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7nadin3 [17]
4 years ago
7

Anna does sit-ups to get ready for her first triathlon. When she starts, she does a sit-up every 22 seconds. But, as she gets ti

red, each sit-up takes longer and longer to do. Is the number of sit-ups Anna does proportional to the time she spends doing them? Choose 1 answer:
Mathematics
2 answers:
Deffense [45]4 years ago
4 0
No it is not because it is not constant
nekit [7.7K]4 years ago
3 0

Answer:

No, the number of sit-ups Anna does, are not proportional to the time she spends doing them.

Step-by-step explanation:

When Anna starts, she does a sit-up every 22 seconds. But, as she gets tired, each sit-up takes longer and longer to do.

So, no, the number of sit-ups Anna does, are not proportional to the time she spends doing them. his is because for being proportional, the decreasing or increasing rate should be constant but here, it is not.

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My cell phone charges me $100 to register and then $0.10 per minute. How much will I be charged for 55 minutes? explain why this
Arlecino [84]

Answer:

You will be charged $5.5 in 55 minutes.

Step-by-step explanation:

Just multiply 0.10 by 55 and you get $5.5 dollars.

And no I don't think this is a  Linear equation. Its not a linear equation because you have to set up a ratio to figure this out. Not a whole equation. So, Its more like a ratio

8 0
3 years ago
Write 9x² - 36x = 4y² + 24y + 36 in standard form
Kisachek [45]

Answer:

9·x² - 36·x = 4·y² + 24·y + 36 in standard form is;

(x - 2)²/2² - (y + 3)²/3² = 1

Step-by-step explanation:

The standard form of a hyperbola is given as follows;

(x - h)²/a² - (y - k)²/b² = 1 or (y - k)²/b² - (x - h)²/a² = 1

The given equation is presented as follows;

9·x² - 36·x = 4·y² + 24·y + 36

By completing the square, we get;

(3·x - 6)·(3·x - 6) - 36 = (2·y + 6)·(2·y + 6)

(3·x - 6)² - 36 = (2·y + 6)²

(3·x - 6)² - (2·y + 6)² = 36

(3·x - 6)²/36 - (2·y + 6)²/36 = 36/36 = 1

(3·x - 6)²/6² - (2·y + 6)²/6² = 1

3²·(x - 2)²/6² - 2²·(y + 3)²/6² = 1

(x - 2)²/2² - (y + 3)²/3² = 1

The equation of the hyperbola  is (x - 2)²/2² - (y + 3)²/3² = 1.

5 0
3 years ago
Find the values for X that results in congruent triangles.
umka21 [38]

Answer:

x=3

Step-by-step explanation:

1. set the sides equal to each other

8x-12=12

2. solve for x

8x=24

x=3

5 0
3 years ago
Kelsey measured 1/8 cup of onsona, 3/7 of celery, and 5/9 cup of catrots How many cups of vegetables did Kelsey measure out for
Scrat [10]

Answer:

1  1/10 cups.

Step-by-step explanation:

1/8 + 3/7 + 5/9

= 559/504

or approximately  1 1/10 cups.

3 0
3 years ago
I’m honestly confused I will mark Brainliest
Mariana [72]

Answer:

28 units !

brainliest please.

Step-by-step explanation:

6 0
3 years ago
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