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3 years ago

△QRS is rotated about point P to △Q′R′S′ .

Mathematics

1 answer:

swat323 years ago

6 0

A rotation is a transformation that preserves figure shape, figure sizes, angles and lengths.

Therefore,

option A is false, because rotation preserves sizes;
option B is false, because rotation doesn't change the figure size;
option C is true, because rotation preserves figure angles;
option D is true, because rotation preserves lenghts of segments.

Answer: option C and D.

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6 more than the difference of b and 5

kirza4 [7]

The answer would be b-5+6

8 0

3 years ago

An older person is 4 years older than 7 times the age of a younger person. The sum of their ages is 44. Find their ages

Fynjy0 [20]

Answer:

5 yr and 39 yr

Step-by-step explanation:

Let x = the age of the younger

then 7x + 4 = the age of the older

Now x + 7x + 4 = 44

8x + 4 = 44

8x = 40

x = 5

7x + 4 = 7(5) + 4 = 35 + 4 = 39

Check: 5 + 39 = 44

8 0

2 years ago

F(x) = 8|x| - 5<br> f(-2) =

Anastaziya [24]

Answer:

f(-2) = 11

Step-by-step explanation:

Hello!

We can evaluate y by plugging in -2 for x in the equation.

<h3>Evaluate</h3>

f(x) = 8|x| - 5
f(-2) = 8|-2| - 5
f(-2) = 8(2) - 5 Remember that absolute value turns the number positive
f(-2) = 16 - 5
f(-2) = 11

The evaluated value is 11.

6 0

1 year ago

In how many ways can a committee of 5 people be chosen from a total of 30 possible people?

Stolb23 [73]

Answer: 142506

Step-by-step explanation:

Given : The total number of choices for people in committee = 30

The number of people need to be chosen =5

Since , here order doesn't matter, so we use combination.

The combination of r things taking from n at a time is given by :-

$C(n,r)=\dfrac{n!}{(n-r)!r!}$

Now, the number of possible combinations of 5 people be chosen from a total of 30 possible people :-

$C(30,5)=\dfrac{30!}{(30-5)!5!}\\\\=\dfrac{30\times29\times28\times27\times26}{120}\\\\=142506$

Hence, the committee can be made in 142506 ways.

3 0

2 years ago

I dont get 4 digit by 1 digit multiplcation

Leokris [45]

Answer:

we know

Step-by-step explanation:

3 0

3 years ago