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3 years ago

Answers correct gets 10 points

Mathematics

1 answer:

Marina CMI [18]3 years ago

3 0

Answer:

Its been a few years since I've done proofs, but I think these answers are right

2. Line AX is congruent to Line BX

3. Definition of perpendicular

4. Angle PXA is congruent to Angle PXB

6. Triangle AXP is congruent to Triangle BXP

7. Line PA is congruent to Line PB

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3 years ago

Sixty more than nine times a number is 375

zmey [24]

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Step-by-step explanation:

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2 years ago

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2 years ago

A chemist would like to dilute a 90-cc solution that is 5% acid to one that is 3% acid. How much water must be added to accompli

Verizon [17]

Answer:

The amount of water must be added to this task = 60 $cm^{3}$

Step-by-step explanation:

Let amount of water added = x $cm^{3}$

Then from the given conditions

A chemist would like to dilute a 90-cc solution that is 5% acid to one that is 3% acid. So

90 (0.05) = 0.03 ( 90 + x )

4.5 = 2.7 + 0.03 x

0.03 x = 1.8

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3 years ago

1 + 5sin^2x= 7sin^2x solve trig equation. Can you show me how to solve this trig equation?

pantera1 [17]

Answer: $x = \frac{\pi}{4}\pm k\frac{\pi}{2}\,\,\,\,\,\,k=\{0,1,2,...\}$

Step by step:

$1 + 5\sin^2x= 7\sin^2x\\\sin^2 x\rightarrow z\\1 + 5z = 7z\\2z = 1\\z = \frac{1}{2}\implies \sin^2 x = \frac{1}{2}\\|\sin x| = \frac{1}{\sqrt{2}}\\\sin x = \pm\frac{1}{\sqrt{2}}=\pm\frac{\sqrt{2}}{2}\\\implies x = \frac{\pi}{4}\pm k\frac{\pi}{2}\,\,\,\,\,\,k=\{0,1,2,...\}$

(Used a table of common angles)

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3 years ago