Hi, can someone help me understand how to do this.I tried and I got confused and I was confident my answers were right but I got them wrong.These problems have to do with Quadratic applications I believe.

Answer:

100 fiddler crabs

Step-by-step explanation:

If the 30 crabs are a representation of the entire population, then 6 marked crabs in a population of 30 would mean that

6 / 30 = 0.20 or 20%

20% of the entire crab population are marked. Since we know that a total of 20 fiddler crabs are marked in the pond then we can divide this number of marked crabs by 20% in decimal form to get the estimated total size of the fiddler crab population

20 / 0.20 = 100 fiddler crabs

Answer:

Step-by-step explanation:

20 + g = 25

-20        -20

        g = 5

Answer:

[tex]\frac{4}{5} .\frac{4}{5} .\frac{4}{5} =\frac{64}{125}[/tex]

Step-by-step explanation:

An "exponential form" is being used for "repeated multiplication." The value of [tex](\frac{4}{5} )^3[/tex] is equal to [tex]\frac{4}{5}[/tex] being repeatedly multiplied by itself.

Choice A is incorrect because it is an addition of fraction and also an incorrect way of adding the numerators. Choice C is also incorrect because it also used the addition operation. Choice D is incorrect because it repeatedly multiplied the reciprocal of [tex]\frac{4}{5}[/tex], which is [tex]\frac{5}{4}[/tex], instead of the fraction itself.

A section, or cross-section, is a view of a 3-dimensional object from the position of a plane through the object. A section is a common method of depicting the internal arrangement of a 3-dimensional object in two dimensions. It is often used in technical drawing and is traditionally crosshatched.

Cross sections of three-dimensional objects are two-dimensional shapes of various sizes. They may be parallel to a side or base of the object or at an angle to these surfaces. A cross section may resemble the shape of the object’s side or base, or it may have a completely different shape.

Answer:

4.875?

convert it into an improper fraction

4 7/8 in decimal form is equal to 4.875.

To convert the mixed number 4 7/8 into decimal form, we need to add the whole number part to the fraction part.

The whole number part is 4.

To convert the fraction 7/8 into decimal form, divide the numerator (7) by the denominator (8):

= 7 ÷ 8

= 0.875

Now, add the decimal result to the whole number:

= 4 + 0.875

= 4.875

Therefore, 4 7/8 in decimal form is equal to 4.875.

Learn more about Decimal here:

https://brainly.com/question/238739

#SPJ6

Answer:

Step-by-step explanation:

just add 36 and 3

Answer:

$168

Step-by-step explanation:

Answer:

$168

Discount amount: $112

Step-by-step explanation:

s = l - d/100 * l

s = 280 = 40%/100 * 280

s = 280 - 0.40 * 280

s = 280 - 112

s = 168

9514 1404 393

Answer:

  y = 6·2^x

Step-by-step explanation:

The general form can be written as ...

  y = a·b^x

The value of 'a' is the value of y when x=0. That is 6.

The value of 'b' is the ratio of y-values when x differs by 1. b = 12/6 = 2.

So, the equation of interest is ...

  y = 6·2^x

9514 1404 393

Answer:

  a) 102.4

  b) 72.6

  c) 87.5

Step-by-step explanation:

The average value of a function over an interval is the integral of that function over the interval, divided by the width of the interval.

(a) The summer average is ...

  [tex]\text{summer average}=\displaystyle\dfrac{1}{(\frac{1}{4})}\int_\frac{1}{2}^\frac{3}{4}{T(x)}}\,dx=87.5+23.4\cdot\dfrac{2}{\pi}\approx 102.4[/tex]

__

(b) The winter average is similar:

  [tex]\text{winter average}=87.5-23.4\cdot\dfrac{2}{\pi}\approx 72.6[/tex]

__

(c) The annual average is the value added to the cosine function: 87.5

_____

Additional comment

The integral of the cosine function over the period of interest is ...

  ∫cos(2πx)dx = 1/(2π)sin(2πx)

For the limits x=1/2 and x=3/4, this becomes 1/(2π)(-1 -0) = -1/(2π).

When multiplied by -23.4(1/(1/4)), we get +23.4(2/π).

Answer:

39/8

Step-by-step explanation:

Answer:

(x+3)(x+2)

Step-by-step explanation:

Given the quadratic equation x²+5x + 6

Factorize

x²+2x+3x+6 = 0

x(x+3)+3(x+2) = 0

(x+3)(x+2)

Hence the factored form is (x+3)(x+2)

Rose was incorrect because she uses the wrong factors

Answer:

there is a 40% or a 16/40 chance the the student will receive blue chalk

Step-by-step explanation:

Answer:

48.26

Step-by-step explanation:

subtract  and thats the answer its 48.26 less than the belt

Answer:

55% or 27.2 ounces

Answer:

100 meters is 8.6 meters longer than 100 yards.

Step-by-step explanation:

Conversion of yards to meters.

Each yard has 0.914 meters.

So 100 yards is 100*0.9144 = 91.4 meters.

How many meters longer to the nearest tenth is 100 meters than 100 yards?

100 yards = 91.4 meters

100 - 91.4 = 8.6

So 100 meters is 8.6 meters longer than 100 yards.

Answer:

x=-4

Step-by-step explanation:

Cross multiply to get:

3x=4(x+1)

3x=4(x+1)

3x=4x+4

x=-4

Answer:

x=-4

Step-by-step explanation:

cross multiply you get 3x=4x+4. solve algebraically you get x=-4

Answer:

dog

Step-by-step explanation:

Answer:

The answer is b. h(x) = one-halfx – one-half

Step-by-step explanation:

Answer:

hey everyone its b!!!

Step-by-step explanation:

Answer:

y=12.73 x=9

Step-by-step explanation:

Answer:

Gordon types at 76 wpm

Step-by-step explanation:

You can find this by dividing the number of words typed by the number of minutes:

[tex]\frac{3572w}{47m}\\\\= \frac{3572}{47}\frac{w}{m}\\\\= 76\frac{w}{m}\\\\[/tex]

Answer:

78 Words per minute

Step-by-step explanation:

Unit Rate = 3666 Words in 47 minutes

Unit Rate = 78 Words per minute

Answer:

Service is being an active helper in the community and taking action that can be of benefit.

Service comes from citizens who care and accept their responsibility.

Use those

C. or D is the answer I think its D

maybe.

Answer

sonu's age=16years

mothers age=44years

Step-by-step explanation:

sonu's age be x

then, mothers age will become 2x+12

after 8years,

sonu's age=x+8

mother's=2x+12+8

a/q

3(x+8)-20=2x+12+8

3x+24-20=2x+20

3x+4=2x+20

3x-2x=20-4

x=16

sonu's age=16years

mothers age=44years

Answer:

.375

Step-by-step explanation:

To find the batting average, do 15/40. And 15/40=.375

Answer:

0.25 hours

Step-by-step explanation:

The equation for a linear function is given by:

y = mx + b,

where y and x are variables, m is the rate of change of y with respect to x and b is the initial value of y (value of y when x = 0).

Let x represent the number of hours after 1:00 P.M and let y represent the temperature in degree Fahrenheit.

Let us assume that initial the temperature is 0°F. The temperature changes -4 degrees Fahrenheit per hour. From the equation of a linear function y = mx + b:

m = -4 degrees Fahrenheit per hour, b = 0. Hence:

y = -4x

The time taken to reach -1°F is gotten by substituting y = -1 and finding x:

y = -4x

substituting:

-1 = -4x

x = -1 / -4

x = 0.25 hours

0.25 hours = 0.25 hours * 60 minute / 1 hour = 15 minute

Therefore at 1:15 P.M, the temperature is -1°F