Answer:
The rectangle is 10 cm by 18 cm.
Step-by-step explanation:
Let x represent the distance from the center of the rectangle to the longer side. Then the distance to the shorter side is x+4. The short side of the rectangle will have length 2x, and the long side will have length 2(x+4) = 2x+8.
The perimeter is twice the sum of the side lengths, so is ...
56 = 2(2x +(2x+8)) = 8x +16
40 = 8x . . . . . . . subtract 16
40/8 = x = 5 . . . divide by the coefficient of x
The side lengths are 2x=10 and 2x+8 = 18 centimeters.
Answer:
The answer is 63.5
Step-by-step explanation:
9.3(3)+8.9(4)
= 27.9 + 35.6
= 63.5
Answer:-60/49
Step-by-step explanation:
Answer:
23
Step-by-step explanation:
The question gives the first equation:
0.05N + 0.10D = 2.20
It can be rewritten as:
0.05$ times the number of nickels plus 0.10$ times the number of dimes is equivalent to $2.20.
Notice that 0.05$ or 5 cents is equivalent to one nickel and 0.10$ or 10 cents is equivalent to one dime.
The question asks for N+D. We know that N stands for the number of nickels Daniel has and D stands for the number of dimes Daniel has. We also know that Daniel <u>only</u> has dimes and nickels in his pocket. Therefore N+D most be equivalent to the <u>total number of coins</u>, which is given in the question to be equal to 23 coins.
Therefore...
N+D = 23