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3 years ago

6

In a fish tank , 8/11 of the fish have a red stripe on them. If 16 of the fish have red stripes, how man total fish are in the t

ank? (Show proportion)

1 answer:

Basile [38]3 years ago

6 0

Answer:

Step-by-step explanation:

8/11 is equal to x/20

Cross multiply

8 times 16 and 11 times x

128=11x

Divide

Then you get 11/128

Divide and simplify!!

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Frazer is training for a cycle race. In the first week he cycles 195 miles

siniylev [52]

Answer: Hope it helps...

Step-by-step explanation: mark as an brainliest... if so

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3 years ago

(High points) please solve with explanation

AysviL [449]

Answer:

The area and the perimeter of the picture are:

<u>Area = 160 cm^2</u>
<u>Perimeter = 67.31 cm</u>

Step-by-step explanation:

To find the area of that figure, you can find the area how if it was a rectangle and next subtract the area of the triangle in the upper part. The area of a rectangle could be found by the next formula:

Area of a rectangle = base * height

As you can see in the picture, the base is 16 cm and the height is 12 cm, then we replace in the formula:

Area of a rectangle = 16 cm * 12 cm
Area of a rectangle = 192 cm^2

Now, we calculate the area of the triangle to subtract to the area we found and obtain the real area, the formula to obtain the area of a triangle is:

Area of a triangle = (base * height) / 2

The height of the triangle is 8 cm, and the base is 8 cm too, because you subtract to the base of the rectangle (16 cm) the measurements in the upper part (16 - 4 - 4 = 8), Now, we replace in the formula:

Area of a triangle = (8 cm * 8 cm) / 2
Area of a triangle = (64 cm^2) / 2
Area of a triangle = 32 cm^2

We subtract to the found area:

Area of the picture = 192 cm^2 - 32 cm^2
<u>Area of the picture = 160 cm^2</u>

To find the perimeter, you must add all the sides of the picture, but, as you can see, there is a side that doesn't have the measurent, this is the hypotenuse of the triangle used before, but how we know the other sides, we can use Pythagorean theorem:

$a^{2}+b^{2}=c^{2}$

Where:

a = Opposite leg (8 cm)
b = Adjacent leg (8 cm)

So, we replace in the theorem:

$a^{2}+b^{2}=c^{2}$

$(8 cm)^{2}+(8cm)^{2}=c^{2}$ (and we clear c)
$\sqrt{(8 cm)^{2}+(8cm)^{2}} =c$
$\sqrt{64 cm^{2}+64cm^{2}} =c$
$\sqrt{128cm^{2}} =c$
c = 11.3137085 cm
c ≅ 11.31 cm

At last, we add all the sides of the picture begining by the base and going by the left side:

Perimeter of the picture = 16 cm + 12 cm + 4 cm + 11.31 cm + 8 cm + 4 cm + 12 cm
<u>Perimeter of the picture = 67.31 cm approximately</u>.

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3 years ago

Find the value of x, which makes the area of this triangle equal 72.

TiliK225 [7]

We cannot see the triangle

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3 years ago

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A line on this coordinate plane is horizontal when every input (x) has the same output y).

This function always gives the same output with no matter what input you put it in.

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3 years ago

Elisondra is eating at a restraurant with three friends. They want to choose at random who will order first. If you model the si

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An equal-sized spinner is used to model probabilities

The spinner should have 4 equal sections

The number of friends is given as:

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When Elisondra is included, the total number of people that went to the restaurant is:

$\mathbf{n = Friends + 1}$

Substitute 3 for Friends

$\mathbf{n = 3 + 1}$

Add 3 and 1

$\mathbf{n = 4}$

The number of people that went to the restaurant is the number of equal sections of the spinner.

Hence, the spinner should have 4 equal sections

Read more about spinners at:

brainly.com/question/16425041

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3 years ago