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3 years ago

7x +4(2-6) PLEASE HELP ME I'm really desperate

Mathematics

2 answers:

Margarita [4]3 years ago

5 0

We can use distribution property or whatever it's called:

7x + 4(2-6)

7x + 8 - 24.

7x -16

vekshin13 years ago

5 0

I don’t really know but your gay

Step-by-step explanation:

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Area of a circle is 80 cm². Work out the circumference of the circle.

GuDViN [60]

Answer:

The circumference of circle is: 31.714 cm

Step-by-step explanation:

Let C be the circumference of the circle

And A be the area of circle

It is given that:

$A = 80cm^2$

We have to find the radius first so that it can be used to find the circumference

The area of circle is given by the formula:

$A = \pi r^2$

Putting the value of area

$80 = 3.14 * r^2\\\frac{80}{3.14} = r^2\\r^2 = 25.477$

Taking square root on both sides

$\sqrt{r^2} = \sqrt{25.477..}\\r = 5.0475\ cm$

Now

$C = 2\pi r$

Putting the value of radius

$C = 2 * 3.14 * 5.05\\C = 31.714\ cm$

Hence,

The circumference of circle is: 31.714 cm

3 0

3 years ago

Suppose researchers marked 800 turtles and later were able to trap a total of 300 individuals in that population, of which 150 w

aleksklad [387]

The estimate for the total population size is 1600.

Setting up a proportion for this, we know that 150 out of our 300 turtle sample is marked; this is the first ratio for the proportion. We also know that we marked 800 of our total population, which we will call x:

150/300 = 800/x

Cross multiply:
150*x = 300*800
150x = 240000

Divide both sides by 150:
150x/150 = 240000/150
x = 1600

8 0

3 years ago

Which of the following are the roots of the polynomial functions?

Anit [1.1K]

Answer:

A, B

Step-by-step explanation:

Solve by factoring.

8 0

3 years ago

What is bigger 1/4 or 1/6

Luda [366]