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timama [110]
3 years ago
6

EXPERT HELP I'LL GIVE BRAINLIEST: C or D

Mathematics
1 answer:
denis23 [38]3 years ago
6 0

Answer:

Step-by-step explanation:

A=(3.14d^2)/4

A=0.785d^2

A=0.785(10^2)

A=78.5 yd^2

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Elijah has $0.55 worth of pennies and nickels. He has twice as many nickels as pennies. Determine the number of pennies and the
maxonik [38]

Answer:

The number of nickels are <u>10</u> and number of pennies are <u>5</u>.

Step-by-step explanation:

Given:

Elijah has $0.55 worth of pennies and nickels.

He has twice as many nickels as pennies.

Now, to determine the number of pennies and the number of nickels that Elijah has.

Let the number of nickels be x.

And the number of pennies be y.

As given that he has twice as many nickels as pennies.

2y=x

x=2y. ......(1)

The total worth of worth of pennies and nickels = $0.55.

As, the value of a penny = $0.01.

And the value of a nickel = $0.05.

Now, to get the number of pennies and the number of nickels that Elijah has:

0.05(x)+0.01(y)=0.55

Putting the value of x from equation (1):

0.05(2y)+0.01(y)=0.55

0.10y+0.01y=0.55

0.11y=0.55

<em>Dividing both sides by 0.11 we get:</em>

y=5.

<em>The number of pennies = 5.</em>

Now, putting the value of y in equation ( 1 ) we get:

x=2y\\x=2\times 5\\x=10.

<em>The number of nickels = 10.</em>

Therefore, the number of nickels are 10 and number of pennies are 5.

3 0
3 years ago
Over a period of 12 hours the temperature dropped 36 degrees Fahrenheit. What was the average change in temperature in one hour
Mama L [17]

Answer:

3 degrees

Step-by-step explanation:

36 degrees divided by the hours it took to drop that much will get you the answer

36/12 is 3

4 0
2 years ago
Which math expression means "the product of 16 and 26"?<br> 16 +26<br> O 16.26<br> 15 - 26<br> 26-16
Llana [10]

Answer:

The product of 16 and 26 would be 16 * 26

Step-by-step explanation:

This is because "the product of" means multiplication so *. Making it 16 * 26.

8 0
3 years ago
What is the Y 2(7y−1)=40
MissTica

Answer:

3

Step-by-step explanation:

2(7y−1)=40

14y-2=40

14y=40+2

14y=42

y=3

please mark as brainliest

5 0
2 years ago
Read 2 more answers
Find two consecutive numbers whose sum is 117
Serhud [2]
So,

x + y = 117
y = x + 1
x + x + 1 = 117

Collect Like Terms
2x + 1 = 117

Subtract 1 from both sides
2x = 116

Divide both sides by 2
x = 58

y = x + 1

y = 58 + 1

y = 59

The 2 consecutive integers are 58 and 59.
6 0
3 years ago
Read 2 more answers
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