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padilas [110]
3 years ago
12

Is 3 - -80 positive or negative?

Mathematics
1 answer:
Darina [25.2K]3 years ago
6 0

3-(-80) is 83, so positive.

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Quadrilateral BCDE is inscribed inside a circle as shown below. Write a proof showing that angles C and E are supplementary.
erma4kov [3.2K]

Each of those angles are Inscribed angles. A useful fact is that the measure of the intercepted arc of an inscribed angle is twice the measure of the angle.

The intercepted arc of ∠C is arc BED. The intercepted arc of ∠E is arc BCD.

m(arc BED) + m(arc BCD) = 2( m∠C + m∠E)

The two arcs combined make u p the entire circle, so the sum of their measures is 360.

360 = 2(m∠C + m∠E)
180 = m∠C + m∠E

The angles are supplementary.

4 0
3 years ago
Which expression is not equivalent to 3 ∙ S ∙ R?<br><br> A. 3SR<br> B. 3RS<br> C. 3 + S + R
NARA [144]
If we take S=3, and R=2, then the answer is C, since 3*3*2 = 18, and 3+3+2 = 8, and 8 != 18
4 0
4 years ago
Read 2 more answers
HELPPP plssss pls pls
Kitty [74]

Answer:

∠C = 75°

Step-by-step explanation:

using the formula for the sum of interior mangles for a polygon:

total interior angles = (180° x 5 angles) - 360° = 540°

113° + 4x + 113° + 2x + 9° + 3x + 8° = 540°

combine like terms:

9x + 243° = 540°

9x = 297°

x = 33°

∠C = 2(33) + 9 = 75°

4 0
3 years ago
If 168 chocolate chips weigh 5 1 4 ounces. How many chocolate chips are in an ounce?
saw5 [17]

Answer:

if 168 chocolate chips weighs 514 ounces then you would divide

514/168=3.220238095

so round to the nearest tenth and get 3.2

you get that there are 3.2 chocolate chips are in one ounce

Step-by-step explanation:

hope this helps and plz give brainiest

6 0
4 years ago
Damon has 5 dimes and some nickels in his pocket worth a total of $1.20. To find the number of nickels Damon has, a student wrot
ki77a [65]
In the student's equation, there are many problems. Nickels are worth 5 cents, represented by .05, not 50 dollars. Also, the coeffient 5 should not be placed there, it belongs with 5(.1), as we already know how many dimes there are. If we were able to make a new one, it would be, 5(.1)+.05n=1.20.
4 0
3 years ago
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