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Morgarella [4.7K]

3 years ago

11

5{-3.4k-7} + {3k+21}

1 answer:

nekit [7.7K]3 years ago

6 0

First step is to do distributive property.

so you multiply 5 by -3.4k and -7

your equation now is -17k-35+(3k+21)

Then you add like terms

add -17k+3k to give you -14k-35+21

then you add like terms again

add -35+21 to give you -14

so now your equation is -14k-14

So that is your answer simplified

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An airplane cruises 1 kilometer in 1/12 of a minute. What is its cruising speed?

VashaNatasha [74]

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the plain is going 12km in one minute

Step-by-step explanation:

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2 years ago

A group of school children consist of 25 boys and 18 girls. how many ways are there:

Serhud [2]

Answer:

Step-by-step explanation:

1. Number of boys in the group = 25

Number of girls in the group = 18

Total children = 25 + 18 = 43

Number of ways to arrange the children in a way = 43!

2. If we consider all the boys as an individual then number of ways children can be arranged = 19!

Number of ways boys can sit next to each other = 25!

So the number of ways can be arranged = 19!×25!

3. Number of ways boys can sit next to each other = 25!

Number of ways girls can sit next to each other = 19!

Then number of ways to arrange the children in a row with all boys next to each other and all the girls next to each other will be = 2 × 18! × 25!

4. 1. To choose a chess team if anyone can be chosen

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= 6096454

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= $^{18}C_{2}\times ^{25}C_{4}=1935450$

4. 3. At least two boys must be chosen

= $^{25}C_{2}\times ^{18}C_{4}+^{25}C_{3}\times ^{18}C_{3}+^{25}C_{4}\times ^{18}C_{2}+^{25}C_{5}\times ^{18}C_{1}+^{25}C_{6}$

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8 0

4 years ago

What is the length of AB?<br> PLEASE HELP ASAP

skad [1K]

The Correct Answer is A

4 0

3 years ago

Virty [35]

<u>Answer-</u>

$\boxed{\boxed{\dfrac{\widehat{BC}}{\widehat{DE}}=\dfrac{3}{4}}}$

<u>Solution-</u>

We know that arc length is the product of radius and central angle in radian.

i.e $\text{Arc length}=\text{Radius}\times \text{Central angle}$

Here,

$\theta_{BC}=1.18\ rad,\ \theta_{DE}=2.36\ rad\\\\AD=\dfrac{2}{3}AB\Rightarrow AB=\dfrac{3}{2}AD$

So,

$\dfrac{\widehat{BC}}{\widehat{DE}}=\dfrac{AB\times 1.18}{AD\times 2.36}$

$=\dfrac{\frac{3}{2}AD\times 1.18}{AD\times 2.36}$

$=\dfrac{3\times 1}{2\times 2}$

$=\dfrac{3}{4}$

4 0

3 years ago

What is the solution to the equation -4(2x+3) =2x+6-(8x+2)?

Natali5045456 [20]

Answer:

x = -8

Step-by-step explanation:

solve:

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Hope this helps.

Good Luck

3 0

3 years ago

Read 2 more answers