Ask question

Ask question

All categories

brilliants [131]

3 years ago

5

The question on the top old explain

2 answers:

Elis [28]3 years ago

8 0

So it's asking you to create an expression on how much you spent.
So you have already spent $30 on a DVD and $20 for a CD. And we don't know how much the videos are so that is x.
Your equation is going to be something like 30+20+5x but since it says it wants it in simplest form it's going to be 50+5x or 5x+50 either way that will be your equation answer. The reason it's that equation is because we know how much you spent already which is 50 and since you bought 5 videos of an unknown number that's how you get 5x.
50+5x

Hatshy [7]3 years ago

4 0

Total amount spent = 5c+30+20

You might be interested in

What transformation to the linear parent function, f(x) = x, gives the function g(x) = x + 8?

NeTakaya

Answer:

Shift 8 units up

Step-by-step explanation:

The given function is;

f(x)=x

and

g(x)=x+8

The function f(x) has its y-intercept at y=0.

The function g(x)=x+8 has its y-intercept at y=8

This implies that; the linear parent function f(x)=x is shifted up 8 units to obtain g(x)=x+8.

5 0

2 years ago

The concentration of a drug in the bloodstream C(t) at any time t, in hours, is described by the equationC(t)=100t/t^2+25where t

alisha [4.7K]

Answer:

It will take 5 hours until it reaches its maximum concentration.

Step-by-step explanation:

The maximum concentration will happen in t hours. t is found when

$C'(t) = 0$

In this problem

$C(t) = \frac{100t}{t^{2} + 25}$

Applying the quotient derivative formula

$C'(t) = \frac{(100t)'(t^{2} + 25) - (t^{2} + 25)'(100t)}{(t^{2} + 25)^{2}}$

$C'(t) = \frac{100t^{2} + 2500 - 200t^{2}}{(t^{2} + 25)^{2}}$

$C'(t) = \frac{-100t^{2} + 2500}{(t^{2} + 25)^{2}}$

A fraction is equal to zero when the numerator is 0. So

$-100t^{2} + 2500 = 0$

$100t^{2} = 2500$

$t^{2} = 25$

$t = \pm \sqrt{25}$

$t = \pm 5$

We use only positive value.

It will take 5 hours until it reaches its maximum concentration.

4 0

2 years ago

Leroy can lay 144 bricks in 3 hours. At this rate , how many bricks can he lay in 7 hours

yawa3891 [41]

Answer:

336

Step-by-step explanation:

Leroy can lay 48 bricks per hour.

48 x 7 equals 336

8 0

3 years ago

Read 2 more answers

The total weight of bags of flour and four bags of duguar is 42.6kg if each bag of suguar weighs 0.75kg what is the weight of ea

Tems11 [23]

41.85kg is the weight of the bag of flour

8 0

3 years ago

Consider two events such that P(A)=3 / 5, P(B)=4 / 7, and P(A∩B)=12 / 35. Are events A and B independent events?

xxMikexx [17]

Answer:

option D

Yes, they are independent because P(A)×P(B)=P(A∩B)

Step-by-step explanation:

Given in the question,

p(A) = 3/5

p(B) = 4/7

p(A∩B) = 12/35

If two events A and B are independent then,

<h3>P(A n B)= P(A).P(B)</h3>

12/35 = 3/5 . 4/7

12/35 = 12/35

Hence, events A and B independent events

5 0

3 years ago