All categories

3 years ago

3x + 14 = 20 - 2x. What is x and how to solve it?

Mathematics

1 answer:

Kitty [74]3 years ago

8 0

This is how you solve it.

You might be interested in

Logan made a profit of $210.00 as a mobile groomer. He charged $75.00 per appointment and received $35.00 in tips, but also had

Nikolay [14]

Answer:

x = 7/3 - 2y/15

Step-by-step explanation:

$210.00 = $75.00x + $35.00 + $10.00

x = 7/3 - 2y/15

4 0

3 years ago

During a chemical reaction, the function y=f(t) models the amount of a substance present, in grams, at time t seconds. At the st

PtichkaEL [24]

Answer:

The solution of differential equation =

y = $\boldsymbol{\frac{10}{.2t - 1}}$

Step-by-step explanation:

Given-

y=f(t) models the amount of a substance present, in grams, at time t seconds

when t = 0 then y = 10

the differential equation is

$\boldsymbol{\frac{\mathrm{d} y}{\mathrm{d} t} = -0.02 y^{2}}$

$\frac{\mathrm{d} y}{y^{2}} = -0.02\mathrm{d} t$

Integrate both side

$\int \frac{\mathrm{d} y}{y^{2}} = \int -0.02\mathrm{d} t$

$\frac{y^{-2 + 1}}{-2 + 1} = -.02\times t$ + C

$\frac{- 1 }{y} = -.02\times t + C$

when t = 0 then y = 10

$\frac{- 1 }{10} = -.02\times 0 + C$

C = $\frac{- 1 }{10}$

$\frac{- 1 }{y} = -.02\times t - \frac{ 1 }{10}$

$\frac{ 1 }{y} = .02\times t - \frac{ 1 }{10}$

$\frac{ 1 }{y} = \frac{.2t - 1}{10}$

y = $\frac{10}{.2t - 1}$

5 0

3 years ago

What are the coordinates of the point which would complete the rectangle shown above?

Strike441 [17]

Answer:

(-3,2)

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers

PLEASE HELPPPP!! i need this quicklyyy

ale4655 [162]

Answer:

Inequality form

-4 < x < -1 or -1< x ≤ 1

Interval notation

( -4 , -1 ) ∪ ( -1 , 1 ]

8 0

3 years ago

4. Lin runs 4 laps around a track in 9 minutes at a constant speed.

Alexxx [7]

Answer:

Number of minutes per lap = 2.25 minute

Number of lap per minute = 0.444 lap (Approx)

Time taken for 15 lap = 33.75 minutes

Step-by-step explanation:

Given:

Number of laps = 4

Time taken = 9 min

Computation:

Number of minutes per lap = 9 / 4

Number of minutes per lap = 2.25 minute

Number of lap per minute = 4 / 9

Number of lap per minute = 0.444 lap (Approx)

Time taken for 15 lap = 15 x 2.25

Time taken for 15 lap = 33.75 minutes

3 0

3 years ago