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2 years ago

Please answer correctly! I will mark you as Brainleist!

Mathematics

1 answer:

Reil [10]2 years ago

3 0

Answer:

square pyramid

Step-by-step explanation:

you name a shape by its bases

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Find the inverse of f(x)=(x−5)/(−4x−2)

uysha [10]

Answer:

${f}^{ - 1} (x)= \frac{ 5 - 2x }{ 4x + 1}$

Step-by-step explanation:

The given rational function is

$f(x) = \frac{x - 5}{ - 4x - 2}$

Let

$y = \frac{x - 5}{ - 4x - 2}$

Interchange x and y

$x= \frac{y- 5}{ - 4y - 2}$

Cross multiply

$x( - 4y - 2)= y- 5$

Expand

$- 4xy - 2x= y- 5 \\ - 4xy - y= 2x - 5 \\y( - 4x - 1)= 2x - 5$

Solve for y;

$y= \frac{ 2x - 5}{ - 4x - 1}$

$y= \frac{ 5 - 2x }{ 4x + 1}$

Therefore

${f}^{ - 1} (x)= \frac{ 5 - 2x }{ 4x + 1}$

7 0

3 years ago

Calculate the angle of depression, x, if the boat is 750 ft. away from the light house and the light house is 300 ft high. Round

I am Lyosha [343]

Firstly , we need to draw diagram

we are given

opposite =300

adjacent =750

now, we can use tan formula

$tan(x)=\frac{300}{750}$

now, we can find x

$x=tan^{-1}(\frac{300}{750})$

we get

$x=21.8 degree$

so,

angle of depression is 21.8 degree.....Answer

8 0

2 years ago

Each child ticket for a ride costs $3, while each adult ticket costs $5. If the ride collected a total of $115, and 33 tickets w

strojnjashka [21]

3 x 25 =75 and then 5 x 8 =40 and you would just add 75 and 40 which is where you would get 115. So the answer would be D 25 child 8 adult
Hope this helps! :)

6 0

3 years ago

5) $250 TV on sale for 25% off, but need to include 7% tax

Fed [463]

Answer:

$200.63

Step-by-step explanation:

so i did 7% tax first than i took away 25% and got $200.63

Before Tax Price ($): 250

Tax Rate (%): 7
Final Price Including Tax ($): 267.5

Sale Tax($): 17.5
New price: $267.5
Discount percentage: 25%
Discount: $66.88
Final Price: $200.63

hoped this helped lmk if it did

3 0

3 years ago

If it took Carlos an hour to cycle from his house to the library yesterday, was the distance that he cycled greater than 6 miles

julia-pushkina [17]

Answer:

Option 2 is the correct answer.

Step-by-step explanation:

We know that

$Speed=\frac{Distance}{time}$

We have 1 mile = 5280 feet thus 6 miles = 31680 feet

Similarly 1 hour = 3600 seconds

Applying values in the equation above we get

$Speed=\frac{31680feet}{3600sec}\\\\Speed=8.8feet/sec$

Thus his average speed is less than 18feet/sec

8 0

2 years ago