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4 years ago

I do not understand this question I am confused!

Mathematics

2 answers:

Elza [17]4 years ago

8 0

The answer is H because shape three isn't equal so if you split it in half it wouldn't be symmetrical.

Darya [45]4 years ago

7 0

If you fold shape 3 I'm half according to the line it won't be equal. H is the answer

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HELP PLSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS

algol13

Answer:

x = −3+√14 or x=−3−√14 Hope this helps! Mark Me as bainlest

Step-by-step explanation:

7 0

2 years ago

Read 2 more answers

In 2012, the world population was 7.02 billion. The birth rate had stabilized to 134 million per year and is projected to remain

xeze [42]

Answer:

$(a)\ \frac{dP}{dt} = 0.078- 0.000857t$

$(b)\ P = 0.078t- 0.0004285t^2 + 7.02$

$(c)\ 9.37\ billion$

Step-by-step explanation:

Given

In 2012

$P(t) = 7.02\ billion$

$R_1 = 134\ million/year$ --- Birth rate

$R_2 = 56\ to\ 80$ -- Death rate from '12 to '40

Solving (a): Equation for population from 2012

In 2012, we have the addition in population to be:

$\triangle P= Birth - Death$

$\triangle P= 134 - 56$

$\triangle P = 78$ million

From 2012 to 2040, we have the death rate per year to be:

$Rate/yr = \frac{80 - 56}{2040 - 2012}$

$Rate/yr = \frac{24}{28}$

$Rate/yr = \frac{6}{7}$ million/year

So, the differential equation is:

$\frac{dP}{dt} = \triangle P - Rate/yr * t$ where t represents time

$\frac{dP}{dt} = 78 - \frac{6}{7} * t$

$\frac{dP}{dt} = 78 - \frac{6t}{7}$

Express in millions

$\frac{dP}{dt} = \frac{78}{1000} - \frac{6t}{7000}$

$\frac{dP}{dt} = 0.078- 0.000857t$

Solving (b): The solution to the equation in (a)

$\frac{dP}{dt} = 0.078- 0.000857t$

Make dP the subject

$dP = (0.078- 0.000857t)dt$

Integrate both sides

$\int dP = \int (0.078- 0.000857t)dt$

$P = \int (0.078- 0.000857t)dt$

This gives:

$P = 0.078t- \frac{0.000857t^2}{2} + c$

$P = 0.078t- 0.0004285t^2 + c$

Solve for c.

When t = 0; P = 7.02

So, we have:

$7.02 = 0.078*0- 0.0004285*0^2 + c$

$7.02 =0-0 + c$

$7.02 =c$

$c = 7.02$

So:

$P = 0.078t- 0.0004285t^2 + c$

$P = 0.078t- 0.0004285t^2 + 7.02$

Solving (c): The population in 2050

We have:

$P = 0.078t- 0.0004285t^2 + 7.02$

In 2050, the value of t is:

$t = 2050 - 2012$

$t = 38$

So, the expression becomes

$P = 0.078*38- 0.0004285*38^2 + 7.02$

$P \approx 9.37\ billion$

3 0

3 years ago

Solve kx + 8 = 4 for x.

AnnyKZ [126]

Answer:

A.4

hope it is ❤❤❤❤

THANK YOU.

4 0

3 years ago

HELP PLEASEEEE DUE TODAY

lianna [129]

Given:
Square DEFG = SIDE LENGTH = 2 UNITS
Square D'E'F'G' = SIDE LENGTH = 6 UNITS

The question was which scale factor was used to dilate square DEFG to square D'E'F'G'

From a side length of 2 units to a side length of 6 units

The scale factor used is 3.

2 * scale factor = 6
scale factor = 6/2
scale factor = 3

8 0

3 years ago

Jovita bought 3 1/3 cubic yards of mulch for the garden. She will need 2.5 cubic yards for the flowerbeds. How much mulch is lef

salantis [7]

1/3 = 0.333... (repeating)

-- Jovita bought 3.333 cubic yards.

-- She needs 2.5 cubic yards for the flowers.

-- The rest will be left for the veggies.
If she doesn't spill any, that will be

(3.333) minus (2.5) = 0.833... (repeating) cubic yards.

6 0

3 years ago