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jarptica [38.1K]
3 years ago
5

Hey guys, I need your help again!! This is confusing me.

Mathematics
2 answers:
victus00 [196]3 years ago
3 0
x^2-18x+81=(x-9)^2=(x-9)(x-9)

So it's A.

belka [17]3 years ago
3 0
(x - 9)(x + 9) is incorrect answer

Correct:
x^2 - 18x + 81
= (x - 9)^2
= (x - 9)(x - 9)

Answer
A. The answer is incorrect; the plus sign should be a minus sign.
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Guys!! anyone can help me solve this geometry problem?<br>What is the area of this triangle?
NeX [460]

Answer:

10657.5

Step-by-step explanation:

<h2>Long way that is unnecessarily long</h2>

We can start by finding the area of the larger triangle. Using the Pythagorean theorem, we can say that 251²-105²=the bottom side², and  251²-105²=51976, so the bottom side of the larger triangle is √51976 , or approximately 228. Then, the area of the larger triangle is √51976 * 105/2 = 11969 (approximately). Then, the area of the smallest triangle (the largest triangle - the one that we're trying to find the area of) is 105*(√51976-203)/2 = approximately 1312. Then, subtracting that from the total area, we get (√51976 * 105 -  105*(√51976-203))/2 = 105*203/2 = 10657.5

<h2>Short way</h2>

ALTERNATIVELY, upon further review, we can just see that the height is 105 and the base is 203, so we multiply those two and divide by 2, as is the formula for the area of a triangle, to get 10657.5

3 0
3 years ago
A car is traveling at 55 mi/hour. What is the cars speed in feet per second
Shalnov [3]

Answer:

<em>80.7 ft/sec</em>

Step-by-step explanation:

You need two conversion factors:

1 mile = 5280 ft, so (52780 ft)/(1 mile) = 1

1 hour = 3600 seconds, so (1 hour)/(3600 seconds) = 1

55 mi/hour * (5280 ft)/(1 mile) * (1 hour)/(3600 seconds) = 80.6666... ft/sec

Answer: 80.7 ft/sec

6 0
3 years ago
Read 2 more answers
1/2 is less or greater than 5/4
nalin [4]

Answer:

Step-by-step explanation:

1/2 is definitely less than 5/4.  Try comparing

0.5 and 1.25; 0.5 is definitely less than 1.25.

Next time, please include all of the instructions.

7 0
4 years ago
Read 2 more answers
2 + 2= ?<br><br> Just answer this if ur bored
Galina-37 [17]

Answer:

4

Step-by-step explanation:

break the first 2 into its components, 1 and 1 because 1 + 1 = 2.
Break the second 2 into its components, 1 and 1 because 1 + 1 = 2.

Combine all the components. Since they're all ones, you just have to count your fingers 4 times!
1 + 1 = 2. 2 + 1 = 3. 3 + 1 = 4!
1 + 1 + 1 + 1 = 4!

4 is the correct answer.

5 0
3 years ago
Bob's bill for dinner at a restaurant is $37.80. If he wants to leave a 15% tip, which best represents a reasonable amount for t
Mariana [72]

Multiply the amount of the bill by 15%:

37.80 x 0.15 = 5.67

A 15%  tip would be $5.67

8 0
4 years ago
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