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PSYCHO15rus [73]
3 years ago
10

Solve the system of equations. 13x−y=90

Mathematics
1 answer:
SpyIntel [72]3 years ago
8 0
Just squish the two equations into one equation and idk im just typing this because i apparently need a twenty character long answer

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Carl is raising money for his football team. He is selling chocolate bars for $1.50 each and cookies for $2. He sold all 20 of h
stich3 [128]

Answer:

Carl has to sell at least 8 cookies.

c\geq 7.5

Step-by-step explanation:

Carl gets \$1.50 by selling 1 chocolate bar.

Earning from chocolate bars:

Total\ chocolate\ bar=20\\\\Earning\ from\ one\ chocolate\ bar=\$1.50\\\\Total\ earning\ from\ chocolate\ bar=Total\ chocolate\ bar\times cost\ of\ 1\ chocolate\ bar=20\times 1.5=\$30

Earning From cookies:

Let\ total\ number\ of\ cookies=c\\\\Cost\ of\ 1\ cookie=\$2\\\\Earning\ from\ cookies=2\times c=2c

Total\ earning=Earning\ from\ cookies+Earning\ from\ cookies+Earning\ from\ chocolate\ bars\\\\Total\ earning=30+2c

Carl wants to raise at least \$55

Total\ earning\geq 55\\\\2c+30\geq 55\\\\2c\geq 55-30\\\\2c\geq 15\\\\c\geq7.5

7 0
3 years ago
In an arithmetic sequence, the 10th term is 37, and the 21st term is 4. Find the common difference and the first term
Masja [62]

Answer:

Common difference is 3. And the first term is 64.

Step-by-step explanation:

The differnce between 21 and 10 is 11. So there are 11 unknown numbers in between.  And the difference between 37 and 4 is 33. 33/11 is equal to 3. So the pattern is minus three. the first term is 9 terms before 37. 9 times 3 is 27. 37+27 is equal to 64. so the first term is 64

3 0
3 years ago
What is the mode for the data in the rainfall table?<br> A:3.1<br> B:3.65<br> C:3.7<br> D: NO MODE
Hitman42 [59]

Answer:

IS THAT ALL THE QUESTION TELLS YOU? CUZ I THINK I HAVE AN ANSWER

Step-by-step explanation:

4 0
3 years ago
Mitchell currently sells stoves for company a at a salary of $12,000 plus $150 commission for each stove he sells Company B offe
ipn [44]

Answer:

Mitchell needs to sell 120 stoves for the options to be equal.

Step-by-step explanation:

Company A gives Mitchell $12000 salary plus $150 commission per stove selling and Company B is offering Mitchell $24000 salary plus $50 commission per stove selling.

So, if Mitchell sells x number of stoves such that both the plans become equal, then we can write  

12000 + 150x = 24000 + 50x

⇒ 100x = 12000

⇒ x = 120

Therefore, Mitchell needs to sell 120 stoves for the options to be equal. (Answer)

5 0
3 years ago
A dolphin jumps 54 times in a 6 hour
Kazeer [188]

Answer:

18  jumps would be  expected in a 2 hour period.        

Step-by-step explanation:

Given : A dolphin jumps 54 times in a 6 hour  period.

To find : At this rate, how many jumps would be  expected in a 2 hour period?​

Solution :

Applying unitary method,

In 6 hour period Dolphin jumps 54 times.

In 1 hour period Dolphin jumps \frac{54}{6} times.

In 1 hour period Dolphin jumps 9 times.

In 2 hour period Dolphin jumps 2\times 9 times.

In 2 hour period Dolphin jumps 18 times.

Therefore, 18  jumps would be  expected in a 2 hour period.

8 0
3 years ago
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