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Leya [2.2K]
3 years ago
5

Hunter's time for the 100-meter freestyle event was 57.9 seconds. His time for the second half of the race was 4.7 seconds slowe

r that his time for the first half. What was Hunter's time for the second half?
Mathematics
1 answer:
Ratling [72]3 years ago
6 0

Answer:

Step-by-step explanation:

Time for first race 57.9seconds

x=time for first half of race

x-4.7=second half of race

Equations is

x + (x-4.7)=57.9

2x-4.7=57.9

2x=57.9+4.7

2x=62.6

x=31.3

Check answer

31.3 + (31.3-4.7)=57.9

31.3 +26.6=57.9

57.9=57.9

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Simplify: (7+2a)·3–20 =
Black_prince [1.1K]
<h2>Greetings!</h2>

Answer:

6a + 1

Step-by-step explanation:

First, you need to multiply everything in the brackets by 3L

(7 + 2a) x 3 =

7 * 3 = 21

2a *  3 = 6a

21 + 6a

Now you can subtract the 20 from this:

6a + 21 - 20

Simplified down:

6a + 1


<h2>Hope this helps!</h2>
6 0
3 years ago
You buy 6 pounds of apples for $33. what is the cost of 10 pounds of apples?
n200080 [17]
10 lbs of apples will cost $55

This is simple. First, you would need to find the unit rate, which is 5.5
You find the unit rate by simply dividing 33 by 6. Next, after you found your unit rate, you're going to multiply that by 10. We now know that 10 x 5.5= 55. Therefore, you will need $55 for 10 lbs of apples.

I hope I helped :)
7 0
3 years ago
Joe has eaten 3/5 of pizza. Jane has eaten 1/7 of pizza. how many times more pizza has Joe eaten than Jane
Lana71 [14]

The answer would be 14/5.

First of all, get the denominators to be the same. The LCM is  5 × 7 = 3/5

So  1 /7 × 5/ 5 = 5 /3/5

And  2/ 5 × 7 /7 = 14 /35

Now we have  5 /35  and  14 /35

Then all you have to do is divide Joe's by Jane's to get the answer.

14 /35 ÷ 5 35 =14 /35 × 35/ 5 = 14 /5

Meaning the answer is 14/5.

Hope I could help! :)


4 0
3 years ago
Read 2 more answers
What is the solution to this system of equations?
Degger [83]

Answer:

Step-by-step explanation:

8 0
3 years ago
What is the total cost if the shirt cost $40 and 20% off
Eddi Din [679]
You'd simply have to find 20% of $40. To find the percent of a number, you would change the percent into an actual decimal/number, and then multiply them both. So the percent would become 0.20.

40 × 0.20 = 8

So now you would subtract 8 from the cost of 40.

 40 - 8 = 32.

The shirt costs $32.
7 0
3 years ago
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