3 years ago

Find the value of x. I WILL MARK YOU BRAINLIEST!!!

Mathematics

1 answer:

Ainat [17]3 years ago

6 0

Answer:

4x+3x+2x=180

9x=180

x=20

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7(2x-5)-11=3(5x-2)-2x

ICE Princess25 [194]

Answer:

x=40

Step-by-step explanation:

7(2x-5)-11=3(5x-2)-2x Distribute

14x-35-11=15x-6-2x Simplify

14x-46=13x-6 subtract 13x and add 46

x=40

5 0

3 years ago

The sum of two numbers is forty-five. two times the larger number is three times the smaller number.

Kitty [74]

X+y=45
2x=3y

2(45-y)=3y
90-2y=3y
90=5y
y=18

x+y=45
x+18=45
x=27

The two numbers are 18 and 27

8 0

3 years ago

Gravel is being dumped from a conveyor belt at a rate of 15 ft3/min, and its coarseness is such that it forms a pile in the shap

gayaneshka [121]

Answer:

0.13 ft/min

Step-by-step explanation:

We are given that

$\frac{dV}{dt}=15ft^3/min$

We have to find the increasing rate of change of height of pile when the pile is 12 ft high.

Let d be the diameter of pile

Height of pile=h

d=h

Radius of pile,r= $\frac{d}{2}=\frac{h}{2}$

Volume of pile= $\frac{1}{3}\pi r^2 h=\frac{1}{12}\pi h^3$

$\frac{dV}{dt}=\frac{1}{4}\pi h^2\frac{dh}{dt}$

h=12 ft

Substitute the values

$15=\frac{1}{4}\pi(12)^2\frac{dh}{dt}$

$\frac{dh}{dt}=\frac{15\times 4}{\pi(12)^2}$

$\frac{dh}{dt}=0.13ft/min$

7 0

3 years ago

Expand the following.... please help

Evgesh-ka [11]

= (3/8) (16x + - 24)
=(3/8) (16x) +(3/8)(-24)
=6x - 9

4 0

3 years ago

I need help with #13

Marizza181 [45]

40 ft of 60% (.6) = 24ft

Area- 24(40)=960ft

5 0

3 years ago