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2 years ago

A jar contains nickels and dimes. There are 20 coins in the jar, and the total value of

Mathematics

1 answer:

weeeeeb [17]2 years ago

3 0

Answer:

Step-by-step explanation:

n and d are the number of nickels and dimes, respectively.

"there are 20 coins"

n+d = 20

d = 20-n

"total value is $1.40"

0.05n + 0.10d = 1.40

0.05n + 0.10(20-n) = 1.40

-0.05n + 2 = 1.40

0.05n = 0.6

n = 12

d = 20-m = 8

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Which of the following sequences is an arithmetic sequence? 1, 2, 4, 8, 18, ... 10, 12, 14, 16, 18, ... 200, 100, 50, 25, ... 4,

Leni [432]

The sequence 10, 12, 14, 16, 18, ... is an arithmetic sequence, with the common difference being 2.

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2 years ago

Mr. Wilson drives 450 miles in seven hours. At this rate, about how many miles does he drive in six hours? A) 101 B) 254 C) 340

Deffense [45]

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2 years ago

Following one side of a rural road, the house numbers increase by eighteen. The house number of the first house on the road is 8

ad-work [718]

Answer:

Recursive:

$a_n=a_{(n-1)}+18\\ \\ a_1=82$

Explicit:

$a_n=64+18n$

Explanation:

1. Sequence:

$a_1=82\\ \\ a_2=82+18=100\\ \\ a_3=100+18=118\\ \\ a_4=118+18=136\\ \\ ...$

2. Recursive formula

The recursive formula permits to calculate the value of the nth term in the sequence using the (n-1)th term in the sequence.

$a_n=a_{(n-1)}+18\\ \\ a_1=82$

3. Explicit formula

The explicit formula permits to calculate any value of a term in the sequence:

$a_n=a_1+(n-1)d\\ \\ a_n=82+(n-1)18\\ \\ a_n=82+18n-18\\ \\ a_n=64+18n$

7 0

2 years ago

Pls answer!!!!!! The sum of two numbers is 46 and the difference is 20 what are the numbers?

katen-ka-za [31]

Answer:

33 and 13

Step-by-step explanation:

46/2 = 23

difference is 20, add 10 to one and subtract 10 from 23, giving you two numbers: 13 and 33.

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2 years ago

PLEASE ANSWER QUICKLY

GaryK [48]

We have that
1/4 x + 2/3 y = 5 ----> multiply by 12 both sides---> 3x+8y=60
1/2 x + 3/2 y = 11---> multiply by 2 both sides----> x+3y=22

therefore

the answer is the option
B. 3x + 8y = 60 ; x + 3y = 22

8 0

3 years ago

Read 2 more answers