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3 years ago

Help.. Suppose Q is the midpoint of PR

Mathematics

1 answer:

8090 [49]3 years ago

6 0

Answer:

$3x+41$ or 38

Step-by-step explanation:

If Q is the midpoint of Line PR, then lines PQ and QR add up to equal Line PR. We then get

$PQ=6x+25\\QR=16-3x\\PQ+QR=PR\\6x+25+16-3x=PR\\3x+41=PR\\$

If you want to know the exact number that PR is, we can do additional steps where PQ = QR.

$PQ=6x+25\\QR=16-3x\\PQ=QR\\6x+25=16-3x\\9x+25=16\\9x=-9\\x=-1\\\\3x+41=PR\\3(-1)+41=PR\\-3+41=PR\\38=PR\\PR=38$

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4 years ago

Read 2 more answers

76 cm a 52 cm Find the area of the regular pentagon (the answer has one digit after the decimal point)

alekssr [168]

Answer:

98.8 cm²

Step-by-step explanation:

Hi there!

$A=\frac{1}{2} Pa$ where P is the perimeter of the pentagon and a is the apothem (the line going from the center of the pentagon one edge)

<u>1) Find the perimeter</u>

$P=5l$ where l is the side length

Plug in the side length 7.6 cm

$P=5(7.6)\\P=38$

Therefore, the perimeter of the pentagon is 38 cm.

$A=\frac{1}{2} Pa$

Plug in the perimeter (38) and the apothem (5.2)

$A=\frac{1}{2} (38)(5.2)\\A=\frac{1}{2} (38)(5.2)\\A=\frac{1}{2} (197.6)\\A=98.8$

Therefore, the area of the pentagon is 98.8 cm².

I hope this helps!

5 0

3 years ago

Find the slope of the line tangent to the curve y equals x squaredy=x2 at the point left parenthesis negative 0.7 comma 0.49 rig

dlinn [17]

Answer:

Slope: -1.4

y = -1.4x - 0.49

Step-by-step explanation:

Slope: dy/dx = 2x

x = -0.7

dy/dx = -1.4

Equation of tangent:

y = mx + c

y = -1.4x + c

When x = -0.7, y = 0.49

0.49 = (-1.4)(-0.7) + c

c = -0.49

y = -1.4x - 0.49

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3 years ago

What is equivalent of 2/7

natita [175]

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