

I hope it helps

Answer:

24%

Step-by-step explanation:

You first add the boys because you know you only look at the boys not the girls. You get the answer 233. Then you divide the number of boys who chose Niagra Falls which is 56 over 233. You will get a decimal. You then multiply the decimal by 100 to get your answer. The answer would be 24.0343348% which would round to 24%.

Answer:

Answers are below

Step-by-step explanation:

(a) (x+4)(x−4)    Factor the given expression

(b) (4x+7)(4x−7)   Factor the given expression

(c) (x²+6)(x²−6)   Factor the given expression

If these answers are correct, please make me Brainliest!

Answer:

volume of the hemisphere   ≈1577.5 cm³

Step-by-step explanation:

To find the formula for calculating the volume of a hemisphere, we will follow the steps below:

write the formula for calculating the volume of a hemisphere.

volume of a hemisphere = volume of a sphere ÷2

                                        = [tex]\frac{4}{3}[/tex]πr³   ÷   2

                                        =[tex]\frac{2}{3}[/tex] πr³

WHERE r is the radius

from the question given, radius= 9.2 cm  

π is a constant and is ≈ 3.14

we can now proceed to insert the values into the equation

volume of a hemisphere =  [tex]\frac{2}{3}[/tex] πr³

                                          = [tex]\frac{2}{3}[/tex] × 3.14 ×9.2³

                                           = [tex]\frac{2}{3}[/tex] × 3.14 ×753.571

                                          ≈1577.5 cm³   to the nearest tenth of cubic centimeter

volume of the hemisphere   ≈1577.5 cm³

Answer:

3261.8

Step-by-step explanation:

Answer:

1)all the sides of the square are equal

2)all the angles in a square are 90°

3)diagonals are perpendicular to each other

4)diagonals are in equal length

I know this properties only

I hope it was helpful to u

Answer:

x=2

Step-by-step explanation:

Since all sides of the square are equal, hence here GD=FG

so,

8x = x+14

8x-x = 14

7x = 14

Dividing both sides by 7

x=2

Answer:

2000

Step-by-step explanation:

there are 2000 pounds in a ton

Answer:

the answer is,

11.18mm

by pythagoras theorem, you'll get base diagonal as 10mm, therefore the diagonal*marked red is 11.18mm.

Answer:

[tex]5\sqrt{5} \:mm[/tex]

or

11.18 mm

Step-by-step explanation:

length of diagonal

[tex]=\sqrt{l^{2} +w^{2}+h^{2} } \\=\sqrt{8^{2} +6^{2}+5^{2} } \\=\sqrt{64 +36+25 } \\=\sqrt{125 } \\=5\sqrt{5} \: mm\\=11.18 mm[/tex]

Answer:

1.6

Step-by-step explanation:

The maximum is the greatest number

Answer:

1.6

Step-by-step explanation:

Answer:

The answer is D

Answer:

d

Step-by-step explanation: