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julsineya [31]
3 years ago
9

Im so confused pls help

Mathematics
1 answer:
timama [110]3 years ago
5 0
Answer:

a = 49°

Explanation:

You use the rule ‘exterior angle of a triangle’ which states that the exterior angle is equal to the sum of the two opposite interior angles.

To put it mathematically:

a + a = a + 49° (Ext angles of triangle)
a = a - a + 49°
a = 49°
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A new cell phone was $625 but it was reduced to $500. What was the percent of decrease?
zepelin [54]

Answer:

80%

Step-by-step explanation:

To find percent decrease (new amount/original amount)*100

(500/625)*100

=80

--

to check

625*.80  

=500

or

625*80%

=500

4 0
3 years ago
Read 2 more answers
How do I do this question? Please Help!
AURORKA [14]

Answer:

2x+50 and 5x-55 both are congruent or have same measure.

Step-by-step explanation:

Since we want to prove that both lines are parallel, this means no theorems that involve with parallel lines apply here.

First of, we know that AC is a straight line and has a measure as 180° via straight angle.

x+25 and 2x+50 are supplementary which means they both add up to 180°.

Sum of two measures form a straight line which has 180°.

Therefore:-

x+25+2x+50=180

Combine like terms:-

3x+75=180

Subtract 75 both sides:-

3x+75-75=180-75

3x=105

Divide both sides by 3.

x=35°

Thus, x = 35°

Then we substitute x = 35 in every angles/measures.

x+25 = 35°+25° = 60°

2x+50 = 2(35°)+50° = 70°+50° = 120°

5x-55 = 5(35°)-55 = 175°-55° = 120°

Since 2x+50 and 5x-55 have same measure or are congruent, this proves that both lines are parallel.

5 0
3 years ago
Read 2 more answers
Please Help! it's simple!
ss7ja [257]

Answer:

28.27

circumference of finding a circle divided by two.

(2\pi \:r {}^{2} ) \div 2

(2×3.14×9)/2

56.55/2

28.27

8 0
2 years ago
What is the volume of the prism?​
cluponka [151]

Answer: 90 ft cubed

Step-by-step explanation:  Multiply the height, width, and depth. So, 3*5=15. 15*6=90.

3 0
3 years ago
What is an equation that represents a non proportional relationship???
Dvinal [7]
When b does not equal 0 it’s a non proportional relationship
y=mx+b
8 0
3 years ago
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