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dimaraw [331]
3 years ago
11

In a population of 271 Dd parrots, predators kill 55. What is the approximate fitness of the genotype?

Mathematics
1 answer:
MissTica3 years ago
7 0

Answer:

60%

Step-by-step explanation:

well i domt really know how to explain it ngl

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Riley and Erik have earned a total of 135 tokens to buy items in the school store. The ratio of the number of tokens that Riley
lisabon 2012 [21]

Answer:

<em>Riley has 72 tokens</em>

Step-by-step explanation:

<u>System of Equations </u>

We have two conditions for the tokens Riley and Erik have earned. Let's call x and y to the number of tokens of Riley and Erik respectively. The first condition states that

x+y=135

Solving for y

y=135-x

The second condition is that the ratio of the number of tokens that Riley had to the number of tokens that Erik has is 8 to 7. It's written as

\displaystyle \frac{x}{y}=\frac{8}{7}

Or equivalently

7x=8y

Replacing y from the first equation

7x=8(135-x)

Operating

7x=1080-8x

Simplifying

15x=1080

\boxed{x=72}

Riley has 72 tokens

3 0
3 years ago
Need help on question 8 asap
s344n2d4d5 [400]
A) 8 chocolate chip cookies

B) The ratio of sugar to oatmeal is 2:3 because there are 12 sugar and 18 oatmeal. 12/18 simplified is 2/3.
6 0
3 years ago
On a blueprint, the scale indicates that 4 centimeters
makvit [3.9K]

Answer:

Length: 15 feet Width: 105 feet

Step-by-step explanation:

set up a proportion of x over 4 and x over 12 fill in the length or width that you do know. Then cross multiply and solve the simple equation you get: for example) 60 = 4x. Just divide both sides by 4 to get x by itself.

Hope this answered your question!

6 0
3 years ago
PLEASE HELP ITS MATH
xxMikexx [17]

Answer:

y=[-4]x+[10]

Step-by-step explanation:

For a line to be perpendicular to another it must have the reverse reciprocal of the opposite line, to find the reverse reciprocal you take your slope, flip the numerator and denominator, and multiply it by -1.

The slope \frac{1}{4} turns into \frac{4}{1} and is then multiplied by -1 to become \frac{-4}{1} which can be simplified down to: -4

Now that we know the slope we need the line to pass through a point, so we will use point slope form:

y-y1=m(x-x1)
Substitute in our slope and point values:

y-2=-4(x-2)

Now solve for y:

y-2=-4(x-2)\\y-2=-4x+8\\y=-4x+10

Then you will find that line y=-4x+10 runs perpendicular to y=\frac{1}{4}x-8 and intersects point (2,2).

3 0
2 years ago
Factorise: (3x - 1/2 y + 1/3 z)^2​
Rufina [12.5K]

Given:

(3x - \frac{1}{2} y + \frac{1}{3} z)^{2}

Taking the LCM as 6,

( \frac{1}{6} (18x−3y+2z))^{2}

Applying the product rule to \frac{1}{6} (18x−3y+2z)^{2}:-

=  > ( \frac{1}{6})^{2} (18x−3y+2z)^{2}

Now applying the product rule to 1/6:-

\frac{1^{2} }{ {6}^{2} }(18x - 3y + 2z)^{2}

Hence, the answer.

7 0
2 years ago
Read 2 more answers
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