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USPshnik [31]
3 years ago
14

حلل المقدار الجبري 3س5 + 3س² ***الرقم 5 هو أس ل س​

Mathematics
1 answer:
Leviafan [203]3 years ago
7 0

Answer:

Step-by-step explanation:

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Peggy had three times as many quarters as nickels. She had $1.60 in all. How many nickels and how many quarters did she have?. .
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Let

n-------> the number of nickels

q------> the number of quarters

we know that

1\ quarter=\$0.25\\1\ nickel=\$0.05

so

0.05n+0.25q=1.60 ----> equation A

q=3n ----> equation B

substitute equation B in equation A

0.05n+0.25[3n]=1.60

0.05n+0.75n=1.60

0.80n=1.60

n=2

Find the value of q

q=3*2=6

therefore

<u>The answer part a) is</u>

the number of nickels are  2  and the number of quarters are 6

<u>the answer Part b) is</u>

The expressions that represents the number of quarters is

q=3n


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3 years ago
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Which of the following DOES NOT have any rectangular faces? A. pentagonal prism B. hexagonal pyramid C. rectangular prism D. squ
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A pentagonal prism, a rectangular prism, and a square pyramid all have rectangular faces but a hexagonal pyramid does not.

A hexagonal pyramid only consists of a hexagon and triangles. Therefore, the answer is B. Hexagonal Pyramid.
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Solve 3[-x+(2x+1)]=x-1
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Answer:

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Step-by-step explanation:

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In a quiz contest, 4 marks were awarded for a correct answer and -2 marks were given for an incorrect answer. If James gave 5 in
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Answer:

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Step-by-step explanation:

For c correct answers and 5 incorrect answers, James's score is ...

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James gave 10 correct answers.

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