3 years ago

The following questions are adding and subtracting polynomials

Mathematics

1 answer:

nadezda [96]3 years ago

7 0

These are the answers, and how I grouped them up.

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Sam does 11 jumping jacks in 8 seconds. If he does the jumping jacks at a constant rate, how many jumping jacks can he do in 20

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Answer:

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Step-by-step explanation:

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3 years ago

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Riley and Erik have earned a total of 135 tokens to buy items in the school store. The ratio of the number of tokens that Riley

lisabon 2012 [21]

Answer:

<em>Riley has 72 tokens</em>

Step-by-step explanation:

<u>System of Equations </u>

We have two conditions for the tokens Riley and Erik have earned. Let's call x and y to the number of tokens of Riley and Erik respectively. The first condition states that

$x+y=135$

Solving for y

$y=135-x$

The second condition is that the ratio of the number of tokens that Riley had to the number of tokens that Erik has is 8 to 7. It's written as

$\displaystyle \frac{x}{y}=\frac{8}{7}$

Or equivalently

$7x=8y$

Replacing y from the first equation

$7x=8(135-x)$

Operating

$7x=1080-8x$

Simplifying

$15x=1080$

$\boxed{x=72}$

Riley has 72 tokens

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3 years ago

What is 7.8×10^5 hours in days?

iragen [17]

Answer:

32500 Days

Step-by-step explanation:

$7.8$ × $10^{5}$ = $780000$

We know that there are 24 hours in a day.

⇒24 Hours = 1 Day

therefore $780000$ hours = $\frac{780000}{24} = 32500$ Days

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3 years ago

Determine the domain and the range for this relationship.

Vladimir [108]

Answer:

domain 0 ≤ y ≤ 72 and the range is 0 ≤ y ≤ 6

Step-by-step explanation:

I hope this helps you.

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Adam rode a train that traveled at a constant speed of 60 miles per hour. Which graph represents the distance traveled by his tr

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Answer: need pictures

Step-by-step explanation

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