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miv72 [106K]
3 years ago
8

True or Fasle

Mathematics
1 answer:
Mnenie [13.5K]3 years ago
5 0

1. True.

2. False. x² + 4 = (x+2)(x-2)

3. True.

4. False. It gives (x²-9) which is a binomial.

<em>Feel free to mark this as brainliest! :D</em>

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3 years ago
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4. What is the measure of each interior angle of a regular 28-gon?
melomori [17]

Step-by-step explanation:

Measure of each interior angle of 28 sided polygon

\frac{(28 - 2) \times 180 \degree}{28}  \\   \\  =  \frac{26 \times 180 \degree  }{28}  \\  \\ =  \frac{4680 \degree  }{28}  \\  \\  = 167.14\degree \\

8 0
3 years ago
I don’t understand this I would like some help plz!!!
Andrew [12]

So basically, these questions want you to find the variable<em> x</em>, which you can do by isolating the variable.


3) x * 1/2 = 1/3 <-- To isolate the x in this case, you want to divide both sides by 1/2, aka multiply by 2.

x = 2/3


4) x * 3 = 2 <-- To isolate x, you want to divide both sides by 3

x = 2/3


5) 1/4 * x = 1/6 <-- To isolate x, you want to divide both sides by 1/4, aka multiply by 4.

x = 4/6 = 2/3


6) 4 1/2 * x = 1 1/2 <-- First, let's make these into improper fractions

9/2 * x = 3/2 <-- To isolate x, you want to divide both sides by 9/2, or multiply both sides by 2/9

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8 0
3 years ago
What is the answer to this in cm
jasenka [17]
The hardest part is finding the length of the curve at the top. To find arc length, multiply the circumference by the arc angle divided by full angle (360°) in a circle. Or:
s = (2\pi  r)( \frac{x}{360})
x, the arc angle in a semicircle, is 180°.
r, the radius is 7/2 = 3.5.
Now just plug the numbers in and solve for arc length, s.

s = 2π(3.5)(1/2) ≈ 11.00

Now just add up all the sides. 11cm + 10cm + 10cm + 7cm = 38 cm.
5 0
3 years ago
What is the sum of 3/4 and 18/19 closest to 0 1 or
weeeeeb [17]
To solve this, you must find a common denominator (the number on the bottom of the fraction) before adding the numbers. The easiest was to do this is multiply the denominators together to get a common product. You then multiply by that number over itself, because that is equivalent to 1. So in this problem, you would multiply 3/4 by 19/19 and 18/19 by 4/4. Once you do this, you can add the fractions together.
8 0
3 years ago
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