All categories

2 years ago

14 dollars for 4 books

Mathematics

2 answers:

Rudiy272 years ago

8 0

Answer:

ur question

Step-by-step explanation:

dunno

elixir [45]2 years ago

4 0

3.5 dollars for 1 book

You might be interested in

How to do this I don’t understand this please help

VashaNatasha [74]

I'm guessing you'd combine them. And the end equation would be

81x6y

7 0

3 years ago

Which number line represents the solution set for the inequality 3(8-4x) < 6(x - 5)?

PilotLPTM [1.2K]

$3(8 - 4x) < 6(x - 5) \\ 24 - 12x < 6x - 30 \\ 24 + 30 < 6x + 12x \\ 54 < 18x \\ \frac{54}{18} < \frac{18x}{18} \\ x > 3$

Solution : ] 3 , + ♾️ [

PLEASE GIVE BRAINLIEST

8 0

2 years ago

A motorboat travels 204 kilometers in 6 hours going upstream. It travels 372 kilometers going downstream in the same amount of t

Arturiano [62]

9514 1404 393

Answer:

boat: 48 km/h
current: 14 km/h

Step-by-step explanation:

The upstream speed is ...

u = (204 km)/(6 h) = 34 km/h

The downstream speed is ...

d = (372 km)/(6 h) = 62 km/h

The speed of the boat in still water is the average of these values:

b = (34 kph +62 kph)/2 = 48 kph

The speed of the water is the difference between the boat's speed and the speed made good:

w = 48 -34 = 14 . . . km/h

The rate of the boat in still water is 48 km/h. The rate of the current is 14 km/h.

5 0

2 years ago

A spotlight on the ground shines on a wall 12 m away. If a man 2 m tall walks along the x-axis from the spotlight toward the bui

Sedbober [7]

Answer:

0.675 m/s

Step-by-step explanation:

Let height of shadow= y,CD=x

Height of man=2 m

Speed of man= $\frac{dx}{dt}=1. 8 m/s$

$\triangle ABD\sim\triangle ECD$

Therefore, $\frac{AB}{EC}=\frac{BD}{CD}$

$\frac{y}{2}=\frac{12}{x}$

$xy=24$

Differentiate w.r.t t

$x\frac{dy}{dt}+y\frac{dx}{dt}=0$

$x\frac{dy}{dt}=-y\frac{dx}{dt}$

$\frac{dy}{dt}=-\frac{y}{x}\frac{dx}{dt}$

When the man is 4 m from the building

Then, we have x=12-4=8 m

$\frac{dx}{dt}=1.8 m/s$

Substitute the values in above equation then, we get

$8y=24$

$y=\frac{24}{8}=3$

Substitute the values then we get

$\frac{dy}{dt}=-\frac{3}{8}\times 1.8=-0.675 m/s$

Hence, the length of his shadow on the building decreasing at the rate 0.675 m/s.

8 0

3 years ago

9(4x - 3) -23x + 35 simplify for answer will give branliest

velikii [3]

Answer:

13x+8

Step-by-step explanation:

9(4x-3) -23x+35

36x-27-23x+35

13x+8

8 0

3 years ago

14 dollars for 4 books​

14 dollars for 4 books