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Zanzabum
3 years ago
6

Select all the situations that can be modeled by the expression-80÷4. (multiple answers may be selected)

Mathematics
1 answer:
Masja [62]3 years ago
5 0

Answer:

Answer: C and D can be modeled using our expression

Step-by-step explanation:

The expression 80 / 4 is saying that you're splitting 80 into 4 equal parts.

80 / 4 = 20

Each part being 20.

Thus, you're looking for the situations where you're "splitting" 80 into 4 different things, all worth 20.

Option A.

Brady owed his mother 80, but repaid her 4. Brady is reducing his debt to his mom by 4. A good expression would be 80 - 4. You're not splitting up the debt, you're subtracting from it. Our expression doesn't fit.

Option B.

In total, the football team lost 80 yards across 4 plays. Our expression could be used here, but that would be assuming that they lost the same amount of yards (20) each play. This is unlikely, so we can't use our expression here. (E.g. they could lose 10, then 30, then 5, then 35 -- adding up to 80)

Option C.

Sam owed $80 to 4 friends, or, his $80 debt is split into 4 parts. Since he owes the same amount to each friend (all 4 parts are equal), we CAN use our expression here to find out how much he owed each friend.

Option D.

Taya received a total of 80, and divided it into 4 parts (one for each place she spent money at). Since we know she spent the same amount at each place (all parts are equal), our expression CAN be used here.

Option E.

Amanda withdrew $80 each day for 4 days. To find out the total, we'd have to multiply 80 by 4. $80 for each withdrawal, times four, as she did it 4 times. We are not splitting $80 up into parts, so our expression can't be used here.

Answer: C and D can be modeled using our expression

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I’m not sure how to do this please help!
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Answer:

sum of the interior angles x and y gives the exterior angle z

(4n-18)°+(n+8)°=(133-6n)°

4n°-18°+n°+8°=133°-6n°

4n°+n°-18°+8°=133°-6n°

5n°-10°=133°-6n°

5n°+6n°=133°+10°

11n°=143°

11°n/11°=143°/11°

n=13

exterior angle=133-6×13

=133-78

=55

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2 years ago
Determine if the statement is always, sometimes or never true.. An exterior angle of a triangle is 180 degrees
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An exterior angle of a triangle is 180 degrees is never true. The simple reason behind this logic is that 180 degrees means a straight line and it is not possible for a straight line to create an exterior angle of a triangle. I hope that this answer will come to your help.
7 0
3 years ago
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The temperature of the rod was 10°C above zero. It was kept in a freezer at 2 p.m. If
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I think it would take 6 minutes to reach temperature below 8 °C

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2 years ago
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A marching band is arranged in rows of 7 the first row has 3 band members and each row after the first has 2 more band members t
pav-90 [236]

Answer:

a_{n}= 1+2n and 63

Step-by-step explanation:

the question belongs to arithmetic sequence and a_{n} can be determined by the formula

a_{n}= a1 + d (n-1)

Let " a_{n} " represents the number of band members in the nth row

and 'd' represents the common difference.( as stated each row  has 2 more band members than the row before it)

therefore, d=2

'a1' represents first row that has three members. So, a1 = 3

->Rule for nth term will be:

a_{n}= 3 + 2(n-1)

a_{n}= 3 + 2n -2

a_{n}= 1+2n

-> In order to find total number of band members 'S_{7}'

Let S_{n} represent total number in n rows

We'll use the formula, i.e  S_{n} = n/1 (a_{1} +  a_{n})

where, n is the number of terms, a_{1} is the first term and a_{n} is the last term

So,

n=7

a_{7} = 1 + 2(7)= 15

=>S_{7} = 7/2 (3 + 15)

S_{7} = 63

The total number of band members are 63

8 0
3 years ago
What is the answer to this AND WHY! Thank you!<br><br> (−1+√5)/2​
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Answer: .618033989 or 618033989/1000000000 or 61% (Not rounded)

Step-by-step explanation:

-1+ (the sign)5 =  1.236067977 and if you divide that by two you get .618033989 or 618033989/1000000000 or 61% (Not rounded)

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3 years ago
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