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aleksandrvk [35]
1 year ago
14

A freshwater stream flows into the ocean, as shown in the diagram. Which statement correctly describes how the stream affects th

e salinity of the ocean?Salinity increases because the stream adds salt to the ocean.Salinity decreases because the stream adds freshwater to the ocean.Salinity increases because the stream adds freshwater to the ocean.Salinity remains the same because the steam adds freshwater to the ocean.
Mathematics
1 answer:
gizmo_the_mogwai [7]1 year ago
8 0
I can't see any diagram but the correct statement should be:
"Salinity decreases because the stream adds freshwater to the ocean"

The other statements are false.
F Salinity increases because the stream adds salt to the ocean
T Salinity decreases because the stream adds freshwater to the ocean
F Salinity increases because the stream adds freshwater to the ocean
F Salinity remains the same because the steam adds freshwater to the ocean

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In isosceles △ABC (AC = BC) with base angle 30° CD is a median. How long is the leg of △ABC, if sum of the perimeters of △ACD an
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Note necessary facts about isosceles triangle ABC:

  • The median CD drawn to the base AB is also an altitude to tha base in isosceles triangle (CD⊥AB). This gives you that triangles ACD and BCD are congruent right triangles with hypotenuses AC and BC, respectively.
  • The legs AB and BC of isosceles triangle ABC are congruent, AC=BC.
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1. Consider right triangle ACD. The adjacent angle to the leg AD is 30°, so the hypotenuse AC is twice the opposite leg CD to the angle A.

AC=2CD.

2. Consider right triangle BCD. The adjacent angle to the leg BD is 30°, so the hypotenuse BC is twice the opposite leg CD to the angle B.

BC=2CD.

3. Find the perimeters of triangles ACD, BCD and ABC:

P_{ACD}=AC+CD+AD=2CD+CD+AD=3CD+AD;

P_{BCD}=BC+CD+BD=2CD+CD+AD=3CD+AD;

P_{ABC}=AC+BC+AB=2CD+2CD+AD+BD=4CD+2AD.

4.  If sum of the perimeters of △ACD and △BCD is 20 cm more than the perimeter of △ABC, then

P_{ACD}+P_{BCD}=P_{ABC}+20,\\ \\3CD+AD+3CD+AD=4CD+2AD+20,\\ \\6CD+2AD=4CD+2AD+20,\\ \\2CD=20.

5. Since AC=BC=2CD, then the legs AC and BC of isosceles triangles have length 20 cm.

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Answer:

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Step-by-step explanation:

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"An adult Welsh Corgi is always going to be shorter than an adult Basset Hound."

"Basset hounds tend to be a little over two inches taller than Welsh Corgis, but have a higher variability in height.

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