Identify the transformation that carries the figure onto itself.

How do you Evaluate the expression when =x−7 and =y2 .<br> 7y-x

telo118 [61]

You said x=-7 and Y=2? if so then 7(2)--7= 21

5 0

2 years ago

Two more than 3times and the number is 17 find the number

Nonamiya [84]

Answer:

5

Step-by-step explanation:

Let the number be x

Therefore 3times the number will be 3x

3x + 2= 17

3x =17-2

3x=15

x=15/3

x= 5

5 0

2 years ago

What is the area of this triangle in the coordinate plane?

SpyIntel [72]

Answer:2. Given the points A, B, C, D, calculate:

(a) the angle B of the triangle ABC

(b) the area of the triangle ABC

(c) the median BE of the triangle ABC

(d) the height AH of the triangle ABC

(e) the volume of tetrahedron ABCD

(f) the point E so that ABCE is a parallelogram.

A(-1, 2, -3), B(4, -1, 0), C(2, 1, -2), D( 3,4,5)

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Suppose that the price p, in dollars, and the number of sales, x, of a certain item follow the equation 4 p plus 4 x plus 2 p

andreev551 [17]

Answer:

There is a decrease of 0.75 sales per day

Step-by-step explanation:

Given:-

- The price of item = p

- The number of sales = x

- The relationship between "p" and "x" is given below:

4p+4x+2px=56

Find the rate at which x is changing when x=2, p=6, and dp/dt=1.5 The rate at which x is changing is [ ] sales per day

Take the time derivative (d/dt) of the entire given expression and apply chain rule on d/dt ( 2px ). Since both "p" and "x" are only functions of time "t":

d/dt

4p+4x+2px=56

4*dp/dt + 4*dx/dt + 2*(x*dp/dt + p*dx/dt)=0

Use the given values x=2, p=6, and dp/dt=1.5 to determine dx/dt

4*1.5 + 4*dx/dt + 2*(2*1.5+6*dx/dt)=0

6+4dx/dt + 2*(3+6dx/dt)=0

6+4dx/dt + 6+12dx/dt=0

12+16dx/dt=0

12=-16dx/dt

dx/dt= 12/-16

= -0.75

7 0

3 years ago

If Alex and Brandon work together, they will finish cleaning the school in 15 hours. Working alone, Brandon can finish the same

andriy [413]

Answer:

Alex can do the job in 60 days alone.

Step-by-step explanation:

Alex and Brandon working together, they can finish the job of cleaning the school in 15 hours. Brandon alone in 20 hours can finish the job.

So, Brandon can complete $\frac{1}{20}$ part of the job in one hour.

Let, Alex alone can finish the same job in x hours.

So, Alex can complete $\frac{1}{x}$ part of the job in one hour.

So, working together they do $(\frac{1}{20} + \frac{1}{x}) = \frac{x + 20}{20x}$ part of the whole job in one hour.

Hence, from the conditions given we can write

$\frac{x + 20}{20x} = \frac{1}{15}$

⇒ 15x + 300 = 20x

⇒ 5x = 300

⇒ x = 60 days.

Therefore, Alex can do the job in 60 days alone. (Answer)

3 0

3 years ago