All categories

2 years ago

How do you solve, not just the answer PLEASE -2r-4=3r+16

Mathematics

2 answers:

geniusboy [140]2 years ago

8 0

$-2r-4=3r+16\ \ \ |+4\\\\-2r=3r+20\ \ \ |-3r\\\\-5r=20\ \ \ \ |:(-5)\\\\r=-4$

Answer: r = -4

Nonamiya [84]2 years ago

6 0

Isolate the variable "r". Add 2r to both sides, while subtracting 16 from both sides. You will be left with -20=5r. Then you need to divide 5 from both sides. Your answer will be -4=r.

You might be interested in

The amount, A, in milligrams, of radioactive material remaining in a container can be modeled by the exponential function A(t) =

lisov135 [29]

Answer: 4 years

Step-by-step explanation:

A(0) has to be amount at start. Assume that's 5mg

Then A(t) = 5×(0.5)^(0.25t) = 5×2^(-t/4),

(also known as 5 exp(-λ t) with λ = ln(2)/4, incidentally).

We need to such that A(t) = 2.5mg, or 2^(-t/4) is 1/2, which happens when -t/4 is -1, or t is 4.

4 0

3 years ago

Alguien por favor ayuda es para hoy ¿Cuál es la velocidad a la que debe viajar un

iren2701 [21]

Answer:

Speed of vehicle = 500 km/hour

Step-by-step explanation:

Given that:

Distance travel by vehicle = 6,500 km

Time taken by vehicle = 13 hour

Find:

Speed of vehicle in kilometer per hour

Computation:

Speed = Distance / Time

Speed of vehicle = Distance travel by vehicle / Time taken by vehicle

Speed of vehicle = 6,500 / 13

Speed of vehicle = 500 kilometer per hour

8 0

2 years ago

Find the slope of the line through the points -12, 10 and -9,-15

Pavlova-9 [17]

Answer:

-25/3

Step-by-step explanation:

7 0

2 years ago

Read 2 more answers

Divide 28x3 + 42x2 - 35x by 7x

Fiesta28 [93]

The answer is $4 x^{2} +6x-5$

$\frac{28 x^{3} +42 x^{2} -35x}{7x} = \frac{28 x^{3} }{7x} + \frac{42 x^{2} }{7x} - \frac{35x}{7x} =4 x^{2} +6x-5$

8 0

3 years ago

Read 2 more answers

Is y=3/2x 6 a non linear or linear equation?

Brilliant_brown [7]

This is a linear equation as when you graph it you get a line

7 0

2 years ago