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3 years ago

When labeling a pre-image and it's image, we use a small tick mark. It's called a(n):

Mathematics

2 answers:

Dmitriy789 [7]3 years ago

7 0

Answer:

It’s a prime

Step-by-step explanation:

IgorLugansk [536]3 years ago

4 0

Answer:

Prime

Step-by-step explanation:

If we have a point on a pre-image, we can have it labelled as A(x,y)

Now, we can write this as the image

To write this as the image, we simply have to add a mark on the A

This mark is at the upper right

We have it as A’ (x,y)

The part added is called a prime

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The sum of 2 rational numbers is 5/2. if one of the number is -7/3. then find the other number.

serg [7]

Answer:

can you help me on myquestio

Step-by-step explanation:

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3 years ago

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Katya has several sources of income, listed in the table. Which are considered earned income? *****Select all that apply.******

Lady_Fox [76]

Answer: $1300 per month salary

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3 years ago

Machine A working alone can complete a job in 3 1/2 hours. Machine B working alone can do the same job in 4 2/3 hours. How long

SIZIF [17.4K]

Answer:

B) 2 hours

Step-by-step explanation:

If machine A complete a job in 3 1/2 hours or 7/2 of an hour

means that in one hour finished 1÷ 7/2 or 2/7

If machine B complete a job in 4 2/3 hours or 14/3 of an hour

means that in one hour finished 1÷ 14/3 or 3/14 of an hour

Then the two machines working together in one hour will make

2/7 + 3/14 = (4 + 3)/ 14

or 7/14 = 1/2

half of the job. Therefore these two machines working together will take two hours

5 0

3 years ago

Determine which of the values is a solution of 14>22−2z. My options are 2, 5, 7, 3, -4, 0

ivann1987 [24]

Answer:

I think -4

Step-by-step explanation:

4 0

2 years ago

2. When Joey dives off a diving board, the equation of his pathway can be modeled by h = -16- + 15 + 12.

Sergeu [11.5K]

Answer:

a) The maximum height is approx 15.5 unit.

b) The time it will take for Joey to reach the water is 1.45 hour.

Step-by-step explanation:

Given : When Joey dives off a diving board, the equation of his pathway can be modeled by $h(t)= -16t^2+15t + 12$

To find : a) Find Joey's maximum height.

b) Find the time it will take for Joey to reach the water.

Solution :

Modeled $h(t)= -16t^2+15t + 12$ ....(1)

a) To find maximum height

Derivate (1) w.r.t. t,

$h'= -32t+15$

For critical point put h'=0,

$-32t+15=0$

$t=\frac{15}{32}$

$t=0.46875$

Derivate again w.r.t. t,

$h''= -32$

It is maximum at t=0.46875.

Substitute t in equation (1),

$h(0.46875)= -16(0.46875)^2+15(0.46875)+12$

$h(0.46875)= -3.515625+7.03125+12$

$h(0.46875)= 15.515625$

The maximum height is approx 15.5 unit.

b) To find the time it will take for Joey to reach the water.

Put h=0 in equation (1),

$-16t^2+15t + 12=0$

Apply quadratic formula, $x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

Here, a=-16 , b=15, c=12

$t=\frac{-15\pm\sqrt{(15)^2-4(-16)(12)}}{2(-16)}$

$t=\frac{-15\pm\sqrt{225+768}}{-32}$

$t=\frac{-15\pm\sqrt{993}}{-32}$

$t=\frac{-15+\sqrt{993}}{-32},\frac{-15-\sqrt{993}}{-32}$

$t=−0.515,1.453$

Reject negative value.

The time is t=1.45.

The time it will take for Joey to reach the water is 1.45 hour.

5 0

3 years ago