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3 years ago

Can someone explain to me how to do this ? please

Mathematics

1 answer:

Maru [420]3 years ago

8 0

Step-by-step explanation:

Ex. 4 (2n- 5) = 3n + 10

So since there is a number outside the parenthesis (which is in the first term) You have to distribute the number by multiply 4 to 2n and to -5.

(4*2n) (4*-5) = 6n - 20 (ALWAYS Carry the negative sign when you have a negative answer.)

Then, Do the addition/subtraction property which would be:

6n - 20 = 3n + 10

-3n +20 -3n + 20

3n = 30

/3 /3

n = 10

Hopefully this helps.

You might be interested in

N is inversely proportional to t and when t is 36 ,N is176 .

sergeinik [125]

Answer:

The answer is below

Step-by-step explanation:

N is inversely proportional to t, therefore:

N ∝ 1/t

Let k be the constant of proportionality, hence we can replace the relationship by:

N = k/t

Given that when t is 36, N is 176. Therefore we can find the value of k:

176 = k / 36

k = 176 * 36 = 6336

N = 6336/t

Also let us find N when t = 6. This is done by substituting t = 6 into the equation and simplifying:

N = 6336/6

N = 1056

8 0

2 years ago

Is the function f(x) = (- 7) ^ x an exponential function ? If so , identify the base . If not , why not ?

Degger [83]

Answer:

Yeah, the base is -7

Step-by-step explanation:

8 0

2 years ago

Graph f(x)=−0.5x+3. Use the line tool and select two points to graph the line.

NikAS [45]

Answer: These are some points of the grahp:

(-2,4)

(0, 3)

(2, 2)

Explanation:

1) f(x) = -0.5x + 3, is the equation of the form y = mx + b

2) y = mx + b is slope-intercept equation of a line where the slope is m and the y-intercept is b, so, f(x) = - 0.5x + b has slope m = -0.5 and y-intercept b = 3.

3) To graph f(x) = -0.5x + 3, follow these steps:

draw two perpedicular axis: vertical axis, labeled y, and horizontal axis, labeled x.
draw marks on each axis, each mark equivalent to one unit.
the intersection point of the vertical and horizontal axis is the origin, i.e. point (0,0).
you can make a table with two or more points:

x f(x) = - 0.5x + 3

-2 4

0 3

2 2

4 1

6 0

4) You can see the graph in the figure attached, and select any of the points on the line either by using the table or by using the equation f(x) = -0.5x + 3.