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zzz [600]
3 years ago
15

Annie buys some greeting cards. Each card costs $1.75. She pays with a twenty dollar bill.

Mathematics
1 answer:
zaharov [31]3 years ago
7 0

Answer:

Step-by-step explanation:

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I need help on 19 and 20
svp [43]
Number 19 you are comparing one measurement to another. Since it says 1/2 inch equals 4 ft, we want to find out how many more inches are needed if the given scale was 2/3 = 4 ft. Now lets find a common denominator for both scales stated in inches. We have 2/3 inch and 1/2 inch. Our denominator are the bottom parts of the fraction where we need to find a common factor for the denominator so we can add or subtract fractions. We have a 3 and a 2. You may always use the multiplication between two denominators to find a common factor such as 3 times 2 which equals 6 for both denominators. Now we multiplied the 3 by 2 to get 6 so the top part (numerator needs to be multiplied the the 2 because we changed the bottom part by 2 as well. You should notice that when you reduce your fraction now 4/6 is 2/3. Just a self check example there. As for 1/2 we multiplied a 3 to get 6 for the denominator so we need to multiply the numerator by 3 as well. You now should have 4/6 and 3/6. Since the question asks for how many more inches we need to subtract 4/6 from 3/6 and we get 1/6 inch for our answer.
8 0
3 years ago
the number of the students of a school was 640 last year and it is 800 by how many percent is the number increased​
yuradex [85]

Answer:

The number of students would have increased by 25%.

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
Which represents the solution(s) of the system of equations, y = -x2 + 6x + 16 and y = - 4x + 37? Determine the solution set
AysviL [449]

Answer:

The answer is c

Step-by-step explanation:

(7,9) (3,25)

3 0
3 years ago
If you know the number of yards for a measurement, you can change that measure to
otez555 [7]

Answer:

f(x) = 0.9144x

Step-by-step explanation:

To convert 3 yards to meters by multiplying 3*0.9144 = 2.7432 meters. This can be done for any number of yards x by writing f(x) = 0.9144x.

7 0
4 years ago
Hey guys help me with this question plzzzzzz​
Ad libitum [116K]

Answer:

625 cm³ and 64000 cm³

Step-by-step explanation:

Given

x = \sqrt[3]{V} ( cube both sides )

x³ = V

(a)

x = 25 cm , then

V = 25³ = 625 cm³

(b)

x = 40 cm , then

V = 40³ = 64 000 cm³

5 0
3 years ago
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