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3 years ago

What is the answer to -1/2 ÷ (-1 3/8)Correct answers get brainliest

Mathematics

1 answer:

Ymorist [56]3 years ago

6 0

Answer:

-4/11

Step-by-step explanation:

The easiest way to find the answer to this is by a calculator.

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In a second grade class containing 12 girls and 11 boys, 2 students are selected at random to give out the math papers. what is

olasank [31]

The probability is defined as $\frac{number OfFavourableEvents}{numberOfEvents In TheSampleSpace}$ .

The number of ways of selecting 2 girls from 12 girls is $C(2,12)=\frac{12!}{10!2!} =66$ .The number of ways of selecting 2 student from $12+11=23$ students is $C(2,23)=\frac{23!}{21!2!} =253$ .

The required probability is $\frac{66}{253} =\frac{6}{23} =0.261$

5 0

4 years ago

If x = a sin teta and y = b cos teta

Marat540 [252]

x= a sin theta
y=b sin theta

$\\ \sf\longmapsto b^2x^2+a^2y^2$

$\\ \sf\longmapsto b^2(asin\Theta)^2+a^2(bcos\Theta)^2$

$\\ \sf\longmapsto b^2a^2sin^2\Theta+a^2b^2cos^2\Theta$

$\\ \sf\longmapsto a^2b^2(sin^2\Theta+cos^2Theta)$

$\\ \sf\longmapsto a^2+b^2(1)$

$\\ \sf\longmapsto a^2b^2$

8 0

3 years ago

Please help so I can make my family proud

Levart [38]

Answer:

A = 83.5m^2

Step-by-step explanation:

9 * 19 = 171m for the complete rectangle

9 - 4 = 5

5 * 19 = 95

95 / 2 = 47.5m for the triangles

9 * 4 = 36m

36 + 47.5 = 83.5m

Plz mark as brainliest if correct! Have a nice day!!! 

-Lil G

8 0

3 years ago

In the first pic ABC=DBE find value of x, ABC=DEF find F in the second one

FinnZ [79.3K]

First problem:

x + 8 + 51 + 83 = 180

x + 142 = 180

x = 38

Second problem:

m<C + 35 + 125 = 180

m<C + 160 = 180

m<C = 20

m<F = m<C = 20

3 0

3 years ago

Read 2 more answers

What's the solution for 13=t+2.1?

Lana71 [14]

13 = t + 2.1
13 - 2.1 = t
10.9 = t

4 0

4 years ago

Read 2 more answers