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Svetach [21]
3 years ago
12

Which expressions are differences of squares? Select each correct answer.

Mathematics
2 answers:
Temka [501]3 years ago
8 0

Answer:

First two are difference in squares.

  • 81=9^2
  • 225=15^2
Alex_Xolod [135]3 years ago
7 0

Answer:

The expression which denotes the differences of squares is

n² - 225

As here 225 is a square of 15.

Hope it will help :)❤

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How would you write the expression 35 times the difference of j and 14
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Answer:

35(j - 14)

Step-by-step explanation:

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3 0
2 years ago
A ramp is being constructed with wood and then filled with concrete. How many cubic get of concrete will be needed to complete t
Molodets [167]

Answer:

The cubic volume of concrete needed to complete the ramp is 360 ft³

Step-by-step explanation:

We note that the ramp shape is that of a right ngled triangular cube with dimensions

Height = 10 ft

Base = 12 ft

Width = 6 ft

The amount of concrete to fill the ramp is approximately the volume of the ramp.

Volume of ramp = volume of triangular prism = 0.5×Base ×Height  × Width

Volume of ramp = 0.5×12×10×6 = 360 ft³.

The cubic volume of concrete needed to complete the ramp = 360 ft³.

8 0
3 years ago
Rewrite the expression using words.<br>3/4 x (2 2/5 - 5/6)​
Dmitry_Shevchenko [17]

Answer:

2.675 or 107/40

Step-by-step explanation:

  1. 3/4 x (2 2/5 - 5/6)
  2. 3/4×107/30
  3. 107/40

6 0
2 years ago
Tammy has begun an exercise program. She worked out five days the first week for 28 minutes, 32 minutes, 21 minutes, 38 minutes
Luba_88 [7]
28 rounds up to 30.
32 rounds down to 30.
21 rounds down to 20.
38 rounds up to 40.
42 rounds down to 40.
30 + 30 + 20 + 40 + 40 = 160

Answer: C. 160 min
5 0
3 years ago
Read 2 more answers
What is the best estimate of the product 289 and 7?
liraira [26]
The best estimate would be (300×7)=2100
5 0
3 years ago
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