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3 years ago

PLS HELP!!!!!

Mathematics

1 answer:

gladu [14]3 years ago

7 0

$\left(\dfrac{a}{b}\right)^n=\dfrac{a^n}{b^n}\\\\\left(\dfrac{7}{4}\right)^{11}=\dfrac{7^{11}}{4^{11}}\to D)$

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im not sure wether to replace the minus signs with addition, so if you could help me that would be nice :) 1.2y+4.5-3.4y-6.3

Elenna [48]

Answer:

-2.2y - 1.8

Step-by-step explanation:

We are to simplify the expression:

1.2y + 4.5 - 3.4y - 6.3

Collect like terms:

1.2y - 3.4y + 4.5 - 6.3

Simplify:

-2.2y - 1.8

That is the answer.

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3 years ago

Determine if the following functions are inverses of each other:

Alenkasestr [34]

Answer:

both outputs are x so f(x) and g(x) are inverses of each other

Step-by-step explanation:

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3 years ago

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a fall dance sold 18 tickets during the first day of sales. this was 25% of the total sales. how many tickets were sold to the f

alexandr402 [8]

Answer:

Step-by-step explanation:

I have a weird way of doing it

so if 18 is 25%

18+18=36

then 36 would be 50%

36+36=72

so then 72 would be 100%

72*.25=18

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3 years ago

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Evaluate -1/3-(-4/9)

bija089 [108]

Answer:

To subtract fractions, find the LCD and then combine.

Exact Form:

1/9

Decimal Form:

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3 years ago

Approximately how long is a leg of an isosceles right triangle that has a hypotenuse of length 11.31

Lapatulllka [165]

Answer:

Leg of an isosceles right triangle is 7.99 long.

Step-by-step explanation:

Given:

Length of the hypotenuse =11.31

To find:

Length of the leg of an isosceles right triangle =?

Solution:

According to Pythagorean's Theorem, we have

$a^2 +b^2 = c^2$ -----------------------------(1)

Here were are given as isosceles triangle, so the two sides will be of same length

So equation 1 can be rewritten as

$a^2 +a^2 = c^2$

$2a^2 = c^2$

Substituting the value of hypotenuse

$2a^2 = (11.31)^2$

$2a^2 = 127.91$

$a^2 = \frac{127.91}{2}$

$a^2 =63.955$

$a = \sqrt{63.955}$

a = 7.99

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3 years ago