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3 years ago

Help me..........only 23...

Mathematics

1 answer:

Sphinxa [80]3 years ago

7 0

Question 23

Recall that a kite in geometry is any four sided figure where we have two different pairs of adjacent sides that are the same length.

We're told that PS = 4.5 and RS = 6. So this isn't an adjacent pair of congruent sides. But we can say that PS and PQ are one pair of adjacent congruent sides. That makes PQ to be 4.5 cm long.

Similarly, RS = RQ = 6 is the other pair of adjacent congruent sides. Notice that triangle PQR reflects over line PR to get triangle PSR.

See the diagram below.

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I need help with angles and the measure of them i have abc a is 65 and b is (3x-10) and c is (2x) find the value of x

Leona [35]

<h3>Answer: x = 25</h3>

Explanation:

The rule is that for any triangle, the three angles always add to 180 degrees

So A+B+C = 180

Replace A with 65, replace B with 3x-10 and replace C with 2x to get this new updated equation: 65 + 3x-10 + 2x = 180

Now let's isolate x

65 + 3x - 10 + 2x = 180

5x + 55 = 180 .................... combine like terms

5x + 55 - 55 = 180 - 55 ..... subtract 55 from both sides

5x = 125

5x/5 = 125/5 ..................... divide both sides by 5

x = 25

We can stop here since your teacher only wants to know the value of x.

-----------

If you're curious how to find the other angles, then replace x with 25 and compute

Angle B = 3x - 10 = 3*25 - 10 = 75 - 10 = 65 degrees

Angle C = 2*x = 2*25 = 50 degrees

Therefore, the three angles of the triangle are A = 65, B = 65, C = 50. As a check, they should add to 180. It turns out they do since A+B+C = 65+65+50 = 130 + 50 = 180. Therefore, the answer is confirmed.

note: since angles A and B are both the same at 65 degrees, this means the triangle is isosceles (the sides opposite the congruent angles are congruent sides). We do not have enough info to actually find the length of any of the three sides.

6 0

4 years ago

Read 2 more answers

I need help please someone help

dybincka [34]

The answer is 14.
(7x+25)+(3x+15)=180
x=14

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3 years ago

The figure is the net for a rectangular prism.

insens350 [35]

Answer:

surface area = 544 cm²

Step-by-step explanation:

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3 years ago

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Zarrin [17]

Answer:

Step-by-step explanation:

Probability is the possibility for an event to occur or not to occur.

The formula for a combination is:

n choose r = n! / (r! x (n-r)!)

Given

n=14

r= 11 to 13

Hence, we shall add up the cases for 11 through 13.

nCr

14C11 + 14C12 + 14C13

14!/11!(14-11)! + 14!/12(14-12)! + 14!/13(14-13)!

= 14!/11!•3! + 14!/12!•2! + 14!/13!•1!

= 14*13*12*11!/11!•(3*2*1) + 14*13*12!/12!•(2*1) + 14*13!/13!•(1*1)

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plss help asap Around which line would the following cross-section need to be revolved to create a sphere? circle on a coordinat

Dmitriy789 [7]

Answer:

The correct option is;

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The parameters given are;

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To form a spherical shape by the rotation of a circular figure involves rotating the circular figure about a line passing through the center of the circle

Therefore, to form a sphere, the circle should be about a line that passes through x = 1

Hence, the circle should be rotated about the line x = 1.

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4 years ago

Help me..........only 23...​

Help me..........only 23...