4 years ago

Help me with these questions

Biology

2 answers:

ANTONII [103]4 years ago

5 0

The object is about to go/going down a hill, its increasing. b

solniwko [45]4 years ago

5 0

The answer is the last one

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Brut [27]

Answer:

hmm thats a hard one

Explanation:

tbh tbh tbht b

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3 years ago

What virus can infects only cats

anastassius [24]

Answer:

Feline Immunodeficiency Virus

Explanation:

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3 years ago

How has the Douglas-fir adapted to enable its survival in the taiga biome?

-Dominant- [34]

<span>How has the Douglas-fir adapted to enable its survival in the taiga biome?
a.
low growing
b.
perennial
c.
waxy needles<=====
d.
survive on limited nutrients</span>

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3 years ago

Read 2 more answers

Choose the definition of: invertebrates

slega [8]

<span>Invertebrates means having no backbone.</span>

7 0

3 years ago

A pharmacist has two vitamin-supplement powders. The first powder is 10% vitamin B1 and 30% vitamin B2. The second is 15% vitami

Basile [38]

Answer:

$560$ mg of powder 1 and $160$ mg of powder 2

Explanation:

Let "X" denotes weight of powder 1 added to the new mixture and "Y" denotes weight of powder 2 added to the new mixture

Total weight of vitamin B1 in the mixture is equal to $80$ mg

Total weight of vitamin B2 in the mixture is equal to $200$ mg

Equation 1

$0.1 X + 0.15 Y= 80$

Equation 2

$0.3 X + 0.2 Y= 200$

Let us simplify the above two equations, we will get

$10 X + 15 Y = 8000\\3X + 2Y = 2000$

$2 (10 X + 15 Y = 8000), 20X + 30 Y = 1600015(3X + 2Y = 2000), 45X +30Y = 30000\\25 X = 14000\\X = 560$

Substituting value of X in equation 2 we get

$0.3 * 560 + 0.2 Y = 200\\0.2 Y = 200 - 168\\Y = 160$

7 0

3 years ago