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4 years ago

What's wrong with it

Mathematics

2 answers:

Veseljchak [2.6K]4 years ago

7 0

In order to simplify 20 over 30 you need to divide each number by the SAME NUMBER.

So that is what is wrong. They divided 20 over 30 by 5 and 6. That's incorrect.

stiv31 [10]4 years ago

4 0

You have to divide the fraction with one number that can go into both of them. in this case 20/30 would be divided by 10, because 10 fits in both so the answer should be 2/3

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Angle E has what measurement according to the protractor?

oksian1 [2.3K]

Answer:

Angle E has $120\°$

Step-by-step explanation:

we know that

Observing the figure, according to the protractor

Angle B has $30\°$

Angle C has $50\°$

Angle D has $90\°$

Angle E has $120\°$

Angle F has $140\°$

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3 years ago

Help help ASAP math math

Anni [7]

Answer:

-25

Step-by-step explanation:

f(-12) means x = -12

so you just plug it in the equation and solve for x

$f(x) = 3(-12)+11\\f(x) = -36+11\\f(x) = -25$

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2 years ago

720 companies 8 companies win what is the probability

Delicious77 [7]

Step-by-step explanation:

total outcomes = 720

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3 years ago

Incline mats, or triangle mats, are offered with different levels of incline to help gymnasts learn basic moves. As the name may

nata0808 [166]

Answer:

The length of the mat is 30 inches.

Step-by-step explanation:

Let H be the hypotenuse of the incline mat, L its length and h its height.

It is given that H = L + 4 and h = L - 14. Now, using Pythagoras' theorem for right-angled triangles, H² = L² + h²

(L + 4)² = L² + (L - 14)²

Expanding, we have

L² + 8L + 16 = L² + L² -28L + 196

collecting all the terms to the right side, we have

L² + L² -28L + 196 - L² - 8L - 16 = 0

L² - 36L + 180 = 0

Using the quadratic formula, L =

L $\frac{-(-36) +/- \sqrt{(-36)^{2} -4X1X180} )}{2X1} = \frac{36 +/- \sqrt{1296 - 720} }{2} \\= \frac{36 +/- \sqrt{576} }{2} \\= \frac{36 +/- 24 )}{2}\\=\frac{36 + 24}{2} or \frac{36 - 24}{2} \\=\frac{60}{2} or \frac{12}{2} \\= 30 or 6$

We use the larger answer L = 30 inches since L = 6 would give h = L -14 = 6 - 14 = -8 .

So, the length of the mat is 30 inches.

3 0

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gayaneshka [121]

Answer:

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Step-by-step explanation:

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3 years ago