MATHEMATICS MIDDLE SCHOOL

You are swimming each 25 yard length of a swimming pool 3 seconds faster than your personal best. What integer represents your change in time of your personal best after 200 yards?

Answers

Answer 1

Answer:

Answer: He takes 24 seconds which represents change in time of his personal best after 200 yards .

Step-by-step explanation:

Since we have given that

Distance he covered by swimming = 25 yards

Time taken by him = 3 seconds

$\text{Speed of his swimming} =(Distance)/(Time)\n\n \text{Speed of his swimming} =(25)/(3)$

Now, if he covers 200 yards , the change of time will be

$\text{Time taken}=(Distance)/(Speed)\n\n\text{Time taken}=(200)/((25)/(3))\n\n\text{Time taken}=(200* 3)/(25)\n\n\text{Time taken}=8* 3\n\n\text{Time taken}=24 seconds$

Hence, he takes 24 seconds which represents change in time of his personal best after 200 yards .

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9443.2 the 4 in a the tens place is what the value of the 4 in the hundreds place

Answers

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Answer: 400

Hope that helps and enjoy Brainly :)

Help me with math please! 5 questions, 5 points each, 25 points overall! :D

Please answer EACH AND EVERY question!!

↓ ↓ ↓ ↓ ↓

Answers

first one is A and D.
2) D
3) *3-5* or 3-38.
4) 28
5) (35, 7)

these are your answers.

So 1.) is A & D

2.) D

3.) could either be 3-5 or 3-38

4.) 28

& 5.) is (35,7)

Your quite gracious with the points. :) Have fun with your homework.

Malik buys and sells car parts. He bought two tires for $45.00 each and later sold them for $65.00 each. He bought three rims for $85.00 each and later sold them for $126.00 each. He bought five headlight covers for $5.00 each and later sold them for $15.00 each. What is Malik's total profit?

Answers

Malik´s tires profit=2($65-$45)=2($20)=$40
Malik´s rims profit=3($126-$85)=3($41)=$123
Malik´s headlight=5($15-$5)=5($10)=$50

Malik´s total profit=$40+$123+$50=$213

Answer: $213

his profit =$71.00
Profit % = 52.6 % (to 1 decimal place)

A square painting has a diagonal of 44 in. Lorraine wants to frame the picture. How many inches of frame will she need? Round to the nearest inch.

Answers

The square has a diagonal of 44 inches.
In order to get the side, we need to use the pythagorean equation.

Diagonal (d) ^ 2 = side^2 + side ^ 2
Diagonal (d) ^ 2 = 2side (s)^2

d^2 = 2s^2
44^2 = 2s^2
1936 = 2s^2
2s^2 = 1936
s^2 = 968
s = 31.11 inches

The length of the side is approximately 31 inches.
Perimeter = 4*s
Perimeter = 4 * 31
Perimeter = 124 inches

So she need a total of 124 inches to frame the square.

I am sure the anwser is 124in

I hope this helps let me know! ;)

Which expression is equivalent to 5x + 5x – x + 8y – 4y?

Answers

5x + 5x - x + 8y - 4y =
(5x + 5x - x) + (8y - 4y) =
(9x) + (4y) =
9x + 4y

${\boxed{\sf\ Answer:\ 9x+4y}$

Which pair of ratios form a proportion? A.
3 : 4 and 4 : 5

B.
10 : 12 and 16 : 18

C.
7 : 10 and 10 : 14

D.
5 : 8 and 20 : 32

Answers

It would be D.5:8 and 20:32
Because 5 is to 20 [4x's] and 8 is to 32 [4x's]

D. if you rake the beginning ratio 5:8 and multiply the ratio by 4 you get 20:32. i believe this is the proper way to solve.

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