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White raven [17]
3 years ago
9

Write a word problem involving fractions for which you would use the work backward strategy and addition to solve. Include solut

ion.
Mathematics
1 answer:
Delicious77 [7]3 years ago
7 0
Mrs. Annie went to a store, spent half of her money and then $10 more. She went to a second store, spent half of her remaining money and then $10 more. But she then had no money left. How much money did she have to begin with when she went to the first store?
Answer: $60
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How many ways can a committee chairman choose 4 people for a subcommittee if there are 12 members on the whole committee?
Marina86 [1]
A group of k elements can be chosen from a group of n elements in \frac{n!}{k!(n-k)!} ways.

(^{12} _4)=\frac{12!}{4!(12-4)!}=\frac{12!}{4! \times 8!}=\frac{8! \times 9 \times 10 \times 11 \times 12}{2 \times 3 \times 4 \times 8!}=\frac{9 \times 10 \times 11 \times 12}{2 \times 3 \times 4}= \\ \\
=3 \times 5 \times 11 \times 3=495

The answer is B. 495.
7 0
3 years ago
A field has 25 trees in it . 14 trees are new and the rest are old . How many trees are old ? Write two different equations that
mamaluj [8]

Answer:

An equation would be 24 - 14 = n. Another one you could write would be 14 + n = 24. The answer is 10 for the amount of old trees.

5 0
3 years ago
Liam is making chocolate chip cookies. The recipe calls for 1 cup of sugar for every 3 cups of flour. Liam only has 2 cups of fl
HACTEHA [7]

Answer:

2/3 cups of sugar

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
A regular decagon has a side length of 4 centimeters long if the decagon is divided into 10 congruent triangles each has an appr
ratelena [41]
Area of decagon is given by:
Area=1/2(nsr)
where:
n=number of sides
s=side length
r=height
thus the area will be given by:
Area=1/2(10*4*6.2)
Area=124 cm^2
4 0
3 years ago
PLEASE HELP!!!!!!!!!!!!!!!!!!!
Advocard [28]

Answer:

i believe the answer is a. There are no solutions to the system because the equations represent parallel lines.

Step-by-step explanation:

3 0
3 years ago
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