Answer:
a) 49
b) 84
c) (B) -- always odd
Step-by-step explanation:
We observe that the number of square tiles is the square of the pattern number. The number of circular tiles is 1 more than the pattern number on each side of the square.
square tiles = n²
circular tiles = 4(n +1)
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<h3>a) </h3>
7² = 49 square tiles are needed for pattern number 7.
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<h3>b)</h3>
4(20+1) = 84 circular tiles are needed for pattern number 20.
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<h3>c) </h3>
The parity of the number of square tiles matches the parity of the pattern number. (The square of a number has the same parity as the number.) Since 4 is a factor in the number of circular tiles, its parity is always even. The parity of the total number of tiles will match the parity of the pattern number.
When the pattern number is odd, the total number of tiles will always be odd. (B)
15 square feet because 1.25*3=3.75
3.75*4 = 15
Answer: y + 7 = (-7/4)(x - 4)
y + 7 = (-7/4)x + 7
y = (-7/4)x
Step-by-step explanation:
To solve this problem you must apply the proccedure shown below:
As you can see in the figure attached above, the figure has a semicircle and a rectangle, then, you have that the perimeter is:
P=(18x2)+15+(15/2)(3.14)
P=36+15+23.55
P=74.55
Therefore, as you can see, the answer for this exercise is the last option, the option d, which is: d. 74.55
Answer:
52°
Step-by-step explanation:
If it is a right triangle, one interior angle is 90°, and we are also given the interior angle of 38°. The sum of any triangles interior angles will always be 180°.
90 + 38 = 128
180 - 128 = 52
The third angle is 52°
